/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.server.wm;

import static android.app.ActivityManager.LOCK_TASK_MODE_NONE;
import static android.app.ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND;
import static android.app.ActivityManager.TaskDescription.ATTR_TASKDESCRIPTION_PREFIX;
import static android.app.ActivityOptions.ANIM_CLIP_REVEAL;
import static android.app.ActivityOptions.ANIM_CUSTOM;
import static android.app.ActivityOptions.ANIM_NONE;
import static android.app.ActivityOptions.ANIM_OPEN_CROSS_PROFILE_APPS;
import static android.app.ActivityOptions.ANIM_REMOTE_ANIMATION;
import static android.app.ActivityOptions.ANIM_SCALE_UP;
import static android.app.ActivityOptions.ANIM_SCENE_TRANSITION;
import static android.app.ActivityOptions.ANIM_THUMBNAIL_ASPECT_SCALE_DOWN;
import static android.app.ActivityOptions.ANIM_THUMBNAIL_ASPECT_SCALE_UP;
import static android.app.ActivityOptions.ANIM_THUMBNAIL_SCALE_DOWN;
import static android.app.ActivityOptions.ANIM_THUMBNAIL_SCALE_UP;
import static android.app.ActivityOptions.ANIM_UNDEFINED;
import static android.app.ActivityTaskManager.INVALID_TASK_ID;
import static android.app.AppOpsManager.MODE_ALLOWED;
import static android.app.AppOpsManager.OP_PICTURE_IN_PICTURE;
import static android.app.WaitResult.INVALID_DELAY;
import static android.app.WindowConfiguration.ACTIVITY_TYPE_ASSISTANT;
import static android.app.WindowConfiguration.ACTIVITY_TYPE_DREAM;
import static android.app.WindowConfiguration.ACTIVITY_TYPE_HOME;
import static android.app.WindowConfiguration.ACTIVITY_TYPE_RECENTS;
import static android.app.WindowConfiguration.ACTIVITY_TYPE_UNDEFINED;
import static android.app.WindowConfiguration.ROTATION_UNDEFINED;
import static android.app.WindowConfiguration.WINDOWING_MODE_PINNED;
import static android.app.WindowConfiguration.activityTypeToString;
import static android.content.Intent.ACTION_MAIN;
import static android.content.Intent.CATEGORY_HOME;
import static android.content.Intent.CATEGORY_LAUNCHER;
import static android.content.Intent.CATEGORY_SECONDARY_HOME;
import static android.content.Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS;
import static android.content.Intent.FLAG_ACTIVITY_NO_HISTORY;
import static android.content.pm.ActivityInfo.CONFIG_ORIENTATION;
import static android.content.pm.ActivityInfo.CONFIG_SCREEN_LAYOUT;
import static android.content.pm.ActivityInfo.CONFIG_SCREEN_SIZE;
import static android.content.pm.ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE;
import static android.content.pm.ActivityInfo.CONFIG_UI_MODE;
import static android.content.pm.ActivityInfo.CONFIG_WINDOW_CONFIGURATION;
import static android.content.pm.ActivityInfo.FLAG_ALWAYS_FOCUSABLE;
import static android.content.pm.ActivityInfo.FLAG_EXCLUDE_FROM_RECENTS;
import static android.content.pm.ActivityInfo.FLAG_IMMERSIVE;
import static android.content.pm.ActivityInfo.FLAG_INHERIT_SHOW_WHEN_LOCKED;
import static android.content.pm.ActivityInfo.FLAG_MULTIPROCESS;
import static android.content.pm.ActivityInfo.FLAG_NO_HISTORY;
import static android.content.pm.ActivityInfo.FLAG_SHOW_FOR_ALL_USERS;
import static android.content.pm.ActivityInfo.FLAG_STATE_NOT_NEEDED;
import static android.content.pm.ActivityInfo.FLAG_TURN_SCREEN_ON;
import static android.content.pm.ActivityInfo.LAUNCH_MULTIPLE;
import static android.content.pm.ActivityInfo.LAUNCH_SINGLE_INSTANCE;
import static android.content.pm.ActivityInfo.LAUNCH_SINGLE_TASK;
import static android.content.pm.ActivityInfo.LAUNCH_SINGLE_TOP;
import static android.content.pm.ActivityInfo.LOCK_TASK_LAUNCH_MODE_ALWAYS;
import static android.content.pm.ActivityInfo.LOCK_TASK_LAUNCH_MODE_DEFAULT;
import static android.content.pm.ActivityInfo.LOCK_TASK_LAUNCH_MODE_IF_WHITELISTED;
import static android.content.pm.ActivityInfo.LOCK_TASK_LAUNCH_MODE_NEVER;
import static android.content.pm.ActivityInfo.PERSIST_ACROSS_REBOOTS;
import static android.content.pm.ActivityInfo.PERSIST_ROOT_ONLY;
import static android.content.pm.ActivityInfo.RESIZE_MODE_FORCE_RESIZEABLE;
import static android.content.pm.ActivityInfo.RESIZE_MODE_RESIZEABLE;
import static android.content.pm.ActivityInfo.RESIZE_MODE_RESIZEABLE_VIA_SDK_VERSION;
import static android.content.pm.ActivityInfo.RESIZE_MODE_UNRESIZEABLE;
import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_BEHIND;
import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_UNSET;
import static android.content.pm.ActivityInfo.isFixedOrientationLandscape;
import static android.content.pm.ActivityInfo.isFixedOrientationPortrait;
import static android.content.res.Configuration.EMPTY;
import static android.content.res.Configuration.ORIENTATION_LANDSCAPE;
import static android.content.res.Configuration.ORIENTATION_PORTRAIT;
import static android.content.res.Configuration.ORIENTATION_UNDEFINED;
import static android.content.res.Configuration.UI_MODE_TYPE_MASK;
import static android.content.res.Configuration.UI_MODE_TYPE_VR_HEADSET;
import static android.os.Build.VERSION_CODES.HONEYCOMB;
import static android.os.Build.VERSION_CODES.O;
import static android.os.Process.SYSTEM_UID;
import static android.os.Trace.TRACE_TAG_WINDOW_MANAGER;
import static android.view.Display.COLOR_MODE_DEFAULT;
import static android.view.Display.INVALID_DISPLAY;
import static android.view.Surface.ROTATION_270;
import static android.view.Surface.ROTATION_90;
import static android.view.WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD;
import static android.view.WindowManager.LayoutParams.FLAG_SHOW_WALLPAPER;
import static android.view.WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;
import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_STARTING;
import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
import static android.view.WindowManager.TRANSIT_ACTIVITY_CLOSE;
import static android.view.WindowManager.TRANSIT_TASK_CLOSE;
import static android.view.WindowManager.TRANSIT_TASK_OPEN_BEHIND;
import static android.view.WindowManager.TRANSIT_UNSET;

import static com.android.server.policy.WindowManagerPolicy.FINISH_LAYOUT_REDO_ANIM;
import static com.android.server.policy.WindowManagerPolicy.FINISH_LAYOUT_REDO_WALLPAPER;
import static com.android.server.wm.ActivityRecordProto.ALL_DRAWN;
import static com.android.server.wm.ActivityRecordProto.APP_STOPPED;
import static com.android.server.wm.ActivityRecordProto.CLIENT_VISIBLE;
import static com.android.server.wm.ActivityRecordProto.DEFER_HIDING_CLIENT;
import static com.android.server.wm.ActivityRecordProto.FILLS_PARENT;
import static com.android.server.wm.ActivityRecordProto.FRONT_OF_TASK;
import static com.android.server.wm.ActivityRecordProto.FROZEN_BOUNDS;
import static com.android.server.wm.ActivityRecordProto.IDENTIFIER;
import static com.android.server.wm.ActivityRecordProto.IS_ANIMATING;
import static com.android.server.wm.ActivityRecordProto.IS_WAITING_FOR_TRANSITION_START;
import static com.android.server.wm.ActivityRecordProto.LAST_ALL_DRAWN;
import static com.android.server.wm.ActivityRecordProto.LAST_SURFACE_SHOWING;
import static com.android.server.wm.ActivityRecordProto.NAME;
import static com.android.server.wm.ActivityRecordProto.NUM_DRAWN_WINDOWS;
import static com.android.server.wm.ActivityRecordProto.NUM_INTERESTING_WINDOWS;
import static com.android.server.wm.ActivityRecordProto.PROC_ID;
import static com.android.server.wm.ActivityRecordProto.REPORTED_DRAWN;
import static com.android.server.wm.ActivityRecordProto.REPORTED_VISIBLE;
import static com.android.server.wm.ActivityRecordProto.STARTING_DISPLAYED;
import static com.android.server.wm.ActivityRecordProto.STARTING_MOVED;
import static com.android.server.wm.ActivityRecordProto.STARTING_WINDOW;
import static com.android.server.wm.ActivityRecordProto.STATE;
import static com.android.server.wm.ActivityRecordProto.THUMBNAIL;
import static com.android.server.wm.ActivityRecordProto.TRANSLUCENT;
import static com.android.server.wm.ActivityRecordProto.VISIBLE;
import static com.android.server.wm.ActivityRecordProto.VISIBLE_REQUESTED;
import static com.android.server.wm.ActivityRecordProto.VISIBLE_SET_FROM_TRANSFERRED_STARTING_WINDOW;
import static com.android.server.wm.ActivityRecordProto.WINDOW_TOKEN;
import static com.android.server.wm.ActivityStack.ActivityState.DESTROYED;
import static com.android.server.wm.ActivityStack.ActivityState.DESTROYING;
import static com.android.server.wm.ActivityStack.ActivityState.FINISHING;
import static com.android.server.wm.ActivityStack.ActivityState.INITIALIZING;
import static com.android.server.wm.ActivityStack.ActivityState.PAUSED;
import static com.android.server.wm.ActivityStack.ActivityState.PAUSING;
import static com.android.server.wm.ActivityStack.ActivityState.RESTARTING_PROCESS;
import static com.android.server.wm.ActivityStack.ActivityState.RESUMED;
import static com.android.server.wm.ActivityStack.ActivityState.STARTED;
import static com.android.server.wm.ActivityStack.ActivityState.STOPPED;
import static com.android.server.wm.ActivityStack.ActivityState.STOPPING;
import static com.android.server.wm.ActivityStack.STACK_VISIBILITY_VISIBLE;
import static com.android.server.wm.ActivityStackSupervisor.PRESERVE_WINDOWS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_APP;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_CLEANUP;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_CONFIGURATION;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_CONTAINERS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_FOCUS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_PAUSE;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_RESULTS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_SAVED_STATE;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_STATES;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_SWITCH;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_TRANSITION;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_USER_LEAVING;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_VISIBILITY;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_ADD_REMOVE;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_APP;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_CONFIGURATION;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_CONTAINERS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_FOCUS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_PAUSE;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_RESULTS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_SAVED_STATE;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_STATES;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_SWITCH;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_TRANSITION;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_USER_LEAVING;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.POSTFIX_VISIBILITY;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.TAG_ATM;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.TAG_WITH_CLASS_NAME;
import static com.android.server.wm.ActivityTaskManagerService.RELAUNCH_REASON_FREE_RESIZE;
import static com.android.server.wm.ActivityTaskManagerService.RELAUNCH_REASON_NONE;
import static com.android.server.wm.ActivityTaskManagerService.RELAUNCH_REASON_WINDOWING_MODE_RESIZE;
import static com.android.server.wm.ActivityTaskManagerService.getInputDispatchingTimeoutLocked;
import static com.android.server.wm.IdentifierProto.HASH_CODE;
import static com.android.server.wm.IdentifierProto.TITLE;
import static com.android.server.wm.IdentifierProto.USER_ID;
import static com.android.server.wm.ProtoLogGroup.WM_DEBUG_ADD_REMOVE;
import static com.android.server.wm.ProtoLogGroup.WM_DEBUG_APP_TRANSITIONS;
import static com.android.server.wm.ProtoLogGroup.WM_DEBUG_APP_TRANSITIONS_ANIM;
import static com.android.server.wm.ProtoLogGroup.WM_DEBUG_FOCUS_LIGHT;
import static com.android.server.wm.ProtoLogGroup.WM_DEBUG_ORIENTATION;
import static com.android.server.wm.ProtoLogGroup.WM_DEBUG_STARTING_WINDOW;
import static com.android.server.wm.SurfaceAnimator.ANIMATION_TYPE_APP_TRANSITION;
import static com.android.server.wm.SurfaceAnimator.ANIMATION_TYPE_SCREEN_ROTATION;
import static com.android.server.wm.TaskPersister.DEBUG;
import static com.android.server.wm.TaskPersister.IMAGE_EXTENSION;
import static com.android.server.wm.WindowContainer.AnimationFlags.CHILDREN;
import static com.android.server.wm.WindowContainer.AnimationFlags.PARENTS;
import static com.android.server.wm.WindowContainer.AnimationFlags.TRANSITION;
import static com.android.server.wm.WindowContainerChildProto.ACTIVITY;
import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_ANIM;
import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_LAYOUT_REPEATS;
import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_STARTING_WINDOW_VERBOSE;
import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM;
import static com.android.server.wm.WindowManagerService.UPDATE_FOCUS_NORMAL;
import static com.android.server.wm.WindowManagerService.UPDATE_FOCUS_WILL_PLACE_SURFACES;
import static com.android.server.wm.WindowState.LEGACY_POLICY_VISIBILITY;
import static com.android.server.wm.WindowStateAnimator.HAS_DRAWN;
import static com.android.server.wm.WindowStateAnimator.STACK_CLIP_BEFORE_ANIM;

import static org.xmlpull.v1.XmlPullParser.END_DOCUMENT;
import static org.xmlpull.v1.XmlPullParser.END_TAG;
import static org.xmlpull.v1.XmlPullParser.START_TAG;

import android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.Size;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.TaskDescription;
import android.app.ActivityOptions;
import android.app.PendingIntent;
import android.app.PictureInPictureParams;
import android.app.ResultInfo;
import android.app.WaitResult.LaunchState;
import android.app.servertransaction.ActivityConfigurationChangeItem;
import android.app.servertransaction.ActivityLifecycleItem;
import android.app.servertransaction.ActivityRelaunchItem;
import android.app.servertransaction.ActivityResultItem;
import android.app.servertransaction.ClientTransaction;
import android.app.servertransaction.ClientTransactionItem;
import android.app.servertransaction.DestroyActivityItem;
import android.app.servertransaction.MoveToDisplayItem;
import android.app.servertransaction.NewIntentItem;
import android.app.servertransaction.PauseActivityItem;
import android.app.servertransaction.ResumeActivityItem;
import android.app.servertransaction.StartActivityItem;
import android.app.servertransaction.StopActivityItem;
import android.app.servertransaction.TopResumedActivityChangeItem;
import android.app.usage.UsageEvents.Event;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.ApplicationInfo;
import android.content.res.CompatibilityInfo;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.GraphicBuffer;
import android.graphics.PixelFormat;
import android.graphics.Point;
import android.graphics.Rect;
import android.net.Uri;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
import android.os.Debug;
import android.os.IBinder;
import android.os.PersistableBundle;
import android.os.Process;
import android.os.RemoteException;
import android.os.SystemClock;
import android.os.Trace;
import android.os.UserHandle;
import android.os.storage.StorageManager;
import android.service.dreams.DreamActivity;
import android.service.dreams.DreamManagerInternal;
import android.service.voice.IVoiceInteractionSession;
import android.util.ArraySet;
import android.util.EventLog;
import android.util.Log;
import android.util.MergedConfiguration;
import android.util.Slog;
import android.util.TimeUtils;
import android.util.proto.ProtoOutputStream;
import android.view.AppTransitionAnimationSpec;
import android.view.DisplayCutout;
import android.view.DisplayInfo;
import android.view.IAppTransitionAnimationSpecsFuture;
import android.view.IApplicationToken;
import android.view.InputApplicationHandle;
import android.view.RemoteAnimationDefinition;
import android.view.RemoteAnimationTarget;
import android.view.SurfaceControl;
import android.view.SurfaceControl.Transaction;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
import android.view.animation.Animation;
import android.window.WindowContainerToken;

import com.android.internal.R;
import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.app.ResolverActivity;
import com.android.internal.content.ReferrerIntent;
import com.android.internal.util.ToBooleanFunction;
import com.android.internal.util.XmlUtils;
import com.android.internal.util.function.pooled.PooledConsumer;
import com.android.internal.util.function.pooled.PooledFunction;
import com.android.internal.util.function.pooled.PooledLambda;
import com.android.server.AttributeCache;
import com.android.server.LocalServices;
import com.android.server.am.AppTimeTracker;
import com.android.server.am.PendingIntentRecord;
import com.android.server.display.color.ColorDisplayService;
import com.android.server.policy.WindowManagerPolicy;
import com.android.server.protolog.common.ProtoLog;
import com.android.server.uri.UriPermissionOwner;
import com.android.server.wm.ActivityMetricsLogger.TransitionInfoSnapshot;
import com.android.server.wm.ActivityStack.ActivityState;
import com.android.server.wm.SurfaceAnimator.AnimationType;
import com.android.server.wm.SurfaceAnimator.OnAnimationFinishedCallback;
import com.android.server.wm.WindowManagerService.H;
import com.android.server.wm.utils.InsetUtils;

import com.google.android.collect.Sets;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlSerializer;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.ref.WeakReference;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.function.Predicate;

/**
 * An entry in the history stack, representing an activity.
 */
final class ActivityRecord extends WindowToken implements WindowManagerService.AppFreezeListener {
    private static final String TAG = TAG_WITH_CLASS_NAME ? "ActivityRecord" : TAG_ATM;
    private static final String TAG_ADD_REMOVE = TAG + POSTFIX_ADD_REMOVE;
    private static final String TAG_APP = TAG + POSTFIX_APP;
    private static final String TAG_CONFIGURATION = TAG + POSTFIX_CONFIGURATION;
    private static final String TAG_CONTAINERS = TAG + POSTFIX_CONTAINERS;
    private static final String TAG_FOCUS = TAG + POSTFIX_FOCUS;
    private static final String TAG_PAUSE = TAG + POSTFIX_PAUSE;
    private static final String TAG_RESULTS = TAG + POSTFIX_RESULTS;
    private static final String TAG_SAVED_STATE = TAG + POSTFIX_SAVED_STATE;
    private static final String TAG_STATES = TAG + POSTFIX_STATES;
    private static final String TAG_SWITCH = TAG + POSTFIX_SWITCH;
    private static final String TAG_TRANSITION = TAG + POSTFIX_TRANSITION;
    private static final String TAG_USER_LEAVING = TAG + POSTFIX_USER_LEAVING;
    private static final String TAG_VISIBILITY = TAG + POSTFIX_VISIBILITY;

    private static final String ATTR_ID = "id";
    private static final String TAG_INTENT = "intent";
    private static final String ATTR_USERID = "user_id";
    private static final String TAG_PERSISTABLEBUNDLE = "persistable_bundle";
    private static final String ATTR_LAUNCHEDFROMUID = "launched_from_uid";
    private static final String ATTR_LAUNCHEDFROMPACKAGE = "launched_from_package";
    private static final String ATTR_LAUNCHEDFROMFEATURE = "launched_from_feature";
    private static final String ATTR_RESOLVEDTYPE = "resolved_type";
    private static final String ATTR_COMPONENTSPECIFIED = "component_specified";
    static final String ACTIVITY_ICON_SUFFIX = "_activity_icon_";

    // How many activities have to be scheduled to stop to force a stop pass.
    private static final int MAX_STOPPING_TO_FORCE = 3;

    private static final int STARTING_WINDOW_TYPE_NONE = 0;
    private static final int STARTING_WINDOW_TYPE_SNAPSHOT = 1;
    private static final int STARTING_WINDOW_TYPE_SPLASH_SCREEN = 2;

    /**
     * Value to increment the z-layer when boosting a layer during animations. BOOST in l33tsp34k.
     */
    @VisibleForTesting static final int Z_BOOST_BASE = 800570000;
    static final int INVALID_PID = -1;

    // How long we wait until giving up on the last activity to pause.  This
    // is short because it directly impacts the responsiveness of starting the
    // next activity.
    private static final int PAUSE_TIMEOUT = 500;

    // Ticks during which we check progress while waiting for an app to launch.
    private static final int LAUNCH_TICK = 500;

    // How long we wait for the activity to tell us it has stopped before
    // giving up.  This is a good amount of time because we really need this
    // from the application in order to get its saved state. Once the stop
    // is complete we may start destroying client resources triggering
    // crashes if the UI thread was hung. We put this timeout one second behind
    // the ANR timeout so these situations will generate ANR instead of
    // Surface lost or other errors.
    private static final int STOP_TIMEOUT = 11 * 1000;

    // How long we wait until giving up on an activity telling us it has
    // finished destroying itself.
    private static final int DESTROY_TIMEOUT = 10 * 1000;

    final ActivityTaskManagerService mAtmService;
    final ActivityInfo info; // activity info provided by developer in AndroidManifest
    // Non-null only for application tokens.
    // TODO: rename to mActivityToken
    final ActivityRecord.Token appToken;
    // Which user is this running for?
    final int mUserId;
    // The package implementing intent's component
    // TODO: rename to mPackageName
    final String packageName;
    // the intent component, or target of an alias.
    final ComponentName mActivityComponent;
    // Has a wallpaper window as a background.
    // TODO: Rename to mHasWallpaper and also see if it possible to combine this with the
    // mOccludesParent field.
    final boolean hasWallpaper;
    // Input application handle used by the input dispatcher.
    final InputApplicationHandle mInputApplicationHandle;

    final int launchedFromPid; // always the pid who started the activity.
    final int launchedFromUid; // always the uid who started the activity.
    final String launchedFromPackage; // always the package who started the activity.
    final @Nullable String launchedFromFeatureId; // always the feature in launchedFromPackage
    final Intent intent;    // the original intent that generated us
    final String shortComponentName; // the short component name of the intent
    final String resolvedType; // as per original caller;
    final String processName; // process where this component wants to run
    final String taskAffinity; // as per ActivityInfo.taskAffinity
    final boolean stateNotNeeded; // As per ActivityInfo.flags
    @VisibleForTesting
    int mHandoverLaunchDisplayId = INVALID_DISPLAY; // Handover launch display id to next activity.
    @VisibleForTesting
    TaskDisplayArea mHandoverTaskDisplayArea; // Handover launch task display area.
    private final boolean componentSpecified;  // did caller specify an explicit component?
    final boolean rootVoiceInteraction;  // was this the root activity of a voice interaction?

    private CharSequence nonLocalizedLabel;  // the label information from the package mgr.
    private int labelRes;           // the label information from the package mgr.
    private int icon;               // resource identifier of activity's icon.
    private int logo;               // resource identifier of activity's logo.
    private int theme;              // resource identifier of activity's theme.
    private int windowFlags;        // custom window flags for preview window.
    private Task task;              // the task this is in.
    private long createTime = System.currentTimeMillis();
    long lastVisibleTime;         // last time this activity became visible
    long cpuTimeAtResume;         // the cpu time of host process at the time of resuming activity
    long pauseTime;               // last time we started pausing the activity
    long launchTickTime;          // base time for launch tick messages
    long topResumedStateLossTime; // last time we reported top resumed state loss to an activity
    // Last configuration reported to the activity in the client process.
    private MergedConfiguration mLastReportedConfiguration;
    private int mLastReportedDisplayId;
    boolean mLastReportedMultiWindowMode;
    boolean mLastReportedPictureInPictureMode;
    CompatibilityInfo compat;// last used compatibility mode
    ActivityRecord resultTo; // who started this entry, so will get our reply
    final String resultWho; // additional identifier for use by resultTo.
    final int requestCode;  // code given by requester (resultTo)
    ArrayList<ResultInfo> results; // pending ActivityResult objs we have received
    HashSet<WeakReference<PendingIntentRecord>> pendingResults; // all pending intents for this act
    ArrayList<ReferrerIntent> newIntents; // any pending new intents for single-top mode
    Intent mLastNewIntent;  // the last new intent we delivered to client
    ActivityOptions pendingOptions; // most recently given options
    ActivityOptions returningOptions; // options that are coming back via convertToTranslucent
    AppTimeTracker appTimeTracker; // set if we are tracking the time in this app/task/activity
    ActivityServiceConnectionsHolder mServiceConnectionsHolder; // Service connections.
    UriPermissionOwner uriPermissions; // current special URI access perms.
    WindowProcessController app;      // if non-null, hosting application
    private ActivityState mState;    // current state we are in
    private Bundle mIcicle;         // last saved activity state
    private PersistableBundle mPersistentState; // last persistently saved activity state
    private boolean mHaveState = true; // Indicates whether the last saved state of activity is
                                       // preserved. This starts out 'true', since the initial state
                                       // of an activity is that we have everything, and we should
                                       // never consider it lacking in state to be removed if it
                                       // dies. After an activity is launched it follows the value
                                       // of #mIcicle.
    boolean launchFailed;   // set if a launched failed, to abort on 2nd try
    boolean stopped;        // is activity pause finished?
    boolean delayedResume;  // not yet resumed because of stopped app switches?
    boolean finishing;      // activity in pending finish list?
    boolean deferRelaunchUntilPaused;   // relaunch of activity is being deferred until pause is
                                        // completed
    boolean preserveWindowOnDeferredRelaunch; // activity windows are preserved on deferred relaunch
    int configChangeFlags;  // which config values have changed
    private boolean keysPaused;     // has key dispatching been paused for it?
    int launchMode;         // the launch mode activity attribute.
    int lockTaskLaunchMode; // the lockTaskMode manifest attribute, subject to override
    private boolean mVisible;        // Should this token's windows be visible?
    boolean visibleIgnoringKeyguard; // is this activity visible, ignoring the fact that Keyguard
                                     // might hide this activity?
    // True if the visible state of this token was forced to true due to a transferred starting
    // window.
    private boolean mVisibleSetFromTransferredStartingWindow;
    // TODO: figure out how to consolidate with the same variable in ActivityRecord.
    private boolean mDeferHidingClient; // If true we told WM to defer reporting to the client
                                        // process that it is hidden.
    private boolean mLastDeferHidingClient; // If true we will defer setting mClientVisible to false
                                           // and reporting to the client that it is hidden.
    private boolean mSetToSleep; // have we told the activity to sleep?
    boolean nowVisible;     // is this activity's window visible?
    boolean mDrawn;          // is this activity's window drawn?
    boolean mClientVisibilityDeferred;// was the visibility change message to client deferred?
    boolean idle;           // has the activity gone idle?
    boolean hasBeenLaunched;// has this activity ever been launched?
    boolean frozenBeforeDestroy;// has been frozen but not yet destroyed.
    boolean immersive;      // immersive mode (don't interrupt if possible)
    boolean forceNewConfig; // force re-create with new config next time
    boolean supportsEnterPipOnTaskSwitch;  // This flag is set by the system to indicate that the
        // activity can enter picture in picture while pausing (only when switching to another task)
    PictureInPictureParams pictureInPictureArgs = new PictureInPictureParams.Builder().build();
        // The PiP params used when deferring the entering of picture-in-picture.
    int launchCount;        // count of launches since last state
    long lastLaunchTime;    // time of last launch of this activity
    ComponentName requestedVrComponent; // the requested component for handling VR mode.

    boolean inHistory;  // are we in the history stack?
    final ActivityStackSupervisor mStackSupervisor;
    final RootWindowContainer mRootWindowContainer;

    static final int STARTING_WINDOW_NOT_SHOWN = 0;
    static final int STARTING_WINDOW_SHOWN = 1;
    static final int STARTING_WINDOW_REMOVED = 2;
    int mStartingWindowState = STARTING_WINDOW_NOT_SHOWN;
    private boolean mTaskOverlay = false; // Task is always on-top of other activities in the task.

    // Marking the reason why this activity is being relaunched. Mainly used to track that this
    // activity is being relaunched to fulfill a resize request due to compatibility issues, e.g. in
    // pre-NYC apps that don't have a sense of being resized.
    int mRelaunchReason = RELAUNCH_REASON_NONE;

    TaskDescription taskDescription; // the recents information for this activity

    // These configurations are collected from application's resources based on size-sensitive
    // qualifiers. For example, layout-w800dp will be added to mHorizontalSizeConfigurations as 800
    // and drawable-sw400dp will be added to both as 400.
    private int[] mVerticalSizeConfigurations;
    private int[] mHorizontalSizeConfigurations;
    private int[] mSmallestSizeConfigurations;

    /**
     * The precomputed display insets for resolving configuration. It will be non-null if
     * {@link #shouldUseSizeCompatMode} returns {@code true}.
     */
    private CompatDisplayInsets mCompatDisplayInsets;

    boolean pendingVoiceInteractionStart;   // Waiting for activity-invoked voice session
    IVoiceInteractionSession voiceSession;  // Voice interaction session for this activity

    boolean mVoiceInteraction;

    private int mPendingRelaunchCount;

    // True if we are current in the process of removing this app token from the display
    private boolean mRemovingFromDisplay = false;

    private RemoteAnimationDefinition mRemoteAnimationDefinition;

    AnimatingActivityRegistry mAnimatingActivityRegistry;

    private Task mLastParent;

    // Have we told the window clients to show themselves?
    private boolean mClientVisible;

    boolean firstWindowDrawn;
    // Last drawn state we reported to the app token.
    private boolean reportedDrawn;
    private final WindowState.UpdateReportedVisibilityResults mReportedVisibilityResults =
            new WindowState.UpdateReportedVisibilityResults();

    private boolean mUseTransferredAnimation;

    /**
     * @see #currentLaunchCanTurnScreenOn()
     */
    private boolean mCurrentLaunchCanTurnScreenOn = true;

    /** Whether our surface was set to be showing in the last call to {@link #prepareSurfaces} */
    private boolean mLastSurfaceShowing = true;

    private Letterbox mLetterbox;

    /**
     * The activity is opaque and fills the entire space of this task.
     * @see WindowContainer#fillsParent()
     */
    private boolean mOccludesParent;

    // The input dispatching timeout for this application token in nanoseconds.
    long mInputDispatchingTimeoutNanos;

    private boolean mShowWhenLocked;
    private boolean mInheritShownWhenLocked;
    private boolean mTurnScreenOn;

    /** Have we been asked to have this token keep the screen frozen? */
    private boolean mFreezingScreen;

    // These are used for determining when all windows associated with
    // an activity have been drawn, so they can be made visible together
    // at the same time.
    // initialize so that it doesn't match mTransactionSequence which is an int.
    private long mLastTransactionSequence = Long.MIN_VALUE;
    private int mNumInterestingWindows;
    private int mNumDrawnWindows;
    boolean allDrawn;
    private boolean mLastAllDrawn;

    private boolean mLastContainsShowWhenLockedWindow;
    private boolean mLastContainsDismissKeyguardWindow;
    private boolean mLastContainsTurnScreenOnWindow;

    /**
     * A flag to determine if this AR is in the process of closing or entering PIP. This is needed
     * to help AR know that the app is in the process of closing but hasn't yet started closing on
     * the WM side.
     */
    private boolean mWillCloseOrEnterPip;

    /**
     * The scale to fit at least one side of the activity to its parent. If the activity uses
     * 1920x1080, and the actually size on the screen is 960x540, then the scale is 0.5.
     */
    private float mSizeCompatScale = 1f;
    /**
     * The bounds in global coordinates for activity in size compatibility mode.
     * @see ActivityRecord#hasSizeCompatBounds()
     */
    private Rect mSizeCompatBounds;

    // activity is not displayed?
    // TODO: rename to mNoDisplay
    @VisibleForTesting
    boolean noDisplay;
    boolean mShowForAllUsers;
    // TODO: Make this final
    int mTargetSdk;

    // Is this window's surface needed?  This is almost like visible, except
    // it will sometimes be true a little earlier: when the activity record has
    // been shown, but is still waiting for its app transition to execute
    // before making its windows shown.
    boolean mVisibleRequested;

    // Last visibility state we reported to the app token.
    boolean reportedVisible;

    boolean mDisablePreviewScreenshots;

    // Information about an application starting window if displayed.
    // Note: these are de-referenced before the starting window animates away.
    StartingData mStartingData;
    WindowState startingWindow;
    WindowManagerPolicy.StartingSurface startingSurface;
    boolean startingDisplayed;
    boolean startingMoved;

    // TODO: Have a WindowContainer state for tracking exiting/deferred removal.
    boolean mIsExiting;

    boolean mEnteringAnimation;

    boolean mAppStopped;
    // A hint to override the window specified rotation animation, or -1 to use the window specified
    // value. We use this so that we can select the right animation in the cases of starting
    // windows, where the app hasn't had time to set a value on the window.
    int mRotationAnimationHint = -1;

    ArrayDeque<Rect> mFrozenBounds = new ArrayDeque<>();
    ArrayDeque<Configuration> mFrozenMergedConfig = new ArrayDeque<>();

    private AppSaturationInfo mLastAppSaturationInfo;

    private final ColorDisplayService.ColorTransformController mColorTransformController =
            (matrix, translation) -> mWmService.mH.post(() -> {
                synchronized (mWmService.mGlobalLock) {
                    if (mLastAppSaturationInfo == null) {
                        mLastAppSaturationInfo = new AppSaturationInfo();
                    }

                    mLastAppSaturationInfo.setSaturation(matrix, translation);
                    updateColorTransform();
                }
            });

    /**
     * Current sequencing integer of the configuration, for skipping old activity configurations.
     */
    private int mConfigurationSeq;

    /**
     * Temp configs used in {@link #ensureActivityConfiguration(int, boolean)}
     */
    private final Configuration mTmpConfig = new Configuration();
    private final Rect mTmpBounds = new Rect();

    // Token for targeting this activity for assist purposes.
    final Binder assistToken = new Binder();

    private final Runnable mPauseTimeoutRunnable = new Runnable() {
        @Override
        public void run() {
            // We don't at this point know if the activity is fullscreen,
            // so we need to be conservative and assume it isn't.
            Slog.w(TAG, "Activity pause timeout for " + ActivityRecord.this);
            synchronized (mAtmService.mGlobalLock) {
                if (hasProcess()) {
                    mAtmService.logAppTooSlow(app, pauseTime, "pausing " + ActivityRecord.this);
                }
                activityPaused(true);
            }
        }
    };

    private final Runnable mLaunchTickRunnable = new Runnable() {
        @Override
        public void run() {
            synchronized (mAtmService.mGlobalLock) {
                if (continueLaunchTicking()) {
                    mAtmService.logAppTooSlow(
                            app, launchTickTime, "launching " + ActivityRecord.this);
                }
            }
        }
    };

    private final Runnable mDestroyTimeoutRunnable = new Runnable() {
        @Override
        public void run() {
            synchronized (mAtmService.mGlobalLock) {
                Slog.w(TAG, "Activity destroy timeout for " + ActivityRecord.this);
                destroyed("destroyTimeout");
            }
        }
    };

    private final Runnable mStopTimeoutRunnable = new Runnable() {
        @Override
        public void run() {
            synchronized (mAtmService.mGlobalLock) {
                Slog.w(TAG, "Activity stop timeout for " + ActivityRecord.this);
                if (isInHistory()) {
                    activityStopped(
                            null /*icicle*/, null /*persistentState*/, null /*description*/);
                }
            }
        }
    };

    private static String startingWindowStateToString(int state) {
        switch (state) {
            case STARTING_WINDOW_NOT_SHOWN:
                return "STARTING_WINDOW_NOT_SHOWN";
            case STARTING_WINDOW_SHOWN:
                return "STARTING_WINDOW_SHOWN";
            case STARTING_WINDOW_REMOVED:
                return "STARTING_WINDOW_REMOVED";
            default:
                return "unknown state=" + state;
        }
    }

    @Override
    void dump(PrintWriter pw, String prefix, boolean dumpAll) {
        final long now = SystemClock.uptimeMillis();
        pw.print(prefix); pw.print("packageName="); pw.print(packageName);
                pw.print(" processName="); pw.println(processName);
        pw.print(prefix); pw.print("launchedFromUid="); pw.print(launchedFromUid);
                pw.print(" launchedFromPackage="); pw.print(launchedFromPackage);
                pw.print(" launchedFromFeature="); pw.print(launchedFromFeatureId);
                pw.print(" userId="); pw.println(mUserId);
        pw.print(prefix); pw.print("app="); pw.println(app);
        pw.print(prefix); pw.println(intent.toInsecureString());
        pw.print(prefix); pw.print("rootOfTask="); pw.print(isRootOfTask());
                pw.print(" task="); pw.println(task);
        pw.print(prefix); pw.print("taskAffinity="); pw.println(taskAffinity);
        pw.print(prefix); pw.print("mActivityComponent=");
                pw.println(mActivityComponent.flattenToShortString());
        if (info != null && info.applicationInfo != null) {
            final ApplicationInfo appInfo = info.applicationInfo;
            pw.print(prefix); pw.print("baseDir="); pw.println(appInfo.sourceDir);
            if (!Objects.equals(appInfo.sourceDir, appInfo.publicSourceDir)) {
                pw.print(prefix); pw.print("resDir="); pw.println(appInfo.publicSourceDir);
            }
            pw.print(prefix); pw.print("dataDir="); pw.println(appInfo.dataDir);
            if (appInfo.splitSourceDirs != null) {
                pw.print(prefix); pw.print("splitDir=");
                        pw.println(Arrays.toString(appInfo.splitSourceDirs));
            }
        }
        pw.print(prefix); pw.print("stateNotNeeded="); pw.print(stateNotNeeded);
                pw.print(" componentSpecified="); pw.print(componentSpecified);
                pw.print(" mActivityType="); pw.println(
                        activityTypeToString(getActivityType()));
        if (rootVoiceInteraction) {
            pw.print(prefix); pw.print("rootVoiceInteraction="); pw.println(rootVoiceInteraction);
        }
        pw.print(prefix); pw.print("compat="); pw.print(compat);
                pw.print(" labelRes=0x"); pw.print(Integer.toHexString(labelRes));
                pw.print(" icon=0x"); pw.print(Integer.toHexString(icon));
                pw.print(" theme=0x"); pw.println(Integer.toHexString(theme));
        pw.println(prefix + "mLastReportedConfigurations:");
        mLastReportedConfiguration.dump(pw, prefix + "  ");

        pw.print(prefix); pw.print("CurrentConfiguration="); pw.println(getConfiguration());
        if (!getRequestedOverrideConfiguration().equals(EMPTY)) {
            pw.println(prefix + "RequestedOverrideConfiguration="
                    + getRequestedOverrideConfiguration());
        }
        if (!getResolvedOverrideConfiguration().equals(getRequestedOverrideConfiguration())) {
            pw.println(prefix + "ResolvedOverrideConfiguration="
                    + getResolvedOverrideConfiguration());
        }
        if (!matchParentBounds()) {
            pw.println(prefix + "bounds=" + getBounds());
        }
        if (resultTo != null || resultWho != null) {
            pw.print(prefix); pw.print("resultTo="); pw.print(resultTo);
                    pw.print(" resultWho="); pw.print(resultWho);
                    pw.print(" resultCode="); pw.println(requestCode);
        }
        if (taskDescription != null) {
            final String iconFilename = taskDescription.getIconFilename();
            if (iconFilename != null || taskDescription.getLabel() != null ||
                    taskDescription.getPrimaryColor() != 0) {
                pw.print(prefix); pw.print("taskDescription:");
                        pw.print(" label=\""); pw.print(taskDescription.getLabel());
                                pw.print("\"");
                        pw.print(" icon="); pw.print(taskDescription.getInMemoryIcon() != null
                                ? taskDescription.getInMemoryIcon().getByteCount() + " bytes"
                                : "null");
                        pw.print(" iconResource=");
                                pw.print(taskDescription.getIconResourcePackage());
                                pw.print("/");
                                pw.print(taskDescription.getIconResource());
                        pw.print(" iconFilename="); pw.print(taskDescription.getIconFilename());
                        pw.print(" primaryColor=");
                        pw.println(Integer.toHexString(taskDescription.getPrimaryColor()));
                        pw.print(prefix); pw.print("  backgroundColor=");
                        pw.print(Integer.toHexString(taskDescription.getBackgroundColor()));
                        pw.print(" statusBarColor=");
                        pw.print(Integer.toHexString(taskDescription.getStatusBarColor()));
                        pw.print(" navigationBarColor=");
                        pw.println(Integer.toHexString(taskDescription.getNavigationBarColor()));
            }
        }
        if (results != null) {
            pw.print(prefix); pw.print("results="); pw.println(results);
        }
        if (pendingResults != null && pendingResults.size() > 0) {
            pw.print(prefix); pw.println("Pending Results:");
            for (WeakReference<PendingIntentRecord> wpir : pendingResults) {
                PendingIntentRecord pir = wpir != null ? wpir.get() : null;
                pw.print(prefix); pw.print("  - ");
                if (pir == null) {
                    pw.println("null");
                } else {
                    pw.println(pir);
                    pir.dump(pw, prefix + "    ");
                }
            }
        }
        if (newIntents != null && newIntents.size() > 0) {
            pw.print(prefix); pw.println("Pending New Intents:");
            for (int i=0; i<newIntents.size(); i++) {
                Intent intent = newIntents.get(i);
                pw.print(prefix); pw.print("  - ");
                if (intent == null) {
                    pw.println("null");
                } else {
                    pw.println(intent.toShortString(false, true, false, false));
                }
            }
        }
        if (pendingOptions != null) {
            pw.print(prefix); pw.print("pendingOptions="); pw.println(pendingOptions);
        }
        if (appTimeTracker != null) {
            appTimeTracker.dumpWithHeader(pw, prefix, false);
        }
        if (uriPermissions != null) {
            uriPermissions.dump(pw, prefix);
        }
        pw.print(prefix); pw.print("launchFailed="); pw.print(launchFailed);
                pw.print(" launchCount="); pw.print(launchCount);
                pw.print(" lastLaunchTime=");
                if (lastLaunchTime == 0) pw.print("0");
                else TimeUtils.formatDuration(lastLaunchTime, now, pw);
                pw.println();
        pw.print(prefix); pw.print("mHaveState="); pw.print(mHaveState);
                pw.print(" mIcicle="); pw.println(mIcicle);
        pw.print(prefix); pw.print("state="); pw.print(mState);
                pw.print(" stopped="); pw.print(stopped);
                pw.print(" delayedResume="); pw.print(delayedResume);
                pw.print(" finishing="); pw.println(finishing);
        pw.print(prefix); pw.print("keysPaused="); pw.print(keysPaused);
                pw.print(" inHistory="); pw.print(inHistory);
        pw.print(" setToSleep="); pw.print(mSetToSleep);
                pw.print(" idle="); pw.print(idle);
                pw.print(" mStartingWindowState=");
                pw.println(startingWindowStateToString(mStartingWindowState));
        pw.print(prefix); pw.print("occludesParent="); pw.print(occludesParent());
                pw.print(" noDisplay="); pw.print(noDisplay);
                pw.print(" immersive="); pw.print(immersive);
                pw.print(" launchMode="); pw.println(launchMode);
        pw.print(prefix); pw.print("frozenBeforeDestroy="); pw.print(frozenBeforeDestroy);
                pw.print(" forceNewConfig="); pw.println(forceNewConfig);
        pw.print(prefix); pw.print("mActivityType=");
                pw.println(activityTypeToString(getActivityType()));
        if (requestedVrComponent != null) {
            pw.print(prefix);
            pw.print("requestedVrComponent=");
            pw.println(requestedVrComponent);
        }
        super.dump(pw, prefix, dumpAll);
        if (mVoiceInteraction) {
            pw.println(prefix + "mVoiceInteraction=true");
        }
        pw.print(prefix); pw.print("mOccludesParent="); pw.print(mOccludesParent);
        pw.print(" mOrientation="); pw.println(mOrientation);
        pw.println(prefix + "mVisibleRequested=" + mVisibleRequested
                + " mVisible=" + mVisible + " mClientVisible=" + mClientVisible
                + ((mDeferHidingClient) ? " mDeferHidingClient=" + mDeferHidingClient : "")
                + " reportedDrawn=" + reportedDrawn + " reportedVisible=" + reportedVisible);
        if (paused) {
            pw.print(prefix); pw.print("paused="); pw.println(paused);
        }
        if (mAppStopped) {
            pw.print(prefix); pw.print("mAppStopped="); pw.println(mAppStopped);
        }
        if (mNumInterestingWindows != 0 || mNumDrawnWindows != 0
                || allDrawn || mLastAllDrawn) {
            pw.print(prefix); pw.print("mNumInterestingWindows=");
            pw.print(mNumInterestingWindows);
            pw.print(" mNumDrawnWindows="); pw.print(mNumDrawnWindows);
            pw.print(" allDrawn="); pw.print(allDrawn);
            pw.print(" lastAllDrawn="); pw.print(mLastAllDrawn);
            pw.println(")");
        }
        if (mStartingData != null || firstWindowDrawn || mIsExiting) {
            pw.print(prefix); pw.print("startingData="); pw.print(mStartingData);
            pw.print(" firstWindowDrawn="); pw.print(firstWindowDrawn);
            pw.print(" mIsExiting="); pw.println(mIsExiting);
        }
        if (startingWindow != null || startingSurface != null
                || startingDisplayed || startingMoved || mVisibleSetFromTransferredStartingWindow) {
            pw.print(prefix); pw.print("startingWindow="); pw.print(startingWindow);
            pw.print(" startingSurface="); pw.print(startingSurface);
            pw.print(" startingDisplayed="); pw.print(startingDisplayed);
            pw.print(" startingMoved="); pw.print(startingMoved);
            pw.println(" mHiddenSetFromTransferredStartingWindow="
                    + mVisibleSetFromTransferredStartingWindow);
        }
        if (!mFrozenBounds.isEmpty()) {
            pw.print(prefix); pw.print("mFrozenBounds="); pw.println(mFrozenBounds);
            pw.print(prefix); pw.print("mFrozenMergedConfig="); pw.println(mFrozenMergedConfig);
        }
        if (mPendingRelaunchCount != 0) {
            pw.print(prefix); pw.print("mPendingRelaunchCount="); pw.println(mPendingRelaunchCount);
        }
        if (mSizeCompatScale != 1f || mSizeCompatBounds != null) {
            pw.println(prefix + "mSizeCompatScale=" + mSizeCompatScale + " mSizeCompatBounds="
                    + mSizeCompatBounds);
        }
        if (mRemovingFromDisplay) {
            pw.println(prefix + "mRemovingFromDisplay=" + mRemovingFromDisplay);
        }
        if (lastVisibleTime != 0 || nowVisible) {
            pw.print(prefix); pw.print("nowVisible="); pw.print(nowVisible);
                    pw.print(" lastVisibleTime=");
                    if (lastVisibleTime == 0) pw.print("0");
                    else TimeUtils.formatDuration(lastVisibleTime, now, pw);
                    pw.println();
        }
        if (mDeferHidingClient) {
            pw.println(prefix + "mDeferHidingClient=" + mDeferHidingClient);
        }
        if (deferRelaunchUntilPaused || configChangeFlags != 0) {
            pw.print(prefix); pw.print("deferRelaunchUntilPaused=");
                    pw.print(deferRelaunchUntilPaused);
                    pw.print(" configChangeFlags=");
                    pw.println(Integer.toHexString(configChangeFlags));
        }
        if (mServiceConnectionsHolder != null) {
            pw.print(prefix); pw.print("connections="); pw.println(mServiceConnectionsHolder);
        }
        if (info != null) {
            pw.println(prefix + "resizeMode=" + ActivityInfo.resizeModeToString(info.resizeMode));
            pw.println(prefix + "mLastReportedMultiWindowMode=" + mLastReportedMultiWindowMode
                    + " mLastReportedPictureInPictureMode=" + mLastReportedPictureInPictureMode);
            if (info.supportsPictureInPicture()) {
                pw.println(prefix + "supportsPictureInPicture=" + info.supportsPictureInPicture());
                pw.println(prefix + "supportsEnterPipOnTaskSwitch: "
                        + supportsEnterPipOnTaskSwitch);
            }
            if (info.maxAspectRatio != 0) {
                pw.println(prefix + "maxAspectRatio=" + info.maxAspectRatio);
            }
            if (info.minAspectRatio != 0) {
                pw.println(prefix + "minAspectRatio=" + info.minAspectRatio);
            }
        }
    }

    void setAppTimeTracker(AppTimeTracker att) {
        appTimeTracker = att;
    }

    /** Update the saved state of an activity. */
    void setSavedState(@Nullable Bundle savedState) {
        mIcicle = savedState;
        mHaveState = mIcicle != null;
    }

    /**
     * Get the actual Bundle instance of the saved state.
     * @see #hasSavedState() for checking if the record has saved state.
     */
    @Nullable Bundle getSavedState() {
        return mIcicle;
    }

    /**
     * Check if the activity has saved state.
     * @return {@code true} if the client reported a non-empty saved state from last onStop(), or
     *         if this record was just created and the client is yet to be launched and resumed.
     */
    boolean hasSavedState() {
        return mHaveState;
    }

    /** @return The actual PersistableBundle instance of the saved persistent state. */
    @Nullable PersistableBundle getPersistentSavedState() {
        return mPersistentState;
    }

    void updateApplicationInfo(ApplicationInfo aInfo) {
        info.applicationInfo = aInfo;
    }

    private boolean crossesHorizontalSizeThreshold(int firstDp, int secondDp) {
        return crossesSizeThreshold(mHorizontalSizeConfigurations, firstDp, secondDp);
    }

    private boolean crossesVerticalSizeThreshold(int firstDp, int secondDp) {
        return crossesSizeThreshold(mVerticalSizeConfigurations, firstDp, secondDp);
    }

    private boolean crossesSmallestSizeThreshold(int firstDp, int secondDp) {
        return crossesSizeThreshold(mSmallestSizeConfigurations, firstDp, secondDp);
    }

    /**
     * The purpose of this method is to decide whether the activity needs to be relaunched upon
     * changing its size. In most cases the activities don't need to be relaunched, if the resize
     * is small, all the activity content has to do is relayout itself within new bounds. There are
     * cases however, where the activity's content would be completely changed in the new size and
     * the full relaunch is required.
     *
     * The activity will report to us vertical and horizontal thresholds after which a relaunch is
     * required. These thresholds are collected from the application resource qualifiers. For
     * example, if application has layout-w600dp resource directory, then it needs a relaunch when
     * we resize from width of 650dp to 550dp, as it crosses the 600dp threshold. However, if
     * it resizes width from 620dp to 700dp, it won't be relaunched as it stays on the same side
     * of the threshold.
     */
    private static boolean crossesSizeThreshold(int[] thresholds, int firstDp,
            int secondDp) {
        if (thresholds == null) {
            return false;
        }
        for (int i = thresholds.length - 1; i >= 0; i--) {
            final int threshold = thresholds[i];
            if ((firstDp < threshold && secondDp >= threshold)
                    || (firstDp >= threshold && secondDp < threshold)) {
                return true;
            }
        }
        return false;
    }

    void setSizeConfigurations(int[] horizontalSizeConfiguration,
            int[] verticalSizeConfigurations, int[] smallestSizeConfigurations) {
        mHorizontalSizeConfigurations = horizontalSizeConfiguration;
        mVerticalSizeConfigurations = verticalSizeConfigurations;
        mSmallestSizeConfigurations = smallestSizeConfigurations;
    }

    private void scheduleActivityMovedToDisplay(int displayId, Configuration config) {
        if (!attachedToProcess()) {
            if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.w(TAG,
                    "Can't report activity moved to display - client not running, activityRecord="
                            + this + ", displayId=" + displayId);
            return;
        }
        try {
            if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG,
                    "Reporting activity moved to display" + ", activityRecord=" + this
                            + ", displayId=" + displayId + ", config=" + config);

            mAtmService.getLifecycleManager().scheduleTransaction(app.getThread(), appToken,
                    MoveToDisplayItem.obtain(displayId, config));
        } catch (RemoteException e) {
            // If process died, whatever.
        }
    }

    private void scheduleConfigurationChanged(Configuration config) {
        if (!attachedToProcess()) {
            if (DEBUG_CONFIGURATION) Slog.w(TAG,
                    "Can't report activity configuration update - client not running"
                            + ", activityRecord=" + this);
            return;
        }
        try {
            if (DEBUG_CONFIGURATION) Slog.v(TAG, "Sending new config to " + this + ", config: "
                    + config);

            mAtmService.getLifecycleManager().scheduleTransaction(app.getThread(), appToken,
                    ActivityConfigurationChangeItem.obtain(config));
        } catch (RemoteException e) {
            // If process died, whatever.
        }
    }

    boolean scheduleTopResumedActivityChanged(boolean onTop) {
        if (!attachedToProcess()) {
            if (DEBUG_STATES) {
                Slog.w(TAG, "Can't report activity position update - client not running"
                                + ", activityRecord=" + this);
            }
            return false;
        }
        try {
            if (DEBUG_STATES) {
                Slog.v(TAG, "Sending position change to " + this + ", onTop: " + onTop);
            }

            mAtmService.getLifecycleManager().scheduleTransaction(app.getThread(), appToken,
                    TopResumedActivityChangeItem.obtain(onTop));
        } catch (RemoteException e) {
            // If process died, whatever.
            return false;
        }
        return true;
    }

    void updateMultiWindowMode() {
        if (task == null || task.getStack() == null || !attachedToProcess()) {
            return;
        }

        // An activity is considered to be in multi-window mode if its task isn't fullscreen.
        final boolean inMultiWindowMode = inMultiWindowMode();
        if (inMultiWindowMode != mLastReportedMultiWindowMode) {
            if (!inMultiWindowMode && mLastReportedPictureInPictureMode) {
                updatePictureInPictureMode(null, false);
            } else {
                mLastReportedMultiWindowMode = inMultiWindowMode;
                computeConfigurationAfterMultiWindowModeChange();
                // If the activity is in stopping or stopped state, for instance, it's in the
                // split screen task and not the top one, the last configuration it should keep
                // is the one before multi-window mode change.
                final ActivityState state = getState();
                if (state != STOPPED && state != STOPPING) {
                    ensureActivityConfiguration(0 /* globalChanges */, PRESERVE_WINDOWS,
                            true /* ignoreVisibility */);
                }
            }
        }
    }

    void updatePictureInPictureMode(Rect targetStackBounds, boolean forceUpdate) {
        if (task == null || task.getStack() == null || !attachedToProcess()) {
            return;
        }

        final boolean inPictureInPictureMode = inPinnedWindowingMode() && targetStackBounds != null;
        if (inPictureInPictureMode != mLastReportedPictureInPictureMode || forceUpdate) {
            // Picture-in-picture mode changes also trigger a multi-window mode change as well, so
            // update that here in order. Set the last reported MW state to the same as the PiP
            // state since we haven't yet actually resized the task (these callbacks need to
            // precede the configuration change from the resize.
            mLastReportedPictureInPictureMode = inPictureInPictureMode;
            mLastReportedMultiWindowMode = inPictureInPictureMode;
            if (targetStackBounds != null && !targetStackBounds.isEmpty()) {
                computeConfigurationAfterMultiWindowModeChange();
            }
            ensureActivityConfiguration(0 /* globalChanges */, PRESERVE_WINDOWS,
                    true /* ignoreVisibility */);
        }
    }

    private void computeConfigurationAfterMultiWindowModeChange() {
        final Configuration newConfig = new Configuration();
        newConfig.setTo(task.getRequestedOverrideConfiguration());
        Rect outBounds = newConfig.windowConfiguration.getBounds();
        final Configuration parentConfig = task.getParent().getConfiguration();
        task.adjustForMinimalTaskDimensions(outBounds, outBounds, parentConfig);
        task.computeConfigResourceOverrides(newConfig, parentConfig);
    }

    Task getTask() {
        return task;
    }

    /**
     * Sets the Task on this activity for the purposes of re-use during launch where we will
     * re-use another activity instead of this one for the launch.
     */
    void setTaskForReuse(Task task) {
        this.task = task;
    }

    ActivityStack getStack() {
        return task != null ? task.getStack() : null;
    }

    @Override
    void onParentChanged(ConfigurationContainer newParent, ConfigurationContainer oldParent) {
        final Task oldTask = oldParent != null ? (Task) oldParent : null;
        final Task newTask = newParent != null ? (Task) newParent : null;
        this.task = newTask;

        super.onParentChanged(newParent, oldParent);

        if (isPersistable()) {
            if (oldTask != null) {
                mAtmService.notifyTaskPersisterLocked(oldTask, false);
            }
            if (newTask != null) {
                mAtmService.notifyTaskPersisterLocked(newTask, false);
            }
        }

        if (oldParent == null && newParent != null) {
            // First time we are adding the activity to the system.
            mVoiceInteraction = newTask.voiceSession != null;
            mInputDispatchingTimeoutNanos = getInputDispatchingTimeoutLocked(this) * 1000000L;

            // TODO(b/36505427): Maybe this call should be moved inside
            // updateOverrideConfiguration()
            newTask.updateOverrideConfigurationFromLaunchBounds();
            // Make sure override configuration is up-to-date before using to create window
            // controller.
            updateSizeCompatMode();
            // When an activity is started directly into a split-screen fullscreen stack, we need to
            // update the initial multi-window modes so that the callbacks are scheduled correctly
            // when the user leaves that mode.
            mLastReportedMultiWindowMode = inMultiWindowMode();
            mLastReportedPictureInPictureMode = inPinnedWindowingMode();
        }

        // When the associated task is {@code null}, the {@link ActivityRecord} can no longer
        // access visual elements like the {@link DisplayContent}. We must remove any associations
        // such as animations.
        if (task == null) {
            // It is possible we have been marked as a closing app earlier. We must remove ourselves
            // from this list so we do not participate in any future animations.
            if (getDisplayContent() != null) {
                getDisplayContent().mClosingApps.remove(this);
            }
        } else if (mLastParent != null && mLastParent.getStack() != null) {
            task.getStack().mExitingActivities.remove(this);
        }
        final ActivityStack stack = getStack();

        // If we reparent, make sure to remove ourselves from the old animation registry.
        if (mAnimatingActivityRegistry != null) {
            mAnimatingActivityRegistry.notifyFinished(this);
        }
        mAnimatingActivityRegistry = stack != null
                ? stack.getAnimatingActivityRegistry()
                : null;

        mLastParent = task;

        updateColorTransform();

        if (oldTask != null) {
            oldTask.cleanUpActivityReferences(this);
        }
        if (newTask != null && isState(RESUMED)) {
            newTask.setResumedActivity(this, "onParentChanged");
        }

        if (stack != null && stack.topRunningActivity() == this) {
            // make ensure the TaskOrganizer still works after re-parenting
            if (firstWindowDrawn) {
                stack.setHasBeenVisible(true);
            }
        }
    }

    private void updateColorTransform() {
        if (mSurfaceControl != null && mLastAppSaturationInfo != null) {
            getPendingTransaction().setColorTransform(mSurfaceControl,
                    mLastAppSaturationInfo.mMatrix, mLastAppSaturationInfo.mTranslation);
            mWmService.scheduleAnimationLocked();
        }
    }

    @Override
    void onDisplayChanged(DisplayContent dc) {
        DisplayContent prevDc = mDisplayContent;
        super.onDisplayChanged(dc);
        if (prevDc == null || prevDc == mDisplayContent) {
            return;
        }

        if (prevDc.mOpeningApps.remove(this)) {
            // Transfer opening transition to new display.
            mDisplayContent.mOpeningApps.add(this);
            mDisplayContent.prepareAppTransition(prevDc.mAppTransition.getAppTransition(), true);
            mDisplayContent.executeAppTransition();
        }

        prevDc.mClosingApps.remove(this);

        if (prevDc.mFocusedApp == this) {
            prevDc.setFocusedApp(null);
            if (dc.getTopMostActivity() == this) {
                dc.setFocusedApp(this);
            }
        }

        if (mLetterbox != null) {
            mLetterbox.onMovedToDisplay(mDisplayContent.getDisplayId());
        }
    }

    void layoutLetterbox(WindowState winHint) {
        final WindowState w = findMainWindow();
        if (w == null || winHint != null && w != winHint) {
            return;
        }
        final boolean surfaceReady = w.isDrawnLw()  // Regular case
                || w.mWinAnimator.mSurfaceDestroyDeferred  // The preserved surface is still ready.
                || w.isDragResizeChanged();  // Waiting for relayoutWindow to call preserveSurface.
        final boolean needsLetterbox = surfaceReady && w.isLetterboxedAppWindow() && fillsParent();
        if (needsLetterbox) {
            if (mLetterbox == null) {
                mLetterbox = new Letterbox(() -> makeChildSurface(null),
                        mWmService.mTransactionFactory);
                mLetterbox.attachInput(w);
            }
            getPosition(mTmpPoint);
            // Get the bounds of the "space-to-fill". The transformed bounds have the highest
            // priority because the activity is launched in a rotated environment. In multi-window
            // mode, the task-level represents this. In fullscreen-mode, the task container does
            // (since the orientation letterbox is also applied to the task).
            final Rect transformedBounds = getFixedRotationTransformDisplayBounds();
            final Rect spaceToFill = transformedBounds != null
                    ? transformedBounds
                    : inMultiWindowMode()
                            ? task.getBounds()
                            : getRootTask().getParent().getBounds();
            mLetterbox.layout(spaceToFill, w.getFrameLw(), mTmpPoint);
        } else if (mLetterbox != null) {
            mLetterbox.hide();
        }
    }

    void updateLetterboxSurface(WindowState winHint) {
        final WindowState w = findMainWindow();
        if (w != winHint && winHint != null && w != null) {
            return;
        }
        layoutLetterbox(winHint);
        if (mLetterbox != null && mLetterbox.needsApplySurfaceChanges()) {
            mLetterbox.applySurfaceChanges(getPendingTransaction());
        }
    }

    Rect getLetterboxInsets() {
        if (mLetterbox != null) {
            return mLetterbox.getInsets();
        } else {
            return new Rect();
        }
    }

    /** Gets the inner bounds of letterbox. The bounds will be empty if there is no letterbox. */
    void getLetterboxInnerBounds(Rect outBounds) {
        if (mLetterbox != null) {
            outBounds.set(mLetterbox.getInnerFrame());
        } else {
            outBounds.setEmpty();
        }
    }

    /**
     * @see Letterbox#notIntersectsOrFullyContains(Rect)
     */
    boolean letterboxNotIntersectsOrFullyContains(Rect rect) {
        return mLetterbox == null || mLetterbox.notIntersectsOrFullyContains(rect);
    }

    static class Token extends IApplicationToken.Stub {
        private WeakReference<ActivityRecord> weakActivity;
        private final String name;
        private final String tokenString;

        Token(Intent intent) {
            name = intent.getComponent().flattenToShortString();
            tokenString = "Token{" + Integer.toHexString(System.identityHashCode(this)) + "}";
        }

        private void attach(ActivityRecord activity) {
            if (weakActivity != null) {
                throw new IllegalStateException("Already attached..." + this);
            }
            weakActivity = new WeakReference<>(activity);
        }

        private static @Nullable ActivityRecord tokenToActivityRecordLocked(Token token) {
            if (token == null) {
                return null;
            }
            ActivityRecord r = token.weakActivity.get();
            if (r == null || r.getRootTask() == null) {
                return null;
            }
            return r;
        }

        @Override
        public String toString() {
            StringBuilder sb = new StringBuilder(128);
            sb.append("Token{");
            sb.append(Integer.toHexString(System.identityHashCode(this)));
            sb.append(' ');
            if (weakActivity != null) {
                sb.append(weakActivity.get());
            }
            sb.append('}');
            return sb.toString();
        }

        @Override
        public String getName() {
            return name;
        }
    }

    static @Nullable ActivityRecord forTokenLocked(IBinder token) {
        try {
            return Token.tokenToActivityRecordLocked((Token)token);
        } catch (ClassCastException e) {
            Slog.w(TAG, "Bad activity token: " + token, e);
            return null;
        }
    }

    static boolean isResolverActivity(String className) {
        return ResolverActivity.class.getName().equals(className);
    }

    boolean isResolverOrDelegateActivity() {
        return isResolverActivity(mActivityComponent.getClassName()) || Objects.equals(
                mActivityComponent, mAtmService.mStackSupervisor.getSystemChooserActivity());
    }

    boolean isResolverOrChildActivity() {
        if (!"android".equals(packageName)) {
            return false;
        }
        try {
            return ResolverActivity.class.isAssignableFrom(
                    Object.class.getClassLoader().loadClass(mActivityComponent.getClassName()));
        } catch (ClassNotFoundException e) {
            return false;
        }
    }

    ActivityRecord(ActivityTaskManagerService _service, WindowProcessController _caller,
            int _launchedFromPid, int _launchedFromUid, String _launchedFromPackage,
            @Nullable String _launchedFromFeature, Intent _intent, String _resolvedType,
            ActivityInfo aInfo, Configuration _configuration, ActivityRecord _resultTo,
            String _resultWho, int _reqCode, boolean _componentSpecified,
            boolean _rootVoiceInteraction, ActivityStackSupervisor supervisor,
            ActivityOptions options, ActivityRecord sourceRecord) {
        super(_service.mWindowManager, new Token(_intent).asBinder(), TYPE_APPLICATION, true,
                null /* displayContent */, false /* ownerCanManageAppTokens */);

        mAtmService = _service;
        appToken = (Token) token;
        info = aInfo;
        mUserId = UserHandle.getUserId(info.applicationInfo.uid);
        packageName = info.applicationInfo.packageName;
        mInputApplicationHandle = new InputApplicationHandle(appToken);
        intent = _intent;

        // If the class name in the intent doesn't match that of the target, this is probably an
        // alias. We have to create a new ComponentName object to keep track of the real activity
        // name, so that FLAG_ACTIVITY_CLEAR_TOP is handled properly.
        if (info.targetActivity == null
                || (info.targetActivity.equals(intent.getComponent().getClassName())
                && (info.launchMode == LAUNCH_MULTIPLE
                || info.launchMode == LAUNCH_SINGLE_TOP))) {
            mActivityComponent = intent.getComponent();
        } else {
            mActivityComponent =
                    new ComponentName(info.packageName, info.targetActivity);
        }

        mTargetSdk = info.applicationInfo.targetSdkVersion;
        mShowForAllUsers = (info.flags & FLAG_SHOW_FOR_ALL_USERS) != 0;
        setOrientation(info.screenOrientation);
        mRotationAnimationHint = info.rotationAnimation;

        mShowWhenLocked = (aInfo.flags & ActivityInfo.FLAG_SHOW_WHEN_LOCKED) != 0;
        mInheritShownWhenLocked = (aInfo.privateFlags & FLAG_INHERIT_SHOW_WHEN_LOCKED) != 0;
        mTurnScreenOn = (aInfo.flags & FLAG_TURN_SCREEN_ON) != 0;

        int realTheme = info.getThemeResource();
        if (realTheme == Resources.ID_NULL) {
            realTheme = aInfo.applicationInfo.targetSdkVersion < HONEYCOMB
                    ? android.R.style.Theme : android.R.style.Theme_Holo;
        }

        final AttributeCache.Entry ent = AttributeCache.instance().get(packageName,
                realTheme, com.android.internal.R.styleable.Window, mUserId);

        if (ent != null) {
            mOccludesParent = !ActivityInfo.isTranslucentOrFloating(ent.array);
            hasWallpaper = ent.array.getBoolean(R.styleable.Window_windowShowWallpaper, false);
            noDisplay = ent.array.getBoolean(R.styleable.Window_windowNoDisplay, false);
        } else {
            hasWallpaper = false;
            noDisplay = false;
        }

        if (options != null) {
            mLaunchTaskBehind = options.getLaunchTaskBehind();

            final int rotationAnimation = options.getRotationAnimationHint();
            // Only override manifest supplied option if set.
            if (rotationAnimation >= 0) {
                mRotationAnimationHint = rotationAnimation;
            }
        }

        // Application tokens start out hidden.
        setVisible(false);
        mVisibleRequested = false;

        ColorDisplayService.ColorDisplayServiceInternal cds = LocalServices.getService(
                ColorDisplayService.ColorDisplayServiceInternal.class);
        cds.attachColorTransformController(packageName, mUserId,
                new WeakReference<>(mColorTransformController));

        appToken.attach(this);

        mRootWindowContainer = _service.mRootWindowContainer;
        launchedFromPid = _launchedFromPid;
        launchedFromUid = _launchedFromUid;
        launchedFromPackage = _launchedFromPackage;
        launchedFromFeatureId = _launchedFromFeature;
        shortComponentName = _intent.getComponent().flattenToShortString();
        resolvedType = _resolvedType;
        componentSpecified = _componentSpecified;
        rootVoiceInteraction = _rootVoiceInteraction;
        mLastReportedConfiguration = new MergedConfiguration(_configuration);
        resultTo = _resultTo;
        resultWho = _resultWho;
        requestCode = _reqCode;
        setState(INITIALIZING, "ActivityRecord ctor");
        launchFailed = false;
        stopped = false;
        delayedResume = false;
        finishing = false;
        deferRelaunchUntilPaused = false;
        keysPaused = false;
        inHistory = false;
        nowVisible = false;
        mDrawn = false;
        mClientVisible = true;
        idle = false;
        hasBeenLaunched = false;
        mStackSupervisor = supervisor;

        info.taskAffinity = getTaskAffinityWithUid(info.taskAffinity, info.applicationInfo.uid);
        taskAffinity = info.taskAffinity;
        final String uid = Integer.toString(info.applicationInfo.uid);
        if (info.windowLayout != null && info.windowLayout.windowLayoutAffinity != null
                && !info.windowLayout.windowLayoutAffinity.startsWith(uid)) {
            info.windowLayout.windowLayoutAffinity =
                    uid + ":" + info.windowLayout.windowLayoutAffinity;
        }
        stateNotNeeded = (aInfo.flags & FLAG_STATE_NOT_NEEDED) != 0;
        nonLocalizedLabel = aInfo.nonLocalizedLabel;
        labelRes = aInfo.labelRes;
        if (nonLocalizedLabel == null && labelRes == 0) {
            ApplicationInfo app = aInfo.applicationInfo;
            nonLocalizedLabel = app.nonLocalizedLabel;
            labelRes = app.labelRes;
        }
        icon = aInfo.getIconResource();
        logo = aInfo.getLogoResource();
        theme = aInfo.getThemeResource();
        if ((aInfo.flags & ActivityInfo.FLAG_HARDWARE_ACCELERATED) != 0) {
            windowFlags |= LayoutParams.FLAG_HARDWARE_ACCELERATED;
        }
        if ((aInfo.flags & FLAG_MULTIPROCESS) != 0 && _caller != null
                && (aInfo.applicationInfo.uid == SYSTEM_UID
                    || aInfo.applicationInfo.uid == _caller.mInfo.uid)) {
            processName = _caller.mName;
        } else {
            processName = aInfo.processName;
        }

        if ((aInfo.flags & FLAG_EXCLUDE_FROM_RECENTS) != 0) {
            intent.addFlags(FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
        }

        launchMode = aInfo.launchMode;

        setActivityType(_componentSpecified, _launchedFromUid, _intent, options, sourceRecord);

        immersive = (aInfo.flags & FLAG_IMMERSIVE) != 0;

        requestedVrComponent = (aInfo.requestedVrComponent == null) ?
                null : ComponentName.unflattenFromString(aInfo.requestedVrComponent);

        lockTaskLaunchMode = getLockTaskLaunchMode(aInfo, options);

        if (options != null) {
            pendingOptions = options;
            final PendingIntent usageReport = pendingOptions.getUsageTimeReport();
            if (usageReport != null) {
                appTimeTracker = new AppTimeTracker(usageReport);
            }
            // Gets launch task display area and display id from options. Returns
            // null/INVALID_DISPLAY if not set.
            final WindowContainerToken daToken = options.getLaunchTaskDisplayArea();
            mHandoverTaskDisplayArea = daToken != null
                    ? (TaskDisplayArea) WindowContainer.fromBinder(daToken.asBinder()) : null;
            mHandoverLaunchDisplayId = options.getLaunchDisplayId();
        }
    }

    /**
     * Generate the task affinity with uid. For b/35954083, Limit task affinity to uid to avoid
     * issues associated with sharing affinity across uids.
     *
     * @param affinity The affinity of the activity.
     * @param uid The user-ID that has been assigned to this application.
     * @return The task affinity with uid.
     */
    static String getTaskAffinityWithUid(String affinity, int uid) {
        final String uidStr = Integer.toString(uid);
        if (affinity != null && !affinity.startsWith(uidStr)) {
            affinity = uidStr + ":" + affinity;
        }
        return affinity;
    }

    static int getLockTaskLaunchMode(ActivityInfo aInfo, @Nullable ActivityOptions options) {
        int lockTaskLaunchMode = aInfo.lockTaskLaunchMode;
        if (aInfo.applicationInfo.isPrivilegedApp()
                && (lockTaskLaunchMode == LOCK_TASK_LAUNCH_MODE_ALWAYS
                || lockTaskLaunchMode == LOCK_TASK_LAUNCH_MODE_NEVER)) {
            lockTaskLaunchMode = LOCK_TASK_LAUNCH_MODE_DEFAULT;
        }
        if (options != null) {
            final boolean useLockTask = options.getLockTaskMode();
            if (useLockTask && lockTaskLaunchMode == LOCK_TASK_LAUNCH_MODE_DEFAULT) {
                lockTaskLaunchMode = LOCK_TASK_LAUNCH_MODE_IF_WHITELISTED;
            }
        }
        return lockTaskLaunchMode;
    }

    @Override
    ActivityRecord asActivityRecord() {
        // I am an activity record!
        return this;
    }

    @Override
    boolean hasActivity() {
        // I am an activity!
        return true;
    }

    void setProcess(WindowProcessController proc) {
        app = proc;
        final ActivityRecord root = task != null ? task.getRootActivity() : null;
        if (root == this) {
            task.setRootProcess(proc);
        }
        proc.addActivityIfNeeded(this);
    }

    boolean hasProcess() {
        return app != null;
    }

    boolean attachedToProcess() {
        return hasProcess() && app.hasThread();
    }

    boolean addStartingWindow(String pkg, int theme, CompatibilityInfo compatInfo,
            CharSequence nonLocalizedLabel, int labelRes, int icon, int logo, int windowFlags,
            IBinder transferFrom, boolean newTask, boolean taskSwitch, boolean processRunning,
            boolean allowTaskSnapshot, boolean activityCreated) {
        // If the display is frozen, we won't do anything until the actual window is
        // displayed so there is no reason to put in the starting window.
        if (!okToDisplay()) {
            return false;
        }

        if (mStartingData != null) {
            return false;
        }

        final WindowState mainWin = findMainWindow();
        if (mainWin != null && mainWin.mWinAnimator.getShown()) {
            // App already has a visible window...why would you want a starting window?
            return false;
        }

        final ActivityManager.TaskSnapshot snapshot =
                mWmService.mTaskSnapshotController.getSnapshot(task.mTaskId, task.mUserId,
                        false /* restoreFromDisk */, false /* isLowResolution */);
        final int type = getStartingWindowType(newTask, taskSwitch, processRunning,
                allowTaskSnapshot, activityCreated, snapshot);

        if (type == STARTING_WINDOW_TYPE_SNAPSHOT) {
            if (isActivityTypeHome()) {
                // The snapshot of home is only used once because it won't be updated while screen
                // is on (see {@link TaskSnapshotController#screenTurningOff}).
                mWmService.mTaskSnapshotController.removeSnapshotCache(task.mTaskId);
                if ((mDisplayContent.mAppTransition.getTransitFlags()
                        & WindowManager.TRANSIT_FLAG_KEYGUARD_GOING_AWAY_NO_ANIMATION) == 0) {
                    // Only use snapshot of home as starting window when unlocking directly.
                    return false;
                }
            }
            return createSnapshot(snapshot);
        }

        // If this is a translucent window, then don't show a starting window -- the current
        // effect (a full-screen opaque starting window that fades away to the real contents
        // when it is ready) does not work for this.
        ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Checking theme of starting window: 0x%x", theme);
        if (theme != 0) {
            AttributeCache.Entry ent = AttributeCache.instance().get(pkg, theme,
                    com.android.internal.R.styleable.Window,
                    mWmService.mCurrentUserId);
            if (ent == null) {
                // Whoops!  App doesn't exist. Um. Okay. We'll just pretend like we didn't
                // see that.
                return false;
            }
            final boolean windowIsTranslucent = ent.array.getBoolean(
                    com.android.internal.R.styleable.Window_windowIsTranslucent, false);
            final boolean windowIsFloating = ent.array.getBoolean(
                    com.android.internal.R.styleable.Window_windowIsFloating, false);
            final boolean windowShowWallpaper = ent.array.getBoolean(
                    com.android.internal.R.styleable.Window_windowShowWallpaper, false);
            final boolean windowDisableStarting = ent.array.getBoolean(
                    com.android.internal.R.styleable.Window_windowDisablePreview, false);
            ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Translucent=%s Floating=%s ShowWallpaper=%s",
                    windowIsTranslucent, windowIsFloating, windowShowWallpaper);
            if (windowIsTranslucent) {
                return false;
            }
            if (windowIsFloating || windowDisableStarting) {
                return false;
            }
            if (windowShowWallpaper) {
                if (getDisplayContent().mWallpaperController
                        .getWallpaperTarget() == null) {
                    // If this theme is requesting a wallpaper, and the wallpaper
                    // is not currently visible, then this effectively serves as
                    // an opaque window and our starting window transition animation
                    // can still work.  We just need to make sure the starting window
                    // is also showing the wallpaper.
                    windowFlags |= FLAG_SHOW_WALLPAPER;
                } else {
                    return false;
                }
            }
        }

        if (transferStartingWindow(transferFrom)) {
            return true;
        }

        // There is no existing starting window, and we don't want to create a splash screen, so
        // that's it!
        if (type != STARTING_WINDOW_TYPE_SPLASH_SCREEN) {
            return false;
        }

        ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Creating SplashScreenStartingData");
        mStartingData = new SplashScreenStartingData(mWmService, pkg,
                theme, compatInfo, nonLocalizedLabel, labelRes, icon, logo, windowFlags,
                getMergedOverrideConfiguration());
        scheduleAddStartingWindow();
        return true;
    }

    private boolean createSnapshot(ActivityManager.TaskSnapshot snapshot) {
        if (snapshot == null) {
            return false;
        }

        ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Creating SnapshotStartingData");
        mStartingData = new SnapshotStartingData(mWmService, snapshot);
        scheduleAddStartingWindow();
        return true;
    }

    void scheduleAddStartingWindow() {
        // Note: we really want to do sendMessageAtFrontOfQueue() because we
        // want to process the message ASAP, before any other queued
        // messages.
        if (!mWmService.mAnimationHandler.hasCallbacks(mAddStartingWindow)) {
            ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Enqueueing ADD_STARTING");
            mWmService.mAnimationHandler.postAtFrontOfQueue(mAddStartingWindow);
        }
    }

    private class AddStartingWindow implements Runnable {

        @Override
        public void run() {
            // Can be accessed without holding the global lock
            final StartingData startingData;
            synchronized (mWmService.mGlobalLock) {
                // There can only be one adding request, silly caller!
                mWmService.mAnimationHandler.removeCallbacks(this);

                if (mStartingData == null) {
                    // Animation has been canceled... do nothing.
                    ProtoLog.v(WM_DEBUG_STARTING_WINDOW,
                            "startingData was nulled out before handling"
                                    + " mAddStartingWindow: %s", ActivityRecord.this);
                    return;
                }
                startingData = mStartingData;
            }

            ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Add starting %s: startingData=%s",
                    this, startingData);


            WindowManagerPolicy.StartingSurface surface = null;
            try {
                surface = startingData.createStartingSurface(ActivityRecord.this);
            } catch (Exception e) {
                Slog.w(TAG, "Exception when adding starting window", e);
            }
            if (surface != null) {
                boolean abort = false;
                synchronized (mWmService.mGlobalLock) {
                    // If the window was successfully added, then we need to remove it.
                    if (mStartingData == null) {
                        ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Aborted starting %s: startingData=%s",
                                ActivityRecord.this, mStartingData);

                        startingWindow = null;
                        mStartingData = null;
                        abort = true;
                    } else {
                        startingSurface = surface;
                    }
                    if (!abort) {
                        ProtoLog.v(WM_DEBUG_STARTING_WINDOW,
                                "Added starting %s: startingWindow=%s startingView=%s",
                                ActivityRecord.this, startingWindow, startingSurface);
                    }
                }
                if (abort) {
                    surface.remove();
                }
            } else {
                ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Surface returned was null: %s",
                        ActivityRecord.this);
            }
        }
    }

    private final AddStartingWindow mAddStartingWindow = new AddStartingWindow();

    private int getStartingWindowType(boolean newTask, boolean taskSwitch, boolean processRunning,
            boolean allowTaskSnapshot, boolean activityCreated,
            ActivityManager.TaskSnapshot snapshot) {
        if (newTask || !processRunning || (taskSwitch && !activityCreated)) {
            return STARTING_WINDOW_TYPE_SPLASH_SCREEN;
        } else if (taskSwitch && allowTaskSnapshot) {
            if (isSnapshotCompatible(snapshot)) {
                return STARTING_WINDOW_TYPE_SNAPSHOT;
            }
            if (!isActivityTypeHome()) {
                return STARTING_WINDOW_TYPE_SPLASH_SCREEN;
            }
            return STARTING_WINDOW_TYPE_NONE;
        } else {
            return STARTING_WINDOW_TYPE_NONE;
        }
    }

    /**
     * Returns {@code true} if the task snapshot is compatible with this activity (at least the
     * rotation must be the same).
     */
    @VisibleForTesting
    boolean isSnapshotCompatible(ActivityManager.TaskSnapshot snapshot) {
        if (snapshot == null) {
            return false;
        }
        final int rotation = mDisplayContent.rotationForActivityInDifferentOrientation(this);
        final int targetRotation = rotation != ROTATION_UNDEFINED
                // The display may rotate according to the orientation of this activity.
                ? rotation
                // The activity won't change display orientation.
                : task.getWindowConfiguration().getRotation();
        return snapshot.getRotation() == targetRotation;
    }

    void removeStartingWindow() {
        if (startingWindow == null) {
            if (mStartingData != null) {
                // Starting window has not been added yet, but it is scheduled to be added.
                // Go ahead and cancel the request.
                ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Clearing startingData for token=%s", this);
                mStartingData = null;
            }
            return;
        }

        final WindowManagerPolicy.StartingSurface surface;
        if (mStartingData != null) {
            surface = startingSurface;
            mStartingData = null;
            startingSurface = null;
            startingWindow = null;
            if (surface == null) {
                ProtoLog.v(WM_DEBUG_STARTING_WINDOW,
                        "startingWindow was set but startingSurface==null, couldn't "
                                + "remove");

                return;
            }
        } else {
            ProtoLog.v(WM_DEBUG_STARTING_WINDOW,
                    "Tried to remove starting window but startingWindow was null: %s",
                    this);
            return;
        }

        ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Schedule remove starting %s startingWindow=%s"
                        + " startingView=%s Callers=%s",
                this, startingWindow, startingSurface, Debug.getCallers(5));


        // Use the same thread to remove the window as we used to add it, as otherwise we end up
        // with things in the view hierarchy being called from different threads.
        mWmService.mAnimationHandler.post(() -> {
            ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Removing startingView=%s", surface);
            try {
                surface.remove();
            } catch (Exception e) {
                Slog.w(TAG_WM, "Exception when removing starting window", e);
            }
        });
    }

    private void removeAppTokenFromDisplay() {
        if (mWmService.mRoot == null) return;

        final DisplayContent dc = mWmService.mRoot.getDisplayContent(getDisplayId());
        if (dc == null) {
            Slog.w(TAG, "removeAppTokenFromDisplay: Attempted to remove token: "
                    + appToken + " from non-existing displayId=" + getDisplayId());
            return;
        }
        // Resume key dispatching if it is currently paused before we remove the container.
        resumeKeyDispatchingLocked();
        dc.removeAppToken(appToken.asBinder());
    }

    /**
     * Reparents this activity into {@param newTask} at the provided {@param position}.  The caller
     * should ensure that the {@param newTask} is not already the parent of this activity.
     */
    void reparent(Task newTask, int position, String reason) {
        if (getParent() == null) {
            Slog.w(TAG, "reparent: Attempted to reparent non-existing app token: " + appToken);
            return;
        }
        final Task prevTask = task;
        if (prevTask == newTask) {
            throw new IllegalArgumentException(reason + ": task=" + newTask
                    + " is already the parent of r=" + this);
        }

        ProtoLog.i(WM_DEBUG_ADD_REMOVE, "reparent: moving activity=%s"
                + " to task=%d at %d", this, task.mTaskId, position);
        reparent(newTask, position);
    }

    private boolean isHomeIntent(Intent intent) {
        return ACTION_MAIN.equals(intent.getAction())
                && (intent.hasCategory(CATEGORY_HOME)
                || intent.hasCategory(CATEGORY_SECONDARY_HOME))
                && intent.getCategories().size() == 1
                && intent.getData() == null
                && intent.getType() == null;
    }

    static boolean isMainIntent(Intent intent) {
        return ACTION_MAIN.equals(intent.getAction())
                && intent.hasCategory(CATEGORY_LAUNCHER)
                && intent.getCategories().size() == 1
                && intent.getData() == null
                && intent.getType() == null;
    }

    @VisibleForTesting
    boolean canLaunchHomeActivity(int uid, ActivityRecord sourceRecord) {
        if (uid == Process.myUid() || uid == 0) {
            // System process can launch home activity.
            return true;
        }
        // Allow the recents component to launch the home activity.
        final RecentTasks recentTasks = mStackSupervisor.mService.getRecentTasks();
        if (recentTasks != null && recentTasks.isCallerRecents(uid)) {
            return true;
        }
        // Resolver or system chooser activity can launch home activity.
        return sourceRecord != null && sourceRecord.isResolverOrDelegateActivity();
    }

    /**
     * @return whether the given package name can launch an assist activity.
     */
    private boolean canLaunchAssistActivity(String packageName) {
        final ComponentName assistComponent =
                mAtmService.mActiveVoiceInteractionServiceComponent;
        if (assistComponent != null) {
            return assistComponent.getPackageName().equals(packageName);
        }
        return false;
    }

    static boolean canLaunchDreamActivity(String packageName) {
        final DreamManagerInternal dreamManager =
                LocalServices.getService(DreamManagerInternal.class);

        // Verify that the package is the current active dream. The getActiveDreamComponent()
        // call path does not acquire the DreamManager lock and thus is safe to use.
        final ComponentName activeDream = dreamManager.getActiveDreamComponent(false /* doze */);
        if (activeDream == null || activeDream.getPackageName() == null
                || !activeDream.getPackageName().equals(packageName)) {
            return false;
        }

        // Verify that the device is dreaming.
        if (!LocalServices.getService(ActivityTaskManagerInternal.class).isDreaming()) {
            return false;
        }

        return true;
    }

    private void setActivityType(boolean componentSpecified, int launchedFromUid, Intent intent,
            ActivityOptions options, ActivityRecord sourceRecord) {
        int activityType = ACTIVITY_TYPE_UNDEFINED;
        if ((!componentSpecified || canLaunchHomeActivity(launchedFromUid, sourceRecord))
                && isHomeIntent(intent) && !isResolverOrDelegateActivity()) {
            // This sure looks like a home activity!
            activityType = ACTIVITY_TYPE_HOME;

            if (info.resizeMode == RESIZE_MODE_FORCE_RESIZEABLE
                    || info.resizeMode == RESIZE_MODE_RESIZEABLE_VIA_SDK_VERSION) {
                // We only allow home activities to be resizeable if they explicitly requested it.
                info.resizeMode = RESIZE_MODE_UNRESIZEABLE;
            }
        } else if (mAtmService.getRecentTasks().isRecentsComponent(mActivityComponent,
                info.applicationInfo.uid)) {
            activityType = ACTIVITY_TYPE_RECENTS;
        } else if (options != null && options.getLaunchActivityType() == ACTIVITY_TYPE_ASSISTANT
                && canLaunchAssistActivity(launchedFromPackage)) {
            activityType = ACTIVITY_TYPE_ASSISTANT;
        } else if (options != null && options.getLaunchActivityType() == ACTIVITY_TYPE_DREAM
                && canLaunchDreamActivity(launchedFromPackage)
                && DreamActivity.class.getName() == info.name) {
            activityType = ACTIVITY_TYPE_DREAM;
        }
        setActivityType(activityType);
    }

    void setTaskToAffiliateWith(Task taskToAffiliateWith) {
        if (launchMode != LAUNCH_SINGLE_INSTANCE && launchMode != LAUNCH_SINGLE_TASK) {
            task.setTaskToAffiliateWith(taskToAffiliateWith);
        }
    }

    /** @return Root task of this activity, null if there is no task. */
    ActivityStack getRootTask() {
        return task != null ? (ActivityStack) task.getRootTask() : null;
    }

    int getRootTaskId() {
        return task != null ? task.getRootTaskId() : INVALID_TASK_ID;
    }

    DisplayContent getDisplay() {
        final ActivityStack stack = getRootTask();
        return stack != null ? stack.getDisplay() : null;
    }

    @Override
    @Nullable
    TaskDisplayArea getDisplayArea() {
        return (TaskDisplayArea) super.getDisplayArea();
    }

    @Override
    boolean fillsParent() {
        return occludesParent(true /* includingFinishing */);
    }

    /** Returns true if this activity is not finishing, is opaque and fills the entire space of
     * this task. */
    boolean occludesParent() {
        return occludesParent(false /* includingFinishing */);
    }

    private boolean occludesParent(boolean includingFinishing) {
        if (!includingFinishing && finishing) {
            return false;
        }
        return mOccludesParent;
    }

    boolean setOccludesParent(boolean occludesParent) {
        final boolean changed = occludesParent != mOccludesParent;
        mOccludesParent = occludesParent;
        setMainWindowOpaque(occludesParent);
        mWmService.mWindowPlacerLocked.requestTraversal();

        if (changed && task != null && !occludesParent) {
            getRootTask().convertActivityToTranslucent(this);
        }
        // Always ensure visibility if this activity doesn't occlude parent, so the
        // {@link #returningOptions} of the activity under this one can be applied in
        // {@link #handleAlreadyVisible()}.
        if (changed || !occludesParent) {
            mRootWindowContainer.ensureActivitiesVisible(null, 0, !PRESERVE_WINDOWS);
        }
        return changed;
    }

    void setMainWindowOpaque(boolean isOpaque) {
        final WindowState win = findMainWindow();
        if (win == null) {
            return;
        }
        isOpaque = isOpaque & !PixelFormat.formatHasAlpha(win.getAttrs().format);
        win.mWinAnimator.setOpaqueLocked(isOpaque);
    }

    void takeFromHistory() {
        if (inHistory) {
            inHistory = false;
            if (task != null && !finishing) {
                task = null;
            }
            clearOptionsLocked();
        }
    }

    boolean isInHistory() {
        return inHistory;
    }

    boolean isInStackLocked() {
        final ActivityStack stack = getRootTask();
        return stack != null && stack.isInTask(this) != null;
    }

    boolean isPersistable() {
        return (info.persistableMode == PERSIST_ROOT_ONLY ||
                info.persistableMode == PERSIST_ACROSS_REBOOTS) &&
                (intent == null || (intent.getFlags() & FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS) == 0);
    }

    @Override
    boolean isFocusable() {
        // TODO(156521483): Propagate the state down the hierarchy instead of checking the parent
        boolean canReceiveKeys = getWindowConfiguration().canReceiveKeys()
                && getTask().getWindowConfiguration().canReceiveKeys();
        return super.isFocusable() && (canReceiveKeys || isAlwaysFocusable());
    }

    boolean isResizeable() {
        return ActivityInfo.isResizeableMode(info.resizeMode) || info.supportsPictureInPicture();
    }

    /** @return whether this activity is non-resizeable or forced to be resizeable */
    boolean isNonResizableOrForcedResizable(int windowingMode) {
        if (windowingMode == WINDOWING_MODE_PINNED && info.supportsPictureInPicture()) {
            return false;
        }
        return info.resizeMode != RESIZE_MODE_RESIZEABLE
                && info.resizeMode != RESIZE_MODE_RESIZEABLE_VIA_SDK_VERSION;
    }

    /**
     * @return whether this activity supports PiP multi-window and can be put in the pinned stack.
     */
    boolean supportsPictureInPicture() {
        return mAtmService.mSupportsPictureInPicture && isActivityTypeStandardOrUndefined()
                && info.supportsPictureInPicture();
    }

    /**
     * @return whether this activity supports split-screen multi-window and can be put in the docked
     *         stack.
     */
    @Override
    public boolean supportsSplitScreenWindowingMode() {
        // An activity can not be docked even if it is considered resizeable because it only
        // supports picture-in-picture mode but has a non-resizeable resizeMode
        return super.supportsSplitScreenWindowingMode()
                && mAtmService.mSupportsSplitScreenMultiWindow && supportsResizeableMultiWindow();
    }

    /**
     * @return whether this activity supports freeform multi-window and can be put in the freeform
     *         stack.
     */
    boolean supportsFreeform() {
        return mAtmService.mSupportsFreeformWindowManagement && supportsResizeableMultiWindow();
    }

    /**
     * @return whether this activity supports non-PiP multi-window.
     */
    private boolean supportsResizeableMultiWindow() {
        return mAtmService.mSupportsMultiWindow && !isActivityTypeHome()
                && (ActivityInfo.isResizeableMode(info.resizeMode)
                        || mAtmService.mForceResizableActivities);
    }

    /**
     * Check whether this activity can be launched on the specified display.
     *
     * @param displayId Target display id.
     * @return {@code true} if either it is the default display or this activity can be put on a
     *         secondary screen.
     */
    boolean canBeLaunchedOnDisplay(int displayId) {
        return mAtmService.mStackSupervisor.canPlaceEntityOnDisplay(displayId, launchedFromPid,
                launchedFromUid, info);
    }

    /**
     * @param beforeStopping Whether this check is for an auto-enter-pip operation, that is to say
     *         the activity has requested to enter PiP when it would otherwise be stopped.
     *
     * @return whether this activity is currently allowed to enter PIP.
     */
    boolean checkEnterPictureInPictureState(String caller, boolean beforeStopping) {
        if (!supportsPictureInPicture()) {
            return false;
        }

        // Check app-ops and see if PiP is supported for this package
        if (!checkEnterPictureInPictureAppOpsState()) {
            return false;
        }

        // Check to see if we are in VR mode, and disallow PiP if so
        if (mAtmService.shouldDisableNonVrUiLocked()) {
            return false;
        }

        boolean isKeyguardLocked = mAtmService.isKeyguardLocked();
        boolean isCurrentAppLocked =
                mAtmService.getLockTaskModeState() != LOCK_TASK_MODE_NONE;
        final TaskDisplayArea taskDisplayArea = getDisplayArea();
        boolean hasPinnedStack = taskDisplayArea != null && taskDisplayArea.hasPinnedTask();
        // Don't return early if !isNotLocked, since we want to throw an exception if the activity
        // is in an incorrect state
        boolean isNotLockedOrOnKeyguard = !isKeyguardLocked && !isCurrentAppLocked;

        // We don't allow auto-PiP when something else is already pipped.
        if (beforeStopping && hasPinnedStack) {
            return false;
        }

        switch (mState) {
            case RESUMED:
                // When visible, allow entering PiP if the app is not locked.  If it is over the
                // keyguard, then we will prompt to unlock in the caller before entering PiP.
                return !isCurrentAppLocked &&
                        (supportsEnterPipOnTaskSwitch || !beforeStopping);
            case PAUSING:
            case PAUSED:
                // When pausing, then only allow enter PiP as in the resume state, and in addition,
                // require that there is not an existing PiP activity and that the current system
                // state supports entering PiP
                return isNotLockedOrOnKeyguard && !hasPinnedStack
                        && supportsEnterPipOnTaskSwitch;
            case STOPPING:
                // When stopping in a valid state, then only allow enter PiP as in the pause state.
                // Otherwise, fall through to throw an exception if the caller is trying to enter
                // PiP in an invalid stopping state.
                if (supportsEnterPipOnTaskSwitch) {
                    return isNotLockedOrOnKeyguard && !hasPinnedStack;
                }
            default:
                return false;
        }
    }

    /**
     * Sets if this {@link ActivityRecord} is in the process of closing or entering PIP.
     * {@link #mWillCloseOrEnterPip}}
     */
    void setWillCloseOrEnterPip(boolean willCloseOrEnterPip) {
        mWillCloseOrEnterPip = willCloseOrEnterPip;
    }

    /**
     * Returns whether this {@link ActivityRecord} is considered closing. Conditions are either
     * 1. Is this app animating and was requested to be hidden
     * 2. App is delayed closing since it might enter PIP.
     */
    boolean isClosingOrEnteringPip() {
        return (isAnimating(TRANSITION | PARENTS) && !mVisibleRequested) || mWillCloseOrEnterPip;
    }
    /**
     * @return Whether AppOps allows this package to enter picture-in-picture.
     */
    private boolean checkEnterPictureInPictureAppOpsState() {
        return mAtmService.getAppOpsManager().checkOpNoThrow(
                OP_PICTURE_IN_PICTURE, info.applicationInfo.uid, packageName) == MODE_ALLOWED;
    }

    private boolean isAlwaysFocusable() {
        return (info.flags & FLAG_ALWAYS_FOCUSABLE) != 0;
    }

    boolean windowsAreFocusable() {
        return windowsAreFocusable(false /* fromUserTouch */);
    }

    // TODO: Does this really need to be different from isAlwaysFocusable()? For the activity side
    // focusable means resumeable. I guess with that in mind maybe we should rename the other
    // method to isResumeable() or something like that.
    boolean windowsAreFocusable(boolean fromUserTouch) {
        if (!fromUserTouch && mTargetSdk < Build.VERSION_CODES.Q) {
            final int pid = getPid();
            final ActivityRecord topFocusedAppOfMyProcess =
                    mWmService.mRoot.mTopFocusedAppByProcess.get(pid);
            if (topFocusedAppOfMyProcess != null && topFocusedAppOfMyProcess != this) {
                // For the apps below Q, there can be only one app which has the focused window per
                // process, because legacy apps may not be ready for a multi-focus system.
                return false;
            }
        }
        return (getWindowConfiguration().canReceiveKeys() || isAlwaysFocusable())
                && getDisplay() != null;
    }

    /**
     * Move activity with its stack to front and make the stack focused.
     * @param reason the reason to move to top
     * @return {@code true} if the stack is focusable and has been moved to top or the activity
     *         is not yet resumed while the stack is already on top, {@code false} otherwise.
     */
    boolean moveFocusableActivityToTop(String reason) {
        if (!isFocusable()) {
            if (DEBUG_FOCUS) {
                Slog.d(TAG_FOCUS, "moveActivityStackToFront: unfocusable activity=" + this);
            }
            return false;
        }

        final ActivityStack stack = getRootTask();
        if (stack == null) {
            Slog.w(TAG, "moveActivityStackToFront: invalid task or stack: activity="
                    + this + " task=" + task);
            return false;
        }

        if (mRootWindowContainer.getTopResumedActivity() == this
                && getDisplayContent().mFocusedApp == this) {
            if (DEBUG_FOCUS) {
                Slog.d(TAG_FOCUS, "moveActivityStackToFront: already on top, activity=" + this);
            }
            return !isState(RESUMED);
        }

        if (DEBUG_FOCUS) {
            Slog.d(TAG_FOCUS, "moveActivityStackToFront: activity=" + this);
        }

        stack.moveToFront(reason, task);
        // Report top activity change to tracking services and WM
        if (mRootWindowContainer.getTopResumedActivity() == this) {
            mAtmService.setResumedActivityUncheckLocked(this, reason);
        }
        return true;
    }

    void finishIfSubActivity(ActivityRecord parent, String otherResultWho, int otherRequestCode) {
        if (resultTo != parent
                || requestCode != otherRequestCode
                || !Objects.equals(resultWho, otherResultWho)) return;

        finishIfPossible("request-sub", false /* oomAdj */);
    }

    /** Finish all activities in the task with the same affinity as this one. */
    boolean finishIfSameAffinity(ActivityRecord r) {
        // End search once we get to the activity that doesn't have the same affinity.
        if (!Objects.equals(r.taskAffinity, taskAffinity)) return true;

        r.finishIfPossible("request-affinity", true /* oomAdj */);
        return false;
    }

    /**
     * Sets the result for activity that started this one, clears the references to activities
     * started for result from this one, and clears new intents.
     */
    private void finishActivityResults(int resultCode, Intent resultData) {
        // Send the result if needed
        if (resultTo != null) {
            if (DEBUG_RESULTS) {
                Slog.v(TAG_RESULTS, "Adding result to " + resultTo
                        + " who=" + resultWho + " req=" + requestCode
                        + " res=" + resultCode + " data=" + resultData);
            }
            if (resultTo.mUserId != mUserId) {
                if (resultData != null) {
                    resultData.prepareToLeaveUser(mUserId);
                }
            }
            if (info.applicationInfo.uid > 0) {
                mAtmService.mUgmInternal.grantUriPermissionFromIntent(info.applicationInfo.uid,
                        resultTo.packageName, resultData,
                        resultTo.getUriPermissionsLocked(), resultTo.mUserId);
            }
            resultTo.addResultLocked(this, resultWho, requestCode, resultCode, resultData);
            resultTo = null;
        } else if (DEBUG_RESULTS) {
            Slog.v(TAG_RESULTS, "No result destination from " + this);
        }

        // Make sure this HistoryRecord is not holding on to other resources,
        // because clients have remote IPC references to this object so we
        // can't assume that will go away and want to avoid circular IPC refs.
        results = null;
        pendingResults = null;
        newIntents = null;
        setSavedState(null /* savedState */);
    }

    /** Activity finish request was not executed. */
    static final int FINISH_RESULT_CANCELLED = 0;
    /** Activity finish was requested, activity will be fully removed later. */
    static final int FINISH_RESULT_REQUESTED = 1;
    /** Activity finish was requested, activity was removed from history. */
    static final int FINISH_RESULT_REMOVED = 2;

    /** Definition of possible results for activity finish request. */
    @IntDef(prefix = { "FINISH_RESULT_" }, value = {
            FINISH_RESULT_CANCELLED,
            FINISH_RESULT_REQUESTED,
            FINISH_RESULT_REMOVED,
    })
    @interface FinishRequest {}

    /**
     * See {@link #finishIfPossible(int, Intent, String, boolean)}
     */
    @FinishRequest int finishIfPossible(String reason, boolean oomAdj) {
        return finishIfPossible(Activity.RESULT_CANCELED, null /* resultData */, reason, oomAdj);
    }

    /**
     * Finish activity if possible. If activity was resumed - we must first pause it to make the
     * activity below resumed. Otherwise we will try to complete the request immediately by calling
     * {@link #completeFinishing(String)}.
     * @return One of {@link FinishRequest} values:
     * {@link #FINISH_RESULT_REMOVED} if this activity has been removed from the history list.
     * {@link #FINISH_RESULT_REQUESTED} if removal process was started, but it is still in the list
     * and will be removed from history later.
     * {@link #FINISH_RESULT_CANCELLED} if activity is already finishing or in invalid state and the
     * request to finish it was not ignored.
     */
    @FinishRequest int finishIfPossible(int resultCode, Intent resultData, String reason,
            boolean oomAdj) {
        if (DEBUG_RESULTS || DEBUG_STATES) {
            Slog.v(TAG_STATES, "Finishing activity r=" + this + ", result=" + resultCode
                    + ", data=" + resultData + ", reason=" + reason);
        }

        if (finishing) {
            Slog.w(TAG, "Duplicate finish request for r=" + this);
            return FINISH_RESULT_CANCELLED;
        }

        if (!isInStackLocked()) {
            Slog.w(TAG, "Finish request when not in stack for r=" + this);
            return FINISH_RESULT_CANCELLED;
        }

        final ActivityStack stack = getRootTask();
        final boolean mayAdjustTop = (isState(RESUMED) || stack.mResumedActivity == null)
                && stack.isFocusedStackOnDisplay();
        final boolean shouldAdjustGlobalFocus = mayAdjustTop
                // It must be checked before {@link #makeFinishingLocked} is called, because a stack
                // is not visible if it only contains finishing activities.
                && mRootWindowContainer.isTopDisplayFocusedStack(stack);

        mAtmService.deferWindowLayout();
        try {
            makeFinishingLocked();
            // Make a local reference to its task since this.task could be set to null once this
            // activity is destroyed and detached from task.
            final Task task = getTask();
            EventLogTags.writeWmFinishActivity(mUserId, System.identityHashCode(this),
                    task.mTaskId, shortComponentName, reason);
            ActivityRecord next = task.getActivityAbove(this);
            if (next != null) {
                if ((intent.getFlags() & Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET) != 0) {
                    // If the caller asked that this activity (and all above it)
                    // be cleared when the task is reset, don't lose that information,
                    // but propagate it up to the next activity.
                    next.intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
                }
            }

            pauseKeyDispatchingLocked();

            // We are finishing the top focused activity and its task has nothing to be focused so
            // the next focusable task should be focused.
            if (mayAdjustTop && ((ActivityStack) task).topRunningActivity(true /* focusableOnly */)
                    == null) {
                task.adjustFocusToNextFocusableTask("finish-top", false /* allowFocusSelf */,
                        shouldAdjustGlobalFocus);
            }

            finishActivityResults(resultCode, resultData);

            final boolean endTask = task.getActivityBelow(this) == null
                    && !task.isClearingToReuseTask();
            final int transit = endTask ? TRANSIT_TASK_CLOSE : TRANSIT_ACTIVITY_CLOSE;
            if (isState(RESUMED)) {
                if (endTask) {
                    mAtmService.getTaskChangeNotificationController().notifyTaskRemovalStarted(
                            task.getTaskInfo());
                }
                // Prepare app close transition, but don't execute just yet. It is possible that
                // an activity that will be made resumed in place of this one will immediately
                // launch another new activity. In this case current closing transition will be
                // combined with open transition for the new activity.
                if (DEBUG_VISIBILITY || DEBUG_TRANSITION) {
                    Slog.v(TAG_TRANSITION, "Prepare close transition: finishing " + this);
                }
                getDisplay().mDisplayContent.prepareAppTransition(transit, false);

                // When finishing the activity preemptively take the snapshot before the app window
                // is marked as hidden and any configuration changes take place
                if (mAtmService.mWindowManager.mTaskSnapshotController != null) {
                    final ArraySet<Task> tasks = Sets.newArraySet(task);
                    mAtmService.mWindowManager.mTaskSnapshotController.snapshotTasks(tasks);
                    mAtmService.mWindowManager.mTaskSnapshotController
                            .addSkipClosingAppSnapshotTasks(tasks);
                }

                // Tell window manager to prepare for this one to be removed.
                setVisibility(false);

                if (stack.mPausingActivity == null) {
                    if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish needs to pause: " + this);
                    if (DEBUG_USER_LEAVING) {
                        Slog.v(TAG_USER_LEAVING, "finish() => pause with userLeaving=false");
                    }
                    stack.startPausingLocked(false /* userLeaving */, false /* uiSleeping */,
                            null /* resuming */);
                }

                if (endTask) {
                    mAtmService.getLockTaskController().clearLockedTask(task);
                }
            } else if (!isState(PAUSING)) {
                if (mVisibleRequested) {
                    // Prepare and execute close transition.
                    prepareActivityHideTransitionAnimation(transit);
                }

                final boolean removedActivity = completeFinishing("finishIfPossible") == null;
                // Performance optimization - only invoke OOM adjustment if the state changed to
                // 'STOPPING'. Otherwise it will not change the OOM scores.
                if (oomAdj && isState(STOPPING)) {
                    mAtmService.updateOomAdj();
                }

                // The following code is an optimization. When the last non-task overlay activity
                // is removed from the task, we remove the entire task from the stack. However,
                // since that is done after the scheduled destroy callback from the activity, that
                // call to change the visibility of the task overlay activities would be out of
                // sync with the activity visibility being set for this finishing activity above.
                // In this case, we can set the visibility of all the task overlay activities when
                // we detect the last one is finishing to keep them in sync.
                if (task.onlyHasTaskOverlayActivities(false /* includeFinishing */)) {
                    final PooledConsumer c = PooledLambda.obtainConsumer(
                            ActivityRecord::prepareActivityHideTransitionAnimationIfOvarlay,
                            PooledLambda.__(ActivityRecord.class), transit);
                    task.forAllActivities(c);
                    c.recycle();
                }
                return removedActivity ? FINISH_RESULT_REMOVED : FINISH_RESULT_REQUESTED;
            } else {
                if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Finish waiting for pause of: " + this);
            }

            return FINISH_RESULT_REQUESTED;
        } finally {
            mAtmService.continueWindowLayout();
        }
    }

    private void prepareActivityHideTransitionAnimationIfOvarlay(int transit) {
        if (mTaskOverlay) {
            prepareActivityHideTransitionAnimation(transit);
        }
    }

    private void prepareActivityHideTransitionAnimation(int transit) {
        final DisplayContent dc = getDisplay().mDisplayContent;
        dc.prepareAppTransition(transit, false);
        setVisibility(false);
        dc.executeAppTransition();
    }

    /**
     * Complete activity finish request that was initiated earlier. If the activity is still
     * pausing we will wait for it to complete its transition. If the activity that should appear in
     * place of this one is not visible yet - we'll wait for it first. Otherwise - activity can be
     * destroyed right away.
     * @param reason Reason for finishing the activity.
     * @return Flag indicating whether the activity was removed from history.
     */
    ActivityRecord completeFinishing(String reason) {
        if (!finishing || isState(RESUMED)) {
            throw new IllegalArgumentException(
                    "Activity must be finishing and not resumed to complete, r=" + this
                            + ", finishing=" + finishing + ", state=" + mState);
        }

        if (isState(PAUSING)) {
            // Activity is marked as finishing and will be processed once it completes.
            return this;
        }

        final boolean isCurrentVisible = mVisibleRequested || isState(PAUSED);
        if (isCurrentVisible) {
            final ActivityStack stack = getStack();
            final ActivityRecord activity = stack.mResumedActivity;
            boolean ensureVisibility = false;
            if (activity != null && !activity.occludesParent()) {
                // If the resume activity is not opaque, we need to make sure the visibilities of
                // activities be updated, they may be seen by users.
                ensureVisibility = true;
            } else if (mStackSupervisor.getKeyguardController().isKeyguardLocked()
                    && stack.topActivityOccludesKeyguard()) {
                // Ensure activity visibilities and update lockscreen occluded/dismiss state when
                // finishing the top activity that occluded keyguard. So that, the
                // ActivityStack#mTopActivityOccludesKeyguard can be updated and the activity below
                // won't be resumed.
                ensureVisibility = true;
            }

            if (ensureVisibility) {
                getDisplay().ensureActivitiesVisible(null /* starting */, 0 /* configChanges */,
                        false /* preserveWindows */, true /* notifyClients */);
            }
        }

        boolean activityRemoved = false;

        // If this activity is currently visible, and the resumed activity is not yet visible, then
        // hold off on finishing until the resumed one becomes visible.
        // The activity that we are finishing may be over the lock screen. In this case, we do not
        // want to consider activities that cannot be shown on the lock screen as running and should
        // proceed with finishing the activity if there is no valid next top running activity.
        // Note that if this finishing activity is floating task, we don't need to wait the
        // next activity resume and can destroy it directly.
        // TODO(b/137329632): find the next activity directly underneath this one, not just anywhere
        final ActivityRecord next = getDisplayArea().topRunningActivity(
                true /* considerKeyguardState */);
        // isNextNotYetVisible is to check if the next activity is invisible, or it has been
        // requested to be invisible but its windows haven't reported as invisible.  If so, it
        // implied that the current finishing activity should be added into stopping list rather
        // than destroy immediately.
        final boolean isNextNotYetVisible = next != null
                && (!next.nowVisible || !next.mVisibleRequested);
        if (isCurrentVisible && isNextNotYetVisible) {
            // Add this activity to the list of stopping activities. It will be processed and
            // destroyed when the next activity reports idle.
            addToStopping(false /* scheduleIdle */, false /* idleDelayed */,
                    "completeFinishing");
            setState(STOPPING, "completeFinishing");
        } else if (addToFinishingAndWaitForIdle()) {
            // We added this activity to the finishing list and something else is becoming resumed.
            // The activity will complete finishing when the next activity reports idle. No need to
            // do anything else here.
        } else {
            // Not waiting for the next one to become visible, and nothing else will be resumed in
            // place of this activity - requesting destruction right away.
            activityRemoved = destroyIfPossible(reason);
        }

        return activityRemoved ? null : this;
    }

    /**
     * Destroy and cleanup the activity both on client and server if possible. If activity is the
     * last one left on display with home stack and there is no other running activity - delay
     * destroying it until the next one starts.
     */
    boolean destroyIfPossible(String reason) {
        setState(FINISHING, "destroyIfPossible");

        // Make sure the record is cleaned out of other places.
        mStackSupervisor.mStoppingActivities.remove(this);

        final ActivityStack stack = getRootTask();
        final TaskDisplayArea taskDisplayArea = getDisplayArea();
        // TODO(b/137329632): Exclude current activity when looking for the next one with
        // DisplayContent#topRunningActivity().
        final ActivityRecord next = taskDisplayArea.topRunningActivity();
        final boolean isLastStackOverEmptyHome =
                next == null && stack.isFocusedStackOnDisplay()
                        && taskDisplayArea.getOrCreateRootHomeTask() != null;
        if (isLastStackOverEmptyHome) {
            // Don't destroy activity immediately if this is the last activity on the display and
            // the display contains home stack. Although there is no next activity at the moment,
            // another home activity should be started later. Keep this activity alive until next
            // home activity is resumed. This way the user won't see a temporary black screen.
            addToFinishingAndWaitForIdle();
            return false;
        }
        makeFinishingLocked();

        final boolean activityRemoved = destroyImmediately(true /* removeFromApp */,
                "finish-imm:" + reason);

        // If the display does not have running activity, the configuration may need to be
        // updated for restoring original orientation of the display.
        if (next == null) {
            mRootWindowContainer.ensureVisibilityAndConfig(next, getDisplayId(),
                    false /* markFrozenIfConfigChanged */, true /* deferResume */);
        }
        if (activityRemoved) {
            mRootWindowContainer.resumeFocusedStacksTopActivities();
        }

        if (DEBUG_CONTAINERS) {
            Slog.d(TAG_CONTAINERS, "destroyIfPossible: r=" + this + " destroy returned removed="
                    + activityRemoved);
        }

        return activityRemoved;
    }

    /**
     * Add this activity to the list of finishing and trigger resuming of activities in focused
     * stacks.
     * @return {@code true} if some other activity is being resumed as a result of this call.
     */
    @VisibleForTesting
    boolean addToFinishingAndWaitForIdle() {
        if (DEBUG_STATES) Slog.v(TAG, "Enqueueing pending finish: " + this);
        setState(FINISHING, "addToFinishingAndWaitForIdle");
        if (!mStackSupervisor.mFinishingActivities.contains(this)) {
            mStackSupervisor.mFinishingActivities.add(this);
        }
        resumeKeyDispatchingLocked();
        return mRootWindowContainer.resumeFocusedStacksTopActivities();
    }

    /**
     * Destroy the current CLIENT SIDE instance of an activity. This may be called both when
     * actually finishing an activity, or when performing a configuration switch where we destroy
     * the current client-side object but then create a new client-side object for this same
     * HistoryRecord.
     * Normally the server-side record will be removed when the client reports back after
     * destruction. If, however, at this point there is no client process attached, the record will
     * be removed immediately.
     *
     * @return {@code true} if activity was immediately removed from history, {@code false}
     * otherwise.
     */
    boolean destroyImmediately(boolean removeFromApp, String reason) {
        if (DEBUG_SWITCH || DEBUG_CLEANUP) {
            Slog.v(TAG_SWITCH, "Removing activity from " + reason + ": token=" + this
                    + ", app=" + (hasProcess() ? app.mName : "(null)"));
        }

        if (isState(DESTROYING, DESTROYED)) {
            if (DEBUG_STATES) {
                Slog.v(TAG_STATES, "activity " + this + " already destroying."
                        + "skipping request with reason:" + reason);
            }
            return false;
        }

        EventLogTags.writeWmDestroyActivity(mUserId, System.identityHashCode(this),
                task.mTaskId, shortComponentName, reason);

        boolean removedFromHistory = false;

        cleanUp(false /* cleanServices */, false /* setState */);

        if (hasProcess()) {
            if (removeFromApp) {
                app.removeActivity(this);
                if (!app.hasActivities()) {
                    mAtmService.clearHeavyWeightProcessIfEquals(app);
                    // Update any services we are bound to that might care about whether
                    // their client may have activities.
                    // No longer have activities, so update LRU list and oom adj.
                    app.updateProcessInfo(true /* updateServiceConnectionActivities */,
                            false /* activityChange */, true /* updateOomAdj */);
                }
            }

            boolean skipDestroy = false;

            try {
                if (DEBUG_SWITCH) Slog.i(TAG_SWITCH, "Destroying: " + this);
                mAtmService.getLifecycleManager().scheduleTransaction(app.getThread(), appToken,
                        DestroyActivityItem.obtain(finishing, configChangeFlags));
            } catch (Exception e) {
                // We can just ignore exceptions here...  if the process has crashed, our death
                // notification will clean things up.
                if (finishing) {
                    removeFromHistory(reason + " exceptionInScheduleDestroy");
                    removedFromHistory = true;
                    skipDestroy = true;
                }
            }

            nowVisible = false;

            // If the activity is finishing, we need to wait on removing it from the list to give it
            // a chance to do its cleanup.  During that time it may make calls back with its token
            // so we need to be able to find it on the list and so we don't want to remove it from
            // the list yet.  Otherwise, we can just immediately put it in the destroyed state since
            // we are not removing it from the list.
            if (finishing && !skipDestroy) {
                if (DEBUG_STATES) {
                    Slog.v(TAG_STATES, "Moving to DESTROYING: " + this + " (destroy requested)");
                }
                setState(DESTROYING,
                        "destroyActivityLocked. finishing and not skipping destroy");
                mAtmService.mH.postDelayed(mDestroyTimeoutRunnable, DESTROY_TIMEOUT);
            } else {
                if (DEBUG_STATES) {
                    Slog.v(TAG_STATES, "Moving to DESTROYED: " + this + " (destroy skipped)");
                }
                setState(DESTROYED,
                        "destroyActivityLocked. not finishing or skipping destroy");
                if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during destroy for activity " + this);
                app = null;
            }
        } else {
            // Remove this record from the history.
            if (finishing) {
                removeFromHistory(reason + " hadNoApp");
                removedFromHistory = true;
            } else {
                if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to DESTROYED: " + this + " (no app)");
                setState(DESTROYED, "destroyActivityLocked. not finishing and had no app");
            }
        }

        configChangeFlags = 0;

        return removedFromHistory;
    }

    boolean safelyDestroy(String reason) {
        if (isDestroyable()) {
            if (DEBUG_SWITCH) {
                final ActivityStack stack = getRootTask();
                Slog.v(TAG_SWITCH, "Safely destroying " + this + " in state " + getState()
                        + " resumed=" + stack.mResumedActivity
                        + " pausing=" + stack.mPausingActivity
                        + " for reason " + reason);
            }
            return destroyImmediately(true /* removeFromApp */, reason);
        }
        return false;
    }

    /** Note: call {@link #cleanUp(boolean, boolean)} before this method. */
    void removeFromHistory(String reason) {
        finishActivityResults(Activity.RESULT_CANCELED, null /* resultData */);
        makeFinishingLocked();
        if (ActivityTaskManagerDebugConfig.DEBUG_ADD_REMOVE) {
            Slog.i(TAG_ADD_REMOVE, "Removing activity " + this + " from stack callers="
                    + Debug.getCallers(5));
        }

        takeFromHistory();
        removeTimeouts();
        if (DEBUG_STATES) {
            Slog.v(TAG_STATES, "Moving to DESTROYED: " + this + " (removed from history)");
        }
        setState(DESTROYED, "removeFromHistory");
        if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during remove for activity " + this);
        app = null;
        removeAppTokenFromDisplay();

        cleanUpActivityServices();
        removeUriPermissionsLocked();
    }

    void makeFinishingLocked() {
        if (finishing) {
            return;
        }
        finishing = true;
        if (stopped) {
            clearOptionsLocked();
        }
    }

    /**
     * This method is to only be called from the client via binder when the activity is destroyed
     * AND finished.
     */
    void destroyed(String reason) {
        removeDestroyTimeout();

        if (DEBUG_CONTAINERS) Slog.d(TAG_CONTAINERS, "activityDestroyedLocked: r=" + this);

        if (!isState(DESTROYING, DESTROYED)) {
            throw new IllegalStateException(
                    "Reported destroyed for activity that is not destroying: r=" + this);
        }

        if (isInStackLocked()) {
            cleanUp(true /* cleanServices */, false /* setState */);
            removeFromHistory(reason);
        }

        mRootWindowContainer.resumeFocusedStacksTopActivities();
    }

    /**
     * Perform the common clean-up of an activity record.  This is called both as part of
     * destroyActivityLocked() (when destroying the client-side representation) and cleaning things
     * up as a result of its hosting processing going away, in which case there is no remaining
     * client-side state to destroy so only the cleanup here is needed.
     *
     * Note: Call before {@link #removeFromHistory(String)}.
     */
    void cleanUp(boolean cleanServices, boolean setState) {
        task.cleanUpActivityReferences(this);

        deferRelaunchUntilPaused = false;
        frozenBeforeDestroy = false;

        if (setState) {
            setState(DESTROYED, "cleanUp");
            if (DEBUG_APP) Slog.v(TAG_APP, "Clearing app during cleanUp for activity " + this);
            app = null;
        }

        // Inform supervisor the activity has been removed.
        mStackSupervisor.cleanupActivity(this);

        // Remove any pending results.
        if (finishing && pendingResults != null) {
            for (WeakReference<PendingIntentRecord> apr : pendingResults) {
                PendingIntentRecord rec = apr.get();
                if (rec != null) {
                    mAtmService.mPendingIntentController.cancelIntentSender(rec,
                            false /* cleanActivity */);
                }
            }
            pendingResults = null;
        }

        if (cleanServices) {
            cleanUpActivityServices();
        }

        // Get rid of any pending idle timeouts.
        removeTimeouts();
        // Clean-up activities are no longer relaunching (e.g. app process died). Notify window
        // manager so it can update its bookkeeping.
        clearRelaunching();
    }

    boolean isRelaunching() {
        return mPendingRelaunchCount > 0;
    }

    boolean shouldFreezeBounds() {
        // For freeform windows, we can't freeze the bounds at the moment because this would make
        // the resizing unresponsive.
        if (task == null || task.inFreeformWindowingMode()) {
            return false;
        }

        // We freeze the bounds while drag resizing to deal with the time between
        // the divider/drag handle being released, and the handling it's new
        // configuration. If we are relaunched outside of the drag resizing state,
        // we need to be careful not to do this.
        return task.isDragResizing();
    }

    void startRelaunching() {
        if (shouldFreezeBounds()) {
            freezeBounds();
        }

        // In the process of tearing down before relaunching, the app will
        // try and clean up it's child surfaces. We need to prevent this from
        // happening, so we sever the children, transfering their ownership
        // from the client it-self to the parent surface (owned by us).
        detachChildren();

        mPendingRelaunchCount++;
    }

    /**
     * Freezes the task bounds. The size of this task reported the app will be fixed to the bounds
     * freezed by {@link Task#prepareFreezingBounds} until {@link #unfreezeBounds} gets called, even
     * if they change in the meantime. If the bounds are already frozen, the bounds will be frozen
     * with a queue.
     */
    private void freezeBounds() {
        mFrozenBounds.offer(new Rect(task.mPreparedFrozenBounds));

        if (task.mPreparedFrozenMergedConfig.equals(Configuration.EMPTY)) {
            // We didn't call prepareFreezingBounds on the task, so use the current value.
            mFrozenMergedConfig.offer(new Configuration(task.getConfiguration()));
        } else {
            mFrozenMergedConfig.offer(new Configuration(task.mPreparedFrozenMergedConfig));
        }
        // Calling unset() to make it equal to Configuration.EMPTY.
        task.mPreparedFrozenMergedConfig.unset();
    }

    void detachChildren() {
        SurfaceControl.openTransaction();
        for (int i = mChildren.size() - 1; i >= 0; i--) {
            final WindowState w = mChildren.get(i);
            w.mWinAnimator.detachChildren();
        }
        SurfaceControl.closeTransaction();
    }

    void finishRelaunching() {
        unfreezeBounds();

        if (mPendingRelaunchCount > 0) {
            mPendingRelaunchCount--;
        } else {
            // Update keyguard flags upon finishing relaunch.
            checkKeyguardFlagsChanged();
        }
    }

    void clearRelaunching() {
        if (mPendingRelaunchCount == 0) {
            return;
        }
        unfreezeBounds();
        mPendingRelaunchCount = 0;
    }

    /**
     * Unfreezes the previously frozen bounds. See {@link #freezeBounds}.
     */
    private void unfreezeBounds() {
        if (mFrozenBounds.isEmpty()) {
            return;
        }
        mFrozenBounds.remove();
        if (!mFrozenMergedConfig.isEmpty()) {
            mFrozenMergedConfig.remove();
        }
        for (int i = mChildren.size() - 1; i >= 0; i--) {
            final WindowState win = mChildren.get(i);
            win.onUnfreezeBounds();
        }
        mWmService.mWindowPlacerLocked.performSurfacePlacement();
    }

    /**
     * Perform clean-up of service connections in an activity record.
     */
    private void cleanUpActivityServices() {
        if (mServiceConnectionsHolder == null) {
            return;
        }
        // Throw away any services that have been bound by this activity.
        mServiceConnectionsHolder.disconnectActivityFromServices();
        // This activity record is removing, make sure not to disconnect twice.
        mServiceConnectionsHolder = null;
    }

    @Override
    void removeImmediately() {
        onRemovedFromDisplay();
        super.removeImmediately();
    }

    @Override
    void removeIfPossible() {
        mIsExiting = false;
        removeAllWindowsIfPossible();
        removeImmediately();
    }

    @Override
    boolean checkCompleteDeferredRemoval() {
        if (mIsExiting) {
            removeIfPossible();
        }
        return super.checkCompleteDeferredRemoval();
    }

    void onRemovedFromDisplay() {
        if (mRemovingFromDisplay) {
            return;
        }
        mRemovingFromDisplay = true;

        ProtoLog.v(WM_DEBUG_APP_TRANSITIONS, "Removing app token: %s", this);

        commitVisibility(false /* visible */, true /* performLayout */);

        getDisplayContent().mOpeningApps.remove(this);
        getDisplayContent().mUnknownAppVisibilityController.appRemovedOrHidden(this);
        mWmService.mTaskSnapshotController.onAppRemoved(this);
        mStackSupervisor.getActivityMetricsLogger().notifyActivityRemoved(this);
        waitingToShow = false;

        // Defer removal of this activity when either a child is animating, or app transition is on
        // going. App transition animation might be applied on the parent stack not on the activity,
        // but the actual frame buffer is associated with the activity, so we have to keep the
        // activity while a parent is animating.
        boolean delayed = isAnimating(TRANSITION | PARENTS | CHILDREN);
        if (getDisplayContent().mClosingApps.contains(this)) {
            delayed = true;
        } else if (getDisplayContent().mAppTransition.isTransitionSet()) {
            getDisplayContent().mClosingApps.add(this);
            delayed = true;
        }

        ProtoLog.v(WM_DEBUG_APP_TRANSITIONS,
                "Removing app %s delayed=%b animation=%s animating=%b", this, delayed,
                getAnimation(), isAnimating(TRANSITION | PARENTS));

        ProtoLog.v(WM_DEBUG_ADD_REMOVE, "removeAppToken: %s"
                + " delayed=%b Callers=%s", this, delayed, Debug.getCallers(4));

        if (mStartingData != null) {
            removeStartingWindow();
        }

        // If this window was animating, then we need to ensure that the app transition notifies
        // that animations have completed in DisplayContent.handleAnimatingStoppedAndTransition(),
        // so add to that list now
        if (isAnimating(TRANSITION | PARENTS)) {
            getDisplayContent().mNoAnimationNotifyOnTransitionFinished.add(token);
        }

        final ActivityStack stack = getStack();
        if (delayed && !isEmpty()) {
            // set the token aside because it has an active animation to be finished
            ProtoLog.v(WM_DEBUG_ADD_REMOVE,
                    "removeAppToken make exiting: %s", this);
            if (stack != null) {
                stack.mExitingActivities.add(this);
            }
            mIsExiting = true;
        } else {
            // Make sure there is no animation running on this token, so any windows associated
            // with it will be removed as soon as their animations are complete
            cancelAnimation();
            if (stack != null) {
                stack.mExitingActivities.remove(this);
            }
            removeIfPossible();
        }

        stopFreezingScreen(true, true);

        final DisplayContent dc = getDisplayContent();
        if (dc.mFocusedApp == this) {
            ProtoLog.v(WM_DEBUG_FOCUS_LIGHT,
                    "Removing focused app token:%s displayId=%d", this,
                    dc.getDisplayId());
            dc.setFocusedApp(null);
            mWmService.updateFocusedWindowLocked(UPDATE_FOCUS_NORMAL, true /*updateInputWindows*/);
        }
        if (mLetterbox != null) {
            mLetterbox.destroy();
            mLetterbox = null;
        }

        if (!delayed) {
            updateReportedVisibilityLocked();
        }

        // Reset the last saved PiP snap fraction on removal.
        mDisplayContent.mPinnedStackControllerLocked.onActivityHidden(mActivityComponent);
        mWmService.mEmbeddedWindowController.onActivityRemoved(this);
        mRemovingFromDisplay = false;
    }

    /**
     * Returns true if the new child window we are adding to this token is considered greater than
     * the existing child window in this token in terms of z-order.
     */
    @Override
    protected boolean isFirstChildWindowGreaterThanSecond(WindowState newWindow,
            WindowState existingWindow) {
        final int type1 = newWindow.mAttrs.type;
        final int type2 = existingWindow.mAttrs.type;

        // Base application windows should be z-ordered BELOW all other windows in the app token.
        if (type1 == TYPE_BASE_APPLICATION && type2 != TYPE_BASE_APPLICATION) {
            return false;
        } else if (type1 != TYPE_BASE_APPLICATION && type2 == TYPE_BASE_APPLICATION) {
            return true;
        }

        // Starting windows should be z-ordered ABOVE all other windows in the app token.
        if (type1 == TYPE_APPLICATION_STARTING && type2 != TYPE_APPLICATION_STARTING) {
            return true;
        } else if (type1 != TYPE_APPLICATION_STARTING && type2 == TYPE_APPLICATION_STARTING) {
            return false;
        }

        // Otherwise the new window is greater than the existing window.
        return true;
    }

    /**
     * @return {@code true} if starting window is in app's hierarchy.
     */
    boolean hasStartingWindow() {
        if (startingDisplayed || mStartingData != null) {
            return true;
        }
        for (int i = mChildren.size() - 1; i >= 0; i--) {
            if (getChildAt(i).mAttrs.type == TYPE_APPLICATION_STARTING) {
                return true;
            }
        }
        return false;
    }

    boolean isLastWindow(WindowState win) {
        return mChildren.size() == 1 && mChildren.get(0) == win;
    }

    @Override
    void addWindow(WindowState w) {
        super.addWindow(w);

        boolean gotReplacementWindow = false;
        for (int i = mChildren.size() - 1; i >= 0; i--) {
            final WindowState candidate = mChildren.get(i);
            gotReplacementWindow |= candidate.setReplacementWindowIfNeeded(w);
        }

        // if we got a replacement window, reset the timeout to give drawing more time
        if (gotReplacementWindow) {
            mWmService.scheduleWindowReplacementTimeouts(this);
        }
        checkKeyguardFlagsChanged();
    }

    @Override
    void removeChild(WindowState child) {
        if (!mChildren.contains(child)) {
            // This can be true when testing.
            return;
        }
        super.removeChild(child);
        checkKeyguardFlagsChanged();
        updateLetterboxSurface(child);
    }

    void onWindowReplacementTimeout() {
        for (int i = mChildren.size() - 1; i >= 0; --i) {
            (mChildren.get(i)).onWindowReplacementTimeout();
        }
    }

    void setAppLayoutChanges(int changes, String reason) {
        if (!mChildren.isEmpty()) {
            final DisplayContent dc = getDisplayContent();
            dc.pendingLayoutChanges |= changes;
            if (DEBUG_LAYOUT_REPEATS) {
                mWmService.mWindowPlacerLocked.debugLayoutRepeats(reason, dc.pendingLayoutChanges);
            }
        }
    }

    void removeReplacedWindowIfNeeded(WindowState replacement) {
        for (int i = mChildren.size() - 1; i >= 0; i--) {
            final WindowState win = mChildren.get(i);
            if (win.removeReplacedWindowIfNeeded(replacement)) {
                return;
            }
        }
    }

    boolean transferStartingWindow(IBinder transferFrom) {
        final ActivityRecord fromActivity = getDisplayContent().getActivityRecord(transferFrom);
        if (fromActivity == null) {
            return false;
        }

        final WindowState tStartingWindow = fromActivity.startingWindow;
        if (tStartingWindow != null && fromActivity.startingSurface != null) {
            // In this case, the starting icon has already been displayed, so start
            // letting windows get shown immediately without any more transitions.
            getDisplayContent().mSkipAppTransitionAnimation = true;

            ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Moving existing starting %s"
                    + " from %s to %s", tStartingWindow, fromActivity, this);

            final long origId = Binder.clearCallingIdentity();
            try {
                // Transfer the starting window over to the new token.
                mStartingData = fromActivity.mStartingData;
                startingSurface = fromActivity.startingSurface;
                startingDisplayed = fromActivity.startingDisplayed;
                fromActivity.startingDisplayed = false;
                startingWindow = tStartingWindow;
                reportedVisible = fromActivity.reportedVisible;
                fromActivity.mStartingData = null;
                fromActivity.startingSurface = null;
                fromActivity.startingWindow = null;
                fromActivity.startingMoved = true;
                tStartingWindow.mToken = this;
                tStartingWindow.mActivityRecord = this;

                ProtoLog.v(WM_DEBUG_ADD_REMOVE,
                        "Removing starting %s from %s", tStartingWindow, fromActivity);
                fromActivity.removeChild(tStartingWindow);
                fromActivity.postWindowRemoveStartingWindowCleanup(tStartingWindow);
                fromActivity.mVisibleSetFromTransferredStartingWindow = false;
                addWindow(tStartingWindow);

                // Propagate other interesting state between the tokens. If the old token is displayed,
                // we should immediately force the new one to be displayed. If it is animating, we need
                // to move that animation to the new one.
                if (fromActivity.allDrawn) {
                    allDrawn = true;
                }
                if (fromActivity.firstWindowDrawn) {
                    firstWindowDrawn = true;
                }
                if (fromActivity.isVisible()) {
                    setVisible(true);
                    mVisibleRequested = true;
                    mVisibleSetFromTransferredStartingWindow = true;
                }
                setClientVisible(fromActivity.mClientVisible);

                if (fromActivity.isAnimating()) {
                    transferAnimation(fromActivity);

                    // When transferring an animation, we no longer need to apply an animation to
                    // the token we transfer the animation over. Thus, set this flag to indicate
                    // we've transferred the animation.
                    mUseTransferredAnimation = true;
                }

                mWmService.updateFocusedWindowLocked(
                        UPDATE_FOCUS_WILL_PLACE_SURFACES, true /*updateInputWindows*/);
                getDisplayContent().setLayoutNeeded();
                mWmService.mWindowPlacerLocked.performSurfacePlacement();
            } finally {
                Binder.restoreCallingIdentity(origId);
            }
            return true;
        } else if (fromActivity.mStartingData != null) {
            // The previous app was getting ready to show a
            // starting window, but hasn't yet done so.  Steal it!
            ProtoLog.v(WM_DEBUG_STARTING_WINDOW,
                    "Moving pending starting from %s to %s", fromActivity, this);
            mStartingData = fromActivity.mStartingData;
            fromActivity.mStartingData = null;
            fromActivity.startingMoved = true;
            scheduleAddStartingWindow();
            return true;
        }

        // TODO: Transfer thumbnail

        return false;
    }

    /**
     * Tries to transfer the starting window from a token that's above ourselves in the task but
     * not visible anymore. This is a common scenario apps use: Trampoline activity T start main
     * activity M in the same task. Now, when reopening the task, T starts on top of M but then
     * immediately finishes after, so we have to transfer T to M.
     */
    void transferStartingWindowFromHiddenAboveTokenIfNeeded() {
        final PooledFunction p = PooledLambda.obtainFunction(ActivityRecord::transferStartingWindow,
                this, PooledLambda.__(ActivityRecord.class));
        task.forAllActivities(p);
        p.recycle();
    }

    private boolean transferStartingWindow(ActivityRecord fromActivity) {
        if (fromActivity == this) return true;

        return !fromActivity.mVisibleRequested && transferStartingWindow(fromActivity.token);
    }

    void checkKeyguardFlagsChanged() {
        final boolean containsDismissKeyguard = containsDismissKeyguardWindow();
        final boolean containsShowWhenLocked = containsShowWhenLockedWindow();
        if (containsDismissKeyguard != mLastContainsDismissKeyguardWindow
                || containsShowWhenLocked != mLastContainsShowWhenLockedWindow) {
            mWmService.notifyKeyguardFlagsChanged(null /* callback */,
                    getDisplayContent().getDisplayId());
        }
        mLastContainsDismissKeyguardWindow = containsDismissKeyguard;
        mLastContainsShowWhenLockedWindow = containsShowWhenLocked;
        mLastContainsTurnScreenOnWindow = containsTurnScreenOnWindow();
    }

    boolean containsDismissKeyguardWindow() {
        // Window state is transient during relaunch. We are not guaranteed to be frozen during the
        // entirety of the relaunch.
        if (isRelaunching()) {
            return mLastContainsDismissKeyguardWindow;
        }

        for (int i = mChildren.size() - 1; i >= 0; i--) {
            if ((mChildren.get(i).mAttrs.flags & FLAG_DISMISS_KEYGUARD) != 0) {
                return true;
            }
        }
        return false;
    }

    boolean containsShowWhenLockedWindow() {
        // When we are relaunching, it is possible for us to be unfrozen before our previous
        // windows have been added back. Using the cached value ensures that our previous
        // showWhenLocked preference is honored until relaunching is complete.
        if (isRelaunching()) {
            return mLastContainsShowWhenLockedWindow;
        }

        for (int i = mChildren.size() - 1; i >= 0; i--) {
            if ((mChildren.get(i).mAttrs.flags & FLAG_SHOW_WHEN_LOCKED) != 0) {
                return true;
            }
        }

        return false;
    }

    void setShowWhenLocked(boolean showWhenLocked) {
        mShowWhenLocked = showWhenLocked;
        mAtmService.mRootWindowContainer.ensureActivitiesVisible(null /* starting */,
                0 /* configChanges */, false /* preserveWindows */);
    }

    void setInheritShowWhenLocked(boolean inheritShowWhenLocked) {
        mInheritShownWhenLocked = inheritShowWhenLocked;
        mAtmService.mRootWindowContainer.ensureActivitiesVisible(null /* starting */,
                0 /* configChanges */, false /* preserveWindows */);
    }

    /**
     * @return {@code true} if the activity windowing mode is not
     *         {@link android.app.WindowConfiguration#WINDOWING_MODE_PINNED} and a) activity
     *         contains windows that have {@link LayoutParams#FLAG_SHOW_WHEN_LOCKED} set or if the
     *         activity has set {@link #mShowWhenLocked}, or b) if the activity has set
     *         {@link #mInheritShownWhenLocked} and the activity behind this satisfies the
     *         conditions a) above.
     *         Multi-windowing mode will be exited if {@code true} is returned.
     */
    boolean canShowWhenLocked() {
        if (!inPinnedWindowingMode() && (mShowWhenLocked || containsShowWhenLockedWindow())) {
            return true;
        } else if (mInheritShownWhenLocked) {
            final ActivityRecord r = task.getActivityBelow(this);
            return r != null && !r.inPinnedWindowingMode() && (r.mShowWhenLocked
                    || r.containsShowWhenLockedWindow());
        } else {
            return false;
        }
    }

    /**
     * @return Whether we are allowed to show non-starting windows at the moment. We disallow
     *         showing windows during transitions in case we have windows that have wide-color-gamut
     *         color mode set to avoid jank in the middle of the transition.
     */
    boolean canShowWindows() {
        return allDrawn && !(isAnimating(PARENTS) && hasNonDefaultColorWindow());
    }

    /**
     * @return true if we have a window that has a non-default color mode set; false otherwise.
     */
    private boolean hasNonDefaultColorWindow() {
        return forAllWindows(ws -> ws.mAttrs.getColorMode() != COLOR_MODE_DEFAULT,
                true /* topToBottom */);
    }

    WindowState getImeTargetBelowWindow(WindowState w) {
        final int index = mChildren.indexOf(w);
        if (index > 0) {
            final WindowState target = mChildren.get(index - 1);
            if (target.canBeImeTarget()) {
                return target;
            }
        }
        return null;
    }

    WindowState getHighestAnimLayerWindow(WindowState currentTarget) {
        WindowState candidate = null;
        for (int i = mChildren.indexOf(currentTarget); i >= 0; i--) {
            final WindowState w = mChildren.get(i);
            if (w.mRemoved) {
                continue;
            }
            if (candidate == null) {
                candidate = w;
            }
        }
        return candidate;
    }

    @Override
    boolean forAllWindows(ToBooleanFunction<WindowState> callback, boolean traverseTopToBottom) {
        // For legacy reasons we process the TaskStack.mExitingActivities first in DisplayContent
        // before the non-exiting app tokens. So, we skip the exiting app tokens here.
        // TODO: Investigate if we need to continue to do this or if we can just process them
        // in-order.
        if (mIsExiting && !forAllWindowsUnchecked(WindowState::waitingForReplacement, true)) {
            return false;
        }
        return forAllWindowsUnchecked(callback, traverseTopToBottom);
    }

    boolean forAllWindowsUnchecked(ToBooleanFunction<WindowState> callback,
            boolean traverseTopToBottom) {
        return super.forAllWindows(callback, traverseTopToBottom);
    }

    @Override
    boolean forAllActivities(
            Function<ActivityRecord, Boolean> callback, boolean traverseTopToBottom) {
        return callback.apply(this);
    }

    @Override
    void forAllActivities(Consumer<ActivityRecord> callback, boolean traverseTopToBottom) {
        callback.accept(this);
    }

    @Override
    ActivityRecord getActivity(Predicate<ActivityRecord> callback, boolean traverseTopToBottom,
            WindowContainer boundary) {
        return callback.test(this) ? this : null;
    }

    @Override
    protected void setLayer(Transaction t, int layer) {
        if (!mSurfaceAnimator.hasLeash()) {
            t.setLayer(mSurfaceControl, layer);
        }
    }

    @Override
    protected void setRelativeLayer(Transaction t, SurfaceControl relativeTo, int layer) {
        if (!mSurfaceAnimator.hasLeash()) {
            t.setRelativeLayer(mSurfaceControl, relativeTo, layer);
        }
    }

    @Override
    protected void reparentSurfaceControl(Transaction t, SurfaceControl newParent) {
        if (!mSurfaceAnimator.hasLeash()) {
            t.reparent(mSurfaceControl, newParent);
        }
    }

    void logStartActivity(int tag, Task task) {
        final Uri data = intent.getData();
        final String strData = data != null ? data.toSafeString() : null;

        EventLog.writeEvent(tag,
                mUserId, System.identityHashCode(this), task.mTaskId,
                shortComponentName, intent.getAction(),
                intent.getType(), strData, intent.getFlags());
    }

    UriPermissionOwner getUriPermissionsLocked() {
        if (uriPermissions == null) {
            uriPermissions = new UriPermissionOwner(mAtmService.mUgmInternal, this);
        }
        return uriPermissions;
    }

    void addResultLocked(ActivityRecord from, String resultWho,
            int requestCode, int resultCode,
            Intent resultData) {
        ActivityResult r = new ActivityResult(from, resultWho,
                requestCode, resultCode, resultData);
        if (results == null) {
            results = new ArrayList<ResultInfo>();
        }
        results.add(r);
    }

    void removeResultsLocked(ActivityRecord from, String resultWho,
            int requestCode) {
        if (results != null) {
            for (int i=results.size()-1; i>=0; i--) {
                ActivityResult r = (ActivityResult)results.get(i);
                if (r.mFrom != from) continue;
                if (r.mResultWho == null) {
                    if (resultWho != null) continue;
                } else {
                    if (!r.mResultWho.equals(resultWho)) continue;
                }
                if (r.mRequestCode != requestCode) continue;

                results.remove(i);
            }
        }
    }

    void sendResult(int callingUid, String resultWho, int requestCode, int resultCode,
            Intent data) {
        if (callingUid > 0) {
            mAtmService.mUgmInternal.grantUriPermissionFromIntent(callingUid, packageName,
                    data, getUriPermissionsLocked(), mUserId);
        }

        if (DEBUG_RESULTS) {
            Slog.v(TAG, "Send activity result to " + this
                    + " : who=" + resultWho + " req=" + requestCode
                    + " res=" + resultCode + " data=" + data);
        }
        if (isState(RESUMED) && attachedToProcess()) {
            try {
                final ArrayList<ResultInfo> list = new ArrayList<ResultInfo>();
                list.add(new ResultInfo(resultWho, requestCode, resultCode, data));
                mAtmService.getLifecycleManager().scheduleTransaction(app.getThread(), appToken,
                        ActivityResultItem.obtain(list));
                return;
            } catch (Exception e) {
                Slog.w(TAG, "Exception thrown sending result to " + this, e);
            }
        }

        addResultLocked(null /* from */, resultWho, requestCode, resultCode, data);
    }

    private void addNewIntentLocked(ReferrerIntent intent) {
        if (newIntents == null) {
            newIntents = new ArrayList<>();
        }
        newIntents.add(intent);
    }

    final boolean isSleeping() {
        final ActivityStack stack = getRootTask();
        return stack != null ? stack.shouldSleepActivities() : mAtmService.isSleepingLocked();
    }

    /**
     * Deliver a new Intent to an existing activity, so that its onNewIntent()
     * method will be called at the proper time.
     */
    final void deliverNewIntentLocked(int callingUid, Intent intent, String referrer) {
        // The activity now gets access to the data associated with this Intent.
        mAtmService.mUgmInternal.grantUriPermissionFromIntent(callingUid, packageName,
                intent, getUriPermissionsLocked(), mUserId);
        final ReferrerIntent rintent = new ReferrerIntent(intent, referrer);
        boolean unsent = true;
        final boolean isTopActivityWhileSleeping = isTopRunningActivity() && isSleeping();

        // We want to immediately deliver the intent to the activity if:
        // - It is currently resumed or paused. i.e. it is currently visible to the user and we want
        //   the user to see the visual effects caused by the intent delivery now.
        // - The device is sleeping and it is the top activity behind the lock screen (b/6700897).
        if ((mState == RESUMED || mState == PAUSED || isTopActivityWhileSleeping)
                && attachedToProcess()) {
            try {
                ArrayList<ReferrerIntent> ar = new ArrayList<>(1);
                ar.add(rintent);
                // Making sure the client state is RESUMED after transaction completed and doing
                // so only if activity is currently RESUMED. Otherwise, client may have extra
                // life-cycle calls to RESUMED (and PAUSED later).
                mAtmService.getLifecycleManager().scheduleTransaction(app.getThread(), appToken,
                        NewIntentItem.obtain(ar, mState == RESUMED));
                unsent = false;
            } catch (RemoteException e) {
                Slog.w(TAG, "Exception thrown sending new intent to " + this, e);
            } catch (NullPointerException e) {
                Slog.w(TAG, "Exception thrown sending new intent to " + this, e);
            }
        }
        if (unsent) {
            addNewIntentLocked(rintent);
        }
    }

    void updateOptionsLocked(ActivityOptions options) {
        if (options != null) {
            if (DEBUG_TRANSITION) Slog.i(TAG, "Update options for " + this);
            if (pendingOptions != null) {
                pendingOptions.abort();
            }
            pendingOptions = options;
        }
    }

    void applyOptionsLocked() {
        if (pendingOptions != null
                && pendingOptions.getAnimationType() != ANIM_SCENE_TRANSITION) {
            if (DEBUG_TRANSITION) Slog.i(TAG, "Applying options for " + this);
            applyOptionsLocked(pendingOptions, intent);
            if (task == null) {
                clearOptionsLocked(false /* withAbort */);
            } else {
                // This will clear the options for all the ActivityRecords for this Task.
                task.forAllActivities((r) -> {
                    r.clearOptionsLocked(false /* withAbort */);
                });
            }
        }
    }

    /**
     * Apply override app transition base on options & animation type.
     */
    void applyOptionsLocked(ActivityOptions pendingOptions, Intent intent) {
        final int animationType = pendingOptions.getAnimationType();
        final DisplayContent displayContent = getDisplayContent();
        switch (animationType) {
            case ANIM_CUSTOM:
                displayContent.mAppTransition.overridePendingAppTransition(
                        pendingOptions.getPackageName(),
                        pendingOptions.getCustomEnterResId(),
                        pendingOptions.getCustomExitResId(),
                        pendingOptions.getAnimationStartedListener(),
                        pendingOptions.getAnimationFinishedListener());
                break;
            case ANIM_CLIP_REVEAL:
                displayContent.mAppTransition.overridePendingAppTransitionClipReveal(
                        pendingOptions.getStartX(), pendingOptions.getStartY(),
                        pendingOptions.getWidth(), pendingOptions.getHeight());
                if (intent.getSourceBounds() == null) {
                    intent.setSourceBounds(new Rect(pendingOptions.getStartX(),
                            pendingOptions.getStartY(),
                            pendingOptions.getStartX() + pendingOptions.getWidth(),
                            pendingOptions.getStartY() + pendingOptions.getHeight()));
                }
                break;
            case ANIM_SCALE_UP:
                displayContent.mAppTransition.overridePendingAppTransitionScaleUp(
                        pendingOptions.getStartX(), pendingOptions.getStartY(),
                        pendingOptions.getWidth(), pendingOptions.getHeight());
                if (intent.getSourceBounds() == null) {
                    intent.setSourceBounds(new Rect(pendingOptions.getStartX(),
                            pendingOptions.getStartY(),
                            pendingOptions.getStartX() + pendingOptions.getWidth(),
                            pendingOptions.getStartY() + pendingOptions.getHeight()));
                }
                break;
            case ANIM_THUMBNAIL_SCALE_UP:
            case ANIM_THUMBNAIL_SCALE_DOWN:
                final boolean scaleUp = (animationType == ANIM_THUMBNAIL_SCALE_UP);
                final GraphicBuffer buffer = pendingOptions.getThumbnail();
                displayContent.mAppTransition.overridePendingAppTransitionThumb(buffer,
                        pendingOptions.getStartX(), pendingOptions.getStartY(),
                        pendingOptions.getAnimationStartedListener(),
                        scaleUp);
                if (intent.getSourceBounds() == null && buffer != null) {
                    intent.setSourceBounds(new Rect(pendingOptions.getStartX(),
                            pendingOptions.getStartY(),
                            pendingOptions.getStartX() + buffer.getWidth(),
                            pendingOptions.getStartY() + buffer.getHeight()));
                }
                break;
            case ANIM_THUMBNAIL_ASPECT_SCALE_UP:
            case ANIM_THUMBNAIL_ASPECT_SCALE_DOWN:
                final AppTransitionAnimationSpec[] specs = pendingOptions.getAnimSpecs();
                final IAppTransitionAnimationSpecsFuture specsFuture =
                        pendingOptions.getSpecsFuture();
                if (specsFuture != null) {
                    displayContent.mAppTransition.overridePendingAppTransitionMultiThumbFuture(
                            specsFuture, pendingOptions.getAnimationStartedListener(),
                            animationType == ANIM_THUMBNAIL_ASPECT_SCALE_UP);
                } else if (animationType == ANIM_THUMBNAIL_ASPECT_SCALE_DOWN
                        && specs != null) {
                    displayContent.mAppTransition.overridePendingAppTransitionMultiThumb(
                            specs, pendingOptions.getAnimationStartedListener(),
                            pendingOptions.getAnimationFinishedListener(), false);
                } else {
                    displayContent.mAppTransition.overridePendingAppTransitionAspectScaledThumb(
                            pendingOptions.getThumbnail(),
                            pendingOptions.getStartX(), pendingOptions.getStartY(),
                            pendingOptions.getWidth(), pendingOptions.getHeight(),
                            pendingOptions.getAnimationStartedListener(),
                            (animationType == ANIM_THUMBNAIL_ASPECT_SCALE_UP));
                    if (intent.getSourceBounds() == null) {
                        intent.setSourceBounds(new Rect(pendingOptions.getStartX(),
                                pendingOptions.getStartY(),
                                pendingOptions.getStartX() + pendingOptions.getWidth(),
                                pendingOptions.getStartY() + pendingOptions.getHeight()));
                    }
                }
                break;
            case ANIM_OPEN_CROSS_PROFILE_APPS:
                displayContent.mAppTransition
                        .overridePendingAppTransitionStartCrossProfileApps();
                break;
            case ANIM_REMOTE_ANIMATION:
                displayContent.mAppTransition.overridePendingAppTransitionRemote(
                        pendingOptions.getRemoteAnimationAdapter());
                break;
            case ANIM_NONE:
            case ANIM_UNDEFINED:
                break;
            default:
                Slog.e(TAG_WM, "applyOptionsLocked: Unknown animationType=" + animationType);
                break;
        }
    }

    void clearAllDrawn() {
        allDrawn = false;
    }

    /**
     * Returns whether the drawn window states of this {@link ActivityRecord} has considered every
     * child {@link WindowState}. A child is considered if it has been passed into
     * {@link #updateDrawnWindowStates(WindowState)} after being added. This is used to determine
     * whether states, such as {@code allDrawn}, can be set, which relies on state variables such as
     * {@code mNumInterestingWindows}, which depend on all {@link WindowState}s being considered.
     *
     * @return {@code true} If all children have been considered, {@code false}.
     */
    private boolean allDrawnStatesConsidered() {
        for (int i = mChildren.size() - 1; i >= 0; --i) {
            final WindowState child = mChildren.get(i);
            if (child.mightAffectAllDrawn() && !child.getDrawnStateEvaluated()) {
                return false;
            }
        }
        return true;
    }

    /**
     *  Determines if the token has finished drawing. This should only be called from
     *  {@link DisplayContent#applySurfaceChangesTransaction}
     */
    void updateAllDrawn() {
        if (!allDrawn) {
            // Number of drawn windows can be less when a window is being relaunched, wait for
            // all windows to be launched and drawn for this token be considered all drawn.
            final int numInteresting = mNumInterestingWindows;

            // We must make sure that all present children have been considered (determined by
            // {@link #allDrawnStatesConsidered}) before evaluating whether everything has been
            // drawn.
            if (numInteresting > 0 && allDrawnStatesConsidered()
                    && mNumDrawnWindows >= numInteresting && !isRelaunching()) {
                if (DEBUG_VISIBILITY) Slog.v(TAG, "allDrawn: " + this
                        + " interesting=" + numInteresting + " drawn=" + mNumDrawnWindows);
                allDrawn = true;
                // Force an additional layout pass where
                // WindowStateAnimator#commitFinishDrawingLocked() will call performShowLocked().
                if (mDisplayContent != null) {
                    mDisplayContent.setLayoutNeeded();
                }
                mWmService.mH.obtainMessage(H.NOTIFY_ACTIVITY_DRAWN, token).sendToTarget();
            }
        }
    }

    ActivityOptions getOptionsForTargetActivityLocked() {
        return pendingOptions != null ? pendingOptions.forTargetActivity() : null;
    }

    void clearOptionsLocked() {
        clearOptionsLocked(true /* withAbort */);
    }

    void clearOptionsLocked(boolean withAbort) {
        if (withAbort && pendingOptions != null) {
            pendingOptions.abort();
        }
        pendingOptions = null;
    }

    ActivityOptions takeOptionsLocked(boolean fromClient) {
        if (DEBUG_TRANSITION) Slog.i(TAG, "Taking options for " + this + " callers="
                + Debug.getCallers(6));
        ActivityOptions opts = pendingOptions;

        // If we are trying to take activity options from the client, do not null it out if it's a
        // remote animation as the client doesn't need it ever. This is a workaround when client is
        // faster to take the options than we are to resume the next activity.
        // TODO (b/132432864): Fix the root cause of these transition preparing/applying options
        // timing somehow
        if (!fromClient || opts == null || opts.getRemoteAnimationAdapter() == null) {
            pendingOptions = null;
        }
        return opts;
    }

    boolean allowMoveToFront() {
        return pendingOptions == null || !pendingOptions.getAvoidMoveToFront();
    }

    void removeUriPermissionsLocked() {
        if (uriPermissions != null) {
            uriPermissions.removeUriPermissions();
            uriPermissions = null;
        }
    }

    void pauseKeyDispatchingLocked() {
        if (!keysPaused) {
            keysPaused = true;

            if (getDisplayContent() != null) {
                getDisplayContent().getInputMonitor().pauseDispatchingLw(this);
            }
        }
    }

    void resumeKeyDispatchingLocked() {
        if (keysPaused) {
            keysPaused = false;

            if (getDisplayContent() != null) {
                getDisplayContent().getInputMonitor().resumeDispatchingLw(this);
            }
        }
    }

    private void updateTaskDescription(CharSequence description) {
        task.lastDescription = description;
    }

    void setDeferHidingClient(boolean deferHidingClient) {
        if (mDeferHidingClient == deferHidingClient) {
            return;
        }
        mDeferHidingClient = deferHidingClient;
        if (!mDeferHidingClient && !mVisibleRequested) {
            // Hiding the client is no longer deferred and the app isn't visible still, go ahead and
            // update the visibility.
            setVisibility(false);
        }
    }

    @Override
    boolean isVisible() {
        // If the activity isn't hidden then it is considered visible and there is no need to check
        // its children windows to see if they are visible.
        return mVisible;
    }

    void setVisible(boolean visible) {
        if (visible != mVisible) {
            mVisible = visible;
            scheduleAnimation();
        }
    }

    /**
     * Set visibility on this {@link ActivityRecord}
     *
     * <p class="note"><strong>Note: </strong>This function might not update the visibility of
     * this {@link ActivityRecord} immediately. In case we are preparing an app transition, we
     * delay changing the visibility of this {@link ActivityRecord} until we execute that
     * transition.</p>
     *
     * @param visible {@code true} if the {@link ActivityRecord} should become visible, otherwise
     *                this should become invisible.
     */
    void setVisibility(boolean visible) {
        if (getParent() == null) {
            Slog.w(TAG_WM, "Attempted to set visibility of non-existing app token: "
                    + appToken);
            return;
        }
        if (visible) {
            mDeferHidingClient = false;
        }
        setVisibility(visible, mDeferHidingClient);
        mAtmService.addWindowLayoutReasons(
                ActivityTaskManagerService.LAYOUT_REASON_VISIBILITY_CHANGED);
        mStackSupervisor.getActivityMetricsLogger().notifyVisibilityChanged(this);
        mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = true;
    }

    @VisibleForTesting
    void setVisibility(boolean visible, boolean deferHidingClient) {
        final AppTransition appTransition = getDisplayContent().mAppTransition;

        // Don't set visibility to false if we were already not visible. This prevents WM from
        // adding the app to the closing app list which doesn't make sense for something that is
        // already not visible. However, set visibility to true even if we are already visible.
        // This makes sure the app is added to the opening apps list so that the right
        // transition can be selected.
        // TODO: Probably a good idea to separate the concept of opening/closing apps from the
        // concept of setting visibility...
        if (!visible && !mVisibleRequested) {

            if (!deferHidingClient && mLastDeferHidingClient) {
                // We previously deferred telling the client to hide itself when visibility was
                // initially set to false. Now we would like it to hide, so go ahead and set it.
                mLastDeferHidingClient = deferHidingClient;
                setClientVisible(false);
            }
            return;
        }

        ProtoLog.v(WM_DEBUG_APP_TRANSITIONS,
                "setAppVisibility(%s, visible=%b): %s visible=%b mVisibleRequested=%b Callers=%s",
                appToken, visible, appTransition, isVisible(), mVisibleRequested,
                Debug.getCallers(6));

        onChildVisibilityRequested(visible);

        final DisplayContent displayContent = getDisplayContent();
        displayContent.mOpeningApps.remove(this);
        displayContent.mClosingApps.remove(this);
        waitingToShow = false;
        mVisibleRequested = visible;
        mLastDeferHidingClient = deferHidingClient;

        if (!visible) {
            // If the app is dead while it was visible, we kept its dead window on screen.
            // Now that the app is going invisible, we can remove it. It will be restarted
            // if made visible again.
            removeDeadWindows();
        } else {
            if (!appTransition.isTransitionSet()
                    && appTransition.isReady()) {
                // Add the app mOpeningApps if transition is unset but ready. This means
                // we're doing a screen freeze, and the unfreeze will wait for all opening
                // apps to be ready.
                displayContent.mOpeningApps.add(this);
            }
            startingMoved = false;
            // If the token is currently hidden (should be the common case), or has been
            // stopped, then we need to set up to wait for its windows to be ready.
            if (!isVisible() || mAppStopped) {
                clearAllDrawn();

                // If the app was already visible, don't reset the waitingToShow state.
                if (!isVisible()) {
                    waitingToShow = true;

                    // If the client isn't hidden, we don't need to reset the drawing state.
                    if (!isClientVisible()) {
                        // Let's reset the draw state in order to prevent the starting window to be
                        // immediately dismissed when the app still has the surface.
                        forAllWindows(w -> {
                            if (w.mWinAnimator.mDrawState == HAS_DRAWN) {
                                w.mWinAnimator.resetDrawState();

                                // Force add to mResizingWindows, so that we are guaranteed to get
                                // another reportDrawn callback.
                                w.resetLastContentInsets();
                            }
                        }, true /* traverseTopToBottom */);
                    }
                }
            }

            // In the case where we are making an app visible but holding off for a transition,
            // we still need to tell the client to make its windows visible so they get drawn.
            // Otherwise, we will wait on performing the transition until all windows have been
            // drawn, they never will be, and we are sad.
            setClientVisible(true);

            requestUpdateWallpaperIfNeeded();

            ProtoLog.v(WM_DEBUG_ADD_REMOVE, "No longer Stopped: %s", this);
            mAppStopped = false;

            transferStartingWindowFromHiddenAboveTokenIfNeeded();
        }

        // If we are preparing an app transition, then delay changing
        // the visibility of this token until we execute that transition.
        // Note that we ignore display frozen since we want the opening / closing transition type
        // can be updated correctly even display frozen, and it's safe since in applyAnimation will
        // still check DC#okToAnimate again if the transition animation is fine to apply.
        if (okToAnimate(true /* ignoreFrozen */) && appTransition.isTransitionSet()) {
            if (visible) {
                displayContent.mOpeningApps.add(this);
                mEnteringAnimation = true;
            } else {
                displayContent.mClosingApps.add(this);
                mEnteringAnimation = false;
            }
            if (appTransition.getAppTransition() == TRANSIT_TASK_OPEN_BEHIND) {
                // We're launchingBehind, add the launching activity to mOpeningApps.
                final WindowState win = getDisplayContent().findFocusedWindow();
                if (win != null) {
                    final ActivityRecord focusedActivity = win.mActivityRecord;
                    if (focusedActivity != null) {
                        ProtoLog.d(WM_DEBUG_APP_TRANSITIONS,
                                "TRANSIT_TASK_OPEN_BEHIND,  adding %s to mOpeningApps",
                                focusedActivity);

                        // Force animation to be loaded.
                        displayContent.mOpeningApps.add(focusedActivity);
                    }
                }
            }
            return;
        }

        commitVisibility(visible, true /* performLayout */);
        updateReportedVisibilityLocked();
    }

    @Override
    boolean applyAnimation(WindowManager.LayoutParams lp, int transit, boolean enter,
            boolean isVoiceInteraction,
            @Nullable OnAnimationFinishedCallback animationFinishedCallback) {
        if (mUseTransferredAnimation) {
            return false;
        }
        return super.applyAnimation(lp, transit, enter, isVoiceInteraction,
                animationFinishedCallback);
    }

    /**
     * Update visibility to this {@link ActivityRecord}.
     *
     * <p class="note"><strong>Note: </strong> Unlike {@link #setVisibility}, this immediately
     * updates the visibility without starting an app transition. Since this function may start
     * animation on {@link WindowState} depending on app transition animation status, an app
     * transition animation must be started before calling this function if necessary.</p>
     *
     * @param visible {@code true} if this {@link ActivityRecord} should become visible, otherwise
     *                this should become invisible.
     * @param performLayout if {@code true}, perform surface placement after committing visibility.
     */
    void commitVisibility(boolean visible, boolean performLayout) {
        // Reset the state of mHiddenSetFromTransferredStartingWindow since visibility is actually
        // been set by the app now.
        mVisibleSetFromTransferredStartingWindow = false;
        if (visible == isVisible()) {
            return;
        }

        final int windowsCount = mChildren.size();
        for (int i = 0; i < windowsCount; i++) {
            mChildren.get(i).onAppVisibilityChanged(visible, isAnimating(PARENTS));
        }
        setVisible(visible);
        mVisibleRequested = visible;
        if (!visible) {
            stopFreezingScreen(true, true);
        } else {
            // If we are being set visible, and the starting window is not yet displayed,
            // then make sure it doesn't get displayed.
            if (startingWindow != null && !startingWindow.isDrawnLw()) {
                startingWindow.clearPolicyVisibilityFlag(LEGACY_POLICY_VISIBILITY);
                startingWindow.mLegacyPolicyVisibilityAfterAnim = false;
            }
            // We are becoming visible, so better freeze the screen with the windows that are
            // getting visible so we also wait for them.
            forAllWindows(mWmService::makeWindowFreezingScreenIfNeededLocked, true);
        }
        ProtoLog.v(WM_DEBUG_APP_TRANSITIONS,
                "commitVisibility: %s: visible=%b mVisibleRequested=%b", this,
                isVisible(), mVisibleRequested);
        final DisplayContent displayContent = getDisplayContent();
        displayContent.getInputMonitor().setUpdateInputWindowsNeededLw();
        if (performLayout) {
            mWmService.updateFocusedWindowLocked(UPDATE_FOCUS_WILL_PLACE_SURFACES,
                    false /*updateInputWindows*/);
            mWmService.mWindowPlacerLocked.performSurfacePlacement();
        }
        displayContent.getInputMonitor().updateInputWindowsLw(false /*force*/);
        mUseTransferredAnimation = false;

        postApplyAnimation(visible);
    }

    /**
     * Post process after applying an app transition animation.
     *
     * <p class="note"><strong>Note: </strong> This function must be called after the animations
     * have been applied and {@link #commitVisibility}.</p>
     *
     * @param visible {@code true} if this {@link ActivityRecord} has become visible, otherwise
     *                this has become invisible.
     */
    private void postApplyAnimation(boolean visible) {
        final boolean delayed = isAnimating(PARENTS | CHILDREN);
        if (!delayed) {
            // We aren't delayed anything, but exiting windows rely on the animation finished
            // callback being called in case the ActivityRecord was pretending to be delayed,
            // which we might have done because we were in closing/opening apps list.
            onAnimationFinished(ANIMATION_TYPE_APP_TRANSITION, null /* AnimationAdapter */);
            if (visible) {
                // The token was made immediately visible, there will be no entrance animation.
                // We need to inform the client the enter animation was finished.
                mEnteringAnimation = true;
                mWmService.mActivityManagerAppTransitionNotifier.onAppTransitionFinishedLocked(
                        token);
            }
        }

        // If we're becoming visible, immediately change client visibility as well. there seem
        // to be some edge cases where we change our visibility but client visibility never gets
        // updated.
        // If we're becoming invisible, update the client visibility if we are not running an
        // animation. Otherwise, we'll update client visibility in onAnimationFinished.
        if (visible || !isAnimating(PARENTS)) {
            setClientVisible(visible);
        }

        final DisplayContent displayContent = getDisplayContent();
        if (!displayContent.mClosingApps.contains(this)
                && !displayContent.mOpeningApps.contains(this)) {
            // Take the screenshot before possibly hiding the WSA, otherwise the screenshot
            // will not be taken.
            mWmService.mTaskSnapshotController.notifyAppVisibilityChanged(this, visible);
        }

        // If we are hidden but there is no delay needed we immediately
        // apply the Surface transaction so that the ActivityManager
        // can have some guarantee on the Surface state following
        // setting the visibility. This captures cases like dismissing
        // the docked or pinned stack where there is no app transition.
        //
        // In the case of a "Null" animation, there will be
        // no animation but there will still be a transition set.
        // We still need to delay hiding the surface such that it
        // can be synchronized with showing the next surface in the transition.
        if (!isVisible() && !delayed && !displayContent.mAppTransition.isTransitionSet()) {
            SurfaceControl.openTransaction();
            try {
                forAllWindows(win -> {
                    win.mWinAnimator.hide("immediately hidden"); }, true);
            } finally {
                SurfaceControl.closeTransaction();
            }
        }
    }

    /**
     * Check if visibility of this {@link ActivityRecord} should be updated as part of an app
     * transition.
     *
     * <p class="note><strong>Note:</strong> If the visibility of this {@link ActivityRecord} is
     * already set to {@link #mVisible}, we don't need to update the visibility. So {@code false} is
     * returned.</p>
     *
     * @param visible {@code true} if this {@link ActivityRecord} should become visible,
     *                {@code false} if this should become invisible.
     * @return {@code true} if visibility of this {@link ActivityRecord} should be updated, and
     *         an app transition animation should be run.
     */
    boolean shouldApplyAnimation(boolean visible) {
        // Allow for state update and animation to be applied if:
        // * activity is transitioning visibility state
        // * or the activity was marked as hidden and is exiting before we had a chance to play the
        // transition animation
        // * or this is an opening app and windows are being replaced (e.g. freeform window to
        //   normal window).
        return isVisible() != visible || (!isVisible() && mIsExiting)
                || (visible && forAllWindows(WindowState::waitingForReplacement, true));
    }

    /**
     * See {@link Activity#setDisablePreviewScreenshots}.
     */
    void setDisablePreviewScreenshots(boolean disable) {
        mDisablePreviewScreenshots = disable;
    }

    /**
     * Retrieves whether we'd like to generate a snapshot that's based solely on the theme. This is
     * the case when preview screenshots are disabled {@link #setDisablePreviewScreenshots} or when
     * we can't take a snapshot for other reasons, for example, if we have a secure window.
     *
     * @return True if we need to generate an app theme snapshot, false if we'd like to take a real
     *         screenshot.
     */
    boolean shouldUseAppThemeSnapshot() {
        return mDisablePreviewScreenshots || forAllWindows(w -> {
                    return mWmService.isSecureLocked(w);
                }, true /* topToBottom */);
    }

    /**
     * Sets whether the current launch can turn the screen on.
     * @see #currentLaunchCanTurnScreenOn()
     */
    void setCurrentLaunchCanTurnScreenOn(boolean currentLaunchCanTurnScreenOn) {
        mCurrentLaunchCanTurnScreenOn = currentLaunchCanTurnScreenOn;
    }

    /**
     * Indicates whether the current launch can turn the screen on. This is to prevent multiple
     * relayouts from turning the screen back on. The screen should only turn on at most
     * once per activity resume.
     * <p>
     * Note this flag is only meaningful when {@link WindowManager.LayoutParams#FLAG_TURN_SCREEN_ON}
     * or {@link ActivityRecord#canTurnScreenOn} is set.
     *
     * @return {@code true} if the activity is ready to turn on the screen.
     */
    boolean currentLaunchCanTurnScreenOn() {
        return mCurrentLaunchCanTurnScreenOn;
    }

    void setState(ActivityState state, String reason) {
        if (DEBUG_STATES) Slog.v(TAG_STATES, "State movement: " + this + " from:" + getState()
                        + " to:" + state + " reason:" + reason);

        if (state == mState) {
            // No need to do anything if state doesn't change.
            if (DEBUG_STATES) Slog.v(TAG_STATES, "State unchanged from:" + state);
            return;
        }

        mState = state;

        if (task != null) {
            task.onActivityStateChanged(this, state, reason);
        }

        // The WindowManager interprets the app stopping signal as
        // an indication that the Surface will eventually be destroyed.
        // This however isn't necessarily true if we are going to sleep.
        if (state == STOPPING && !isSleeping()) {
            if (getParent() == null) {
                Slog.w(TAG_WM, "Attempted to notify stopping on non-existing app token: "
                        + appToken);
                return;
            }
            detachChildren();
        }

        if (state == RESUMED) {
            mAtmService.updateBatteryStats(this, true);
            mAtmService.updateActivityUsageStats(this, Event.ACTIVITY_RESUMED);
        } else if (state == PAUSED) {
            mAtmService.updateBatteryStats(this, false);
            mAtmService.updateActivityUsageStats(this, Event.ACTIVITY_PAUSED);
        } else if (state == STOPPED) {
            mAtmService.updateActivityUsageStats(this, Event.ACTIVITY_STOPPED);
        } else if (state == DESTROYED) {
            mAtmService.updateActivityUsageStats(this, Event.ACTIVITY_DESTROYED);
        }
    }

    ActivityState getState() {
        return mState;
    }

    /**
     * Returns {@code true} if the Activity is in the specified state.
     */
    boolean isState(ActivityState state) {
        return state == mState;
    }

    /**
     * Returns {@code true} if the Activity is in one of the specified states.
     */
    boolean isState(ActivityState state1, ActivityState state2) {
        return state1 == mState || state2 == mState;
    }

    /**
     * Returns {@code true} if the Activity is in one of the specified states.
     */
    boolean isState(ActivityState state1, ActivityState state2, ActivityState state3) {
        return state1 == mState || state2 == mState || state3 == mState;
    }

    /**
     * Returns {@code true} if the Activity is in one of the specified states.
     */
    boolean isState(ActivityState state1, ActivityState state2, ActivityState state3,
            ActivityState state4) {
        return state1 == mState || state2 == mState || state3 == mState || state4 == mState;
    }

    /**
     * Returns {@code true} if the Activity is in one of the specified states.
     */
    boolean isState(ActivityState state1, ActivityState state2, ActivityState state3,
            ActivityState state4, ActivityState state5) {
        return state1 == mState || state2 == mState || state3 == mState || state4 == mState
                || state5 == mState;
    }

    /**
     * Returns {@code true} if the Activity is in one of the specified states.
     */
    boolean isState(ActivityState state1, ActivityState state2, ActivityState state3,
            ActivityState state4, ActivityState state5, ActivityState state6) {
        return state1 == mState || state2 == mState || state3 == mState || state4 == mState
                || state5 == mState || state6 == mState;
    }

    void destroySurfaces() {
        destroySurfaces(false /*cleanupOnResume*/);
    }

    /**
     * Destroy surfaces which have been marked as eligible by the animator, taking care to ensure
     * the client has finished with them.
     *
     * @param cleanupOnResume whether this is done when app is resumed without fully stopped. If
     * set to true, destroy only surfaces of removed windows, and clear relevant flags of the
     * others so that they are ready to be reused. If set to false (common case), destroy all
     * surfaces that's eligible, if the app is already stopped.
     */
    private void destroySurfaces(boolean cleanupOnResume) {
        boolean destroyedSomething = false;

        // Copying to a different list as multiple children can be removed.
        final ArrayList<WindowState> children = new ArrayList<>(mChildren);
        for (int i = children.size() - 1; i >= 0; i--) {
            final WindowState win = children.get(i);
            destroyedSomething |= win.destroySurface(cleanupOnResume, mAppStopped);
        }
        if (destroyedSomething) {
            final DisplayContent dc = getDisplayContent();
            dc.assignWindowLayers(true /*setLayoutNeeded*/);
            updateLetterboxSurface(null);
        }
    }

    void notifyAppResumed(boolean wasStopped) {
        if (getParent() == null) {
            Slog.w(TAG_WM, "Attempted to notify resumed of non-existing app token: "
                    + appToken);
            return;
        }
        ProtoLog.v(WM_DEBUG_ADD_REMOVE, "notifyAppResumed: wasStopped=%b %s",
                wasStopped, this);
        mAppStopped = false;
        // Allow the window to turn the screen on once the app is resumed again.
        setCurrentLaunchCanTurnScreenOn(true);
        if (!wasStopped) {
            destroySurfaces(true /*cleanupOnResume*/);
        }
    }

    /**
     * Notify that the app has stopped, and it is okay to destroy any surfaces which were
     * keeping alive in case they were still being used.
     */
    void notifyAppStopped() {
        ProtoLog.v(WM_DEBUG_ADD_REMOVE, "notifyAppStopped: %s", this);
        mAppStopped = true;
        // Reset the last saved PiP snap fraction on app stop.
        mDisplayContent.mPinnedStackControllerLocked.onActivityHidden(mActivityComponent);
        destroySurfaces();
        // Remove any starting window that was added for this app if they are still around.
        removeStartingWindow();
    }

    /**
     * Suppress transition until the new activity becomes ready, otherwise the keyguard can appear
     * for a short amount of time before the new process with the new activity had the ability to
     * set its showWhenLocked flags.
     */
    void notifyUnknownVisibilityLaunchedForKeyguardTransition() {
        // No display activities never add a window, so there is no point in waiting them for
        // relayout.
        if (noDisplay || !mStackSupervisor.getKeyguardController().isKeyguardLocked()) {
            return;
        }

        mDisplayContent.mUnknownAppVisibilityController.notifyLaunched(this);
    }

    /** @return {@code true} if this activity should be made visible. */
    boolean shouldBeVisible(boolean behindFullscreenActivity, boolean ignoringKeyguard) {
        // Check whether activity should be visible without Keyguard influence
        visibleIgnoringKeyguard = (!behindFullscreenActivity || mLaunchTaskBehind)
                && okToShowLocked();

        if (ignoringKeyguard) {
            return visibleIgnoringKeyguard;
        }

        final ActivityStack stack = getRootTask();
        if (stack == null) {
            return false;
        }

        // Activity in a pinned stack should not be visible if the stack is in force hidden state.
        // Typically due to the FLAG_FORCE_HIDDEN_FOR_PINNED_TASK set on the stack, which is a
        // work around to send onStop before windowing mode change callbacks.
        // See also ActivityStackSupervisor#removePinnedStackInSurfaceTransaction
        // TODO: Should we ever be visible if the stack/task is invisible?
        if (inPinnedWindowingMode() && stack.isForceHidden()) {
            return false;
        }

        // Check if the activity is on a sleeping display, and if it can turn it ON.
        if (getDisplay().isSleeping()) {
            final boolean canTurnScreenOn = !mSetToSleep || canTurnScreenOn()
                    || canShowWhenLocked() || containsDismissKeyguardWindow();
            if (!canTurnScreenOn) {
                return false;
            }
        }

        // Now check whether it's really visible depending on Keyguard state, and update
        // {@link ActivityStack} internal states.
        // Inform the method if this activity is the top activity of this stack, but exclude the
        // case where this is the top activity in a pinned stack.
        final boolean isTop = this == stack.getTopNonFinishingActivity();
        final boolean isTopNotPinnedStack = stack.isAttached()
                && stack.getDisplayArea().isTopNotPinnedStack(stack);
        final boolean visibleIgnoringDisplayStatus = stack.checkKeyguardVisibility(this,
                visibleIgnoringKeyguard, isTop && isTopNotPinnedStack);

        return visibleIgnoringDisplayStatus;
    }

    boolean shouldBeVisible() {
        final ActivityStack stack = getRootTask();
        if (stack == null) {
            return false;
        }

        final boolean behindFullscreenActivity = stack.checkBehindFullscreenActivity(
                this, null /* handleBehindFullscreenActivity */);
        return shouldBeVisible(behindFullscreenActivity, false /* ignoringKeyguard */);
    }

    void makeVisibleIfNeeded(ActivityRecord starting, boolean reportToClient) {
        // This activity is not currently visible, but is running. Tell it to become visible.
        if (mState == RESUMED || this == starting) {
            if (DEBUG_VISIBILITY) Slog.d(TAG_VISIBILITY,
                    "Not making visible, r=" + this + " state=" + mState + " starting=" + starting);
            return;
        }

        // If this activity is paused, tell it to now show its window.
        if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY,
                "Making visible and scheduling visibility: " + this);
        final ActivityStack stack = getRootTask();
        try {
            if (stack.mTranslucentActivityWaiting != null) {
                updateOptionsLocked(returningOptions);
                stack.mUndrawnActivitiesBelowTopTranslucent.add(this);
            }
            setVisibility(true);
            mSetToSleep = false;
            app.postPendingUiCleanMsg(true);
            if (reportToClient) {
                mClientVisibilityDeferred = false;
                makeActiveIfNeeded(starting);
            } else {
                mClientVisibilityDeferred = true;
            }
            // The activity may be waiting for stop, but that is no longer appropriate for it.
            mStackSupervisor.mStoppingActivities.remove(this);
        } catch (Exception e) {
            // Just skip on any failure; we'll make it visible when it next restarts.
            Slog.w(TAG, "Exception thrown making visible: " + intent.getComponent(), e);
        }
        handleAlreadyVisible();
    }

    void makeInvisible() {
        if (!mVisibleRequested) {
            if (DEBUG_VISIBILITY) Slog.v(TAG_VISIBILITY, "Already invisible: " + this);
            return;
        }
        // Now for any activities that aren't visible to the user, make sure they no longer are
        // keeping the screen frozen.
        if (DEBUG_VISIBILITY) {
            Slog.v(TAG_VISIBILITY, "Making invisible: " + this + ", state=" + getState());
        }
        try {
            final boolean canEnterPictureInPicture = checkEnterPictureInPictureState(
                    "makeInvisible", true /* beforeStopping */);
            // Defer telling the client it is hidden if it can enter Pip and isn't current paused,
            // stopped or stopping. This gives it a chance to enter Pip in onPause().
            // TODO: There is still a question surrounding activities in multi-window mode that want
            // to enter Pip after they are paused, but are still visible. I they should be okay to
            // enter Pip in those cases, but not "auto-Pip" which is what this condition covers and
            // the current contract for "auto-Pip" is that the app should enter it before onPause
            // returns. Just need to confirm this reasoning makes sense.
            final boolean deferHidingClient = canEnterPictureInPicture
                    && !isState(STARTED, STOPPING, STOPPED, PAUSED);
            setDeferHidingClient(deferHidingClient);
            setVisibility(false);

            switch (getState()) {
                case STOPPING:
                case STOPPED:
                    // Reset the flag indicating that an app can enter picture-in-picture once the
                    // activity is hidden
                    supportsEnterPipOnTaskSwitch = false;
                    break;
                case RESUMED:
                    // If the app is capable of entering PIP, we should try pausing it now
                    // so it can PIP correctly.
                    if (deferHidingClient) {
                        getRootTask().startPausingLocked(
                                mStackSupervisor.mUserLeaving /* userLeaving */,
                                false /* uiSleeping */, null /* resuming */);
                        break;
                    }
                case INITIALIZING:
                case PAUSING:
                case PAUSED:
                case STARTED:
                    addToStopping(true /* scheduleIdle */,
                            canEnterPictureInPicture /* idleDelayed */, "makeInvisible");
                    break;

                default:
                    break;
            }
        } catch (Exception e) {
            // Just skip on any failure; we'll make it visible when it next restarts.
            Slog.w(TAG, "Exception thrown making hidden: " + intent.getComponent(), e);
        }
    }

    /**
     * Make activity resumed or paused if needed.
     * @param activeActivity an activity that is resumed or just completed pause action.
     *                       We won't change the state of this activity.
     */
    boolean makeActiveIfNeeded(ActivityRecord activeActivity) {
        if (shouldResumeActivity(activeActivity)) {
            if (DEBUG_VISIBILITY) {
                Slog.v(TAG_VISIBILITY, "Resume visible activity, " + this);
            }
            return getRootTask().resumeTopActivityUncheckedLocked(activeActivity /* prev */,
                    null /* options */);
        } else if (shouldPauseActivity(activeActivity)) {
            if (DEBUG_VISIBILITY) {
                Slog.v(TAG_VISIBILITY, "Pause visible activity, " + this);
            }
            // An activity must be in the {@link PAUSING} state for the system to validate
            // the move to {@link PAUSED}.
            setState(PAUSING, "makeActiveIfNeeded");
            try {
                mAtmService.getLifecycleManager().scheduleTransaction(app.getThread(), appToken,
                        PauseActivityItem.obtain(finishing, false /* userLeaving */,
                                configChangeFlags, false /* dontReport */));
            } catch (Exception e) {
                Slog.w(TAG, "Exception thrown sending pause: " + intent.getComponent(), e);
            }
        } else if (shouldStartActivity()) {
            if (DEBUG_VISIBILITY) {
                Slog.v(TAG_VISIBILITY, "Start visible activity, " + this);
            }
            setState(STARTED, "makeActiveIfNeeded");
            try {
                mAtmService.getLifecycleManager().scheduleTransaction(app.getThread(), appToken,
                        StartActivityItem.obtain());
            } catch (Exception e) {
                Slog.w(TAG, "Exception thrown sending start: " + intent.getComponent(), e);
            }
            // The activity may be waiting for stop, but that is no longer appropriate if we are
            // starting the activity again
            mStackSupervisor.mStoppingActivities.remove(this);
        }
        return false;
    }

    /**
     * Check if activity should be moved to PAUSED state. The activity:
     * - should be eligible to be made active (see {@link #shouldMakeActive(ActivityRecord)})
     * - should be non-focusable
     * - should not be currently pausing or paused
     * @param activeActivity the activity that is active or just completed pause action. We won't
     *                       resume if this activity is active.
     */
    @VisibleForTesting
    boolean shouldPauseActivity(ActivityRecord activeActivity) {
        return shouldMakeActive(activeActivity) && !isFocusable() && !isState(PAUSING, PAUSED)
                // We will only allow pausing if results is null, otherwise it will cause this
                // activity to resume before getting result
                && (results == null);
    }

    /**
     * Check if activity should be moved to RESUMED state.
     * See {@link #shouldBeResumed(ActivityRecord)}
     * @param activeActivity the activity that is active or just completed pause action. We won't
     *                       resume if this activity is active.
     */
    @VisibleForTesting
    boolean shouldResumeActivity(ActivityRecord activeActivity) {
        return shouldBeResumed(activeActivity) && !isState(RESUMED);
    }

    /**
     * Check if activity should be RESUMED now. The activity:
     * - should be eligible to be made active (see {@link #shouldMakeActive(ActivityRecord)})
     * - should be focusable
     */
    private boolean shouldBeResumed(ActivityRecord activeActivity) {
        return shouldMakeActive(activeActivity) && isFocusable()
                && getTask().getVisibility(activeActivity) == STACK_VISIBILITY_VISIBLE
                && canResumeByCompat();
    }

    /**
     * Check if activity should be moved to STARTED state.
     * NOTE: This will not check if activity should be made paused or resumed first, so it must only
     * be called after checking with {@link #shouldResumeActivity(ActivityRecord)}
     * and {@link #shouldPauseActivity(ActivityRecord)}.
     */
    private boolean shouldStartActivity() {
        return mVisibleRequested && (isState(STOPPED) || isState(STOPPING));
    }

    /**
     * Check if activity is eligible to be made active (resumed of paused). The activity:
     * - should be paused, stopped or stopping
     * - should not be the currently active one or launching behind other tasks
     * - should be either the topmost in task, or right below the top activity that is finishing
     * If all of these conditions are not met at the same time, the activity cannot be made active.
     */
    @VisibleForTesting
    boolean shouldMakeActive(ActivityRecord activeActivity) {
        // If the activity is stopped, stopping, cycle to an active state. We avoid doing
        // this when there is an activity waiting to become translucent as the extra binder
        // calls will lead to noticeable jank. A later call to
        // ActivityStack#ensureActivitiesVisible will bring the activity to a proper
        // active state.
        if (!isState(STARTED, RESUMED, PAUSED, STOPPED, STOPPING)
                || getRootTask().mTranslucentActivityWaiting != null) {
            return false;
        }

        if (this == activeActivity) {
            return false;
        }

        if (!mStackSupervisor.readyToResume()) {
            // Making active is currently deferred (e.g. because an activity launch is in progress).
            return false;
        }

        if (this.mLaunchTaskBehind) {
            // This activity is being launched from behind, which means that it's not intended to be
            // presented to user right now, even if it's set to be visible.
            return false;
        }

        // Check if position in task allows to become paused
        if (!task.hasChild(this)) {
            throw new IllegalStateException("Activity not found in its task");
        }
        return task.topRunningActivity() == this;
    }

    void handleAlreadyVisible() {
        stopFreezingScreenLocked(false);
        try {
            if (returningOptions != null) {
                app.getThread().scheduleOnNewActivityOptions(appToken, returningOptions.toBundle());
            }
        } catch(RemoteException e) {
        }
    }

    static void activityResumedLocked(IBinder token) {
        final ActivityRecord r = ActivityRecord.forTokenLocked(token);
        if (DEBUG_SAVED_STATE) Slog.i(TAG_STATES, "Resumed activity; dropping state of: " + r);
        if (r == null) {
            // If an app reports resumed after a long delay, the record on server side might have
            // been removed (e.g. destroy timeout), so the token could be null.
            return;
        }
        r.setSavedState(null /* savedState */);

        final DisplayContent display = r.getDisplay();
        if (display != null) {
            display.handleActivitySizeCompatModeIfNeeded(r);
        }

        r.getDisplayContent().mUnknownAppVisibilityController.notifyAppResumedFinished(r);
    }

    /**
     * Once we know that we have asked an application to put an activity in the resumed state
     * (either by launching it or explicitly telling it), this function updates the rest of our
     * state to match that fact.
     */
    void completeResumeLocked() {
        final boolean wasVisible = mVisibleRequested;
        setVisibility(true);
        if (!wasVisible) {
            // Visibility has changed, so take a note of it so we call the TaskStackChangedListener
            mStackSupervisor.mAppVisibilitiesChangedSinceLastPause = true;
        }
        idle = false;
        results = null;
        if (newIntents != null && newIntents.size() > 0) {
            mLastNewIntent = newIntents.get(newIntents.size() - 1);
        }
        newIntents = null;
        stopped = false;

        if (isActivityTypeHome()) {
            mStackSupervisor.updateHomeProcess(task.getBottomMostActivity().app);
        }

        if (nowVisible) {
            mStackSupervisor.stopWaitingForActivityVisible(this);
        }

        // Schedule an idle timeout in case the app doesn't do it for us.
        mStackSupervisor.scheduleIdleTimeout(this);

        mStackSupervisor.reportResumedActivityLocked(this);

        resumeKeyDispatchingLocked();
        final ActivityStack stack = getRootTask();
        mStackSupervisor.mNoAnimActivities.clear();

        // Mark the point when the activity is resuming
        // TODO: To be more accurate, the mark should be before the onCreate,
        //       not after the onResume. But for subsequent starts, onResume is fine.
        if (hasProcess()) {
            cpuTimeAtResume = app.getCpuTime();
        } else {
            cpuTimeAtResume = 0; // Couldn't get the cpu time of process
        }

        returningOptions = null;

        if (canTurnScreenOn()) {
            mStackSupervisor.wakeUp("turnScreenOnFlag");
        } else {
            // If the screen is going to turn on because the caller explicitly requested it and
            // the keyguard is not showing don't attempt to sleep. Otherwise the Activity will
            // pause and then resume again later, which will result in a double life-cycle event.
            stack.checkReadyForSleep();
        }
    }

    void activityPaused(boolean timeout) {
        if (DEBUG_PAUSE) Slog.v(TAG_PAUSE,
                "Activity paused: token=" + appToken + ", timeout=" + timeout);

        final ActivityStack stack = getStack();

        if (stack != null) {
            removePauseTimeout();

            if (stack.mPausingActivity == this) {
                if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to PAUSED: " + this
                        + (timeout ? " (due to timeout)" : " (pause complete)"));
                mAtmService.deferWindowLayout();
                try {
                    stack.completePauseLocked(true /* resumeNext */, null /* resumingActivity */);
                } finally {
                    mAtmService.continueWindowLayout();
                }
                return;
            } else {
                EventLogTags.writeWmFailedToPause(mUserId, System.identityHashCode(this),
                        shortComponentName, stack.mPausingActivity != null
                                ? stack.mPausingActivity.shortComponentName : "(none)");
                if (isState(PAUSING)) {
                    setState(PAUSED, "activityPausedLocked");
                    if (finishing) {
                        if (DEBUG_PAUSE) Slog.v(TAG,
                                "Executing finish of failed to pause activity: " + this);
                        completeFinishing("activityPausedLocked");
                    }
                }
            }
        }

        mRootWindowContainer.ensureActivitiesVisible(null, 0, !PRESERVE_WINDOWS);
    }

    /**
     * Schedule a pause timeout in case the app doesn't respond. We don't give it much time because
     * this directly impacts the responsiveness seen by the user.
     */
    void schedulePauseTimeout() {
        pauseTime = SystemClock.uptimeMillis();
        mAtmService.mH.postDelayed(mPauseTimeoutRunnable, PAUSE_TIMEOUT);
        if (DEBUG_PAUSE) Slog.v(TAG_PAUSE, "Waiting for pause to complete...");
    }

    private void removePauseTimeout() {
        mAtmService.mH.removeCallbacks(mPauseTimeoutRunnable);
    }

    private void removeDestroyTimeout() {
        mAtmService.mH.removeCallbacks(mDestroyTimeoutRunnable);
    }

    private void removeStopTimeout() {
        mAtmService.mH.removeCallbacks(mStopTimeoutRunnable);
    }

    void removeTimeouts() {
        mStackSupervisor.removeIdleTimeoutForActivity(this);
        removePauseTimeout();
        removeStopTimeout();
        removeDestroyTimeout();
        finishLaunchTickingLocked();
    }

    void stopIfPossible() {
        if (DEBUG_SWITCH) Slog.d(TAG_SWITCH, "Stopping: " + this);
        final ActivityStack stack = getRootTask();
        if (isNoHistory()) {
            if (!finishing) {
                if (!stack.shouldSleepActivities()) {
                    if (DEBUG_STATES) Slog.d(TAG_STATES, "no-history finish of " + this);
                    if (finishIfPossible("stop-no-history", false /* oomAdj */)
                            != FINISH_RESULT_CANCELLED) {
                        resumeKeyDispatchingLocked();
                        return;
                    }
                } else {
                    if (DEBUG_STATES) {
                        Slog.d(TAG_STATES, "Not finishing noHistory " + this
                                + " on stop because we're just sleeping");
                    }
                }
            }
        }

        if (!attachedToProcess()) {
            return;
        }
        resumeKeyDispatchingLocked();
        try {
            stopped = false;
            if (DEBUG_STATES) {
                Slog.v(TAG_STATES, "Moving to STOPPING: " + this + " (stop requested)");
            }
            setState(STOPPING, "stopIfPossible");
            if (DEBUG_VISIBILITY) {
                Slog.v(TAG_VISIBILITY, "Stopping:" + this);
            }
            EventLogTags.writeWmStopActivity(
                    mUserId, System.identityHashCode(this), shortComponentName);
            mAtmService.getLifecycleManager().scheduleTransaction(app.getThread(), appToken,
                    StopActivityItem.obtain(configChangeFlags));

            if (stack.shouldSleepOrShutDownActivities()) {
                setSleeping(true);
            }
            mAtmService.mH.postDelayed(mStopTimeoutRunnable, STOP_TIMEOUT);
        } catch (Exception e) {
            // Maybe just ignore exceptions here...  if the process has crashed, our death
            // notification will clean things up.
            Slog.w(TAG, "Exception thrown during pause", e);
            // Just in case, assume it to be stopped.
            stopped = true;
            if (DEBUG_STATES) Slog.v(TAG_STATES, "Stop failed; moving to STOPPED: " + this);
            setState(STOPPED, "stopIfPossible");
            if (deferRelaunchUntilPaused) {
                destroyImmediately(true /* removeFromApp */, "stop-except");
            }
        }
    }

    void activityStopped(Bundle newIcicle, PersistableBundle newPersistentState,
            CharSequence description) {
        final ActivityStack stack = getRootTask();
        final boolean isStopping = mState == STOPPING;
        if (!isStopping && mState != RESTARTING_PROCESS) {
            Slog.i(TAG, "Activity reported stop, but no longer stopping: " + this);
            removeStopTimeout();
            return;
        }
        if (newPersistentState != null) {
            mPersistentState = newPersistentState;
            mAtmService.notifyTaskPersisterLocked(task, false);
        }

        if (newIcicle != null) {
            // If icicle is null, this is happening due to a timeout, so we haven't really saved
            // the state.
            setSavedState(newIcicle);
            launchCount = 0;
            updateTaskDescription(description);
        }
        if (DEBUG_SAVED_STATE) Slog.i(TAG_SAVED_STATE, "Saving icicle of " + this + ": " + mIcicle);
        if (!stopped) {
            if (DEBUG_STATES) Slog.v(TAG_STATES, "Moving to STOPPED: " + this + " (stop complete)");
            removeStopTimeout();
            stopped = true;
            if (isStopping) {
                setState(STOPPED, "activityStoppedLocked");
            }

            notifyAppStopped();

            if (finishing) {
                clearOptionsLocked();
            } else {
                if (deferRelaunchUntilPaused) {
                    destroyImmediately(true /* removeFromApp */, "stop-config");
                    mRootWindowContainer.resumeFocusedStacksTopActivities();
                } else {
                    mRootWindowContainer.updatePreviousProcess(this);
                }
            }
        }
    }

    void addToStopping(boolean scheduleIdle, boolean idleDelayed, String reason) {
        if (!mStackSupervisor.mStoppingActivities.contains(this)) {
            EventLogTags.writeWmAddToStopping(mUserId, System.identityHashCode(this),
                    shortComponentName, reason);
            mStackSupervisor.mStoppingActivities.add(this);
        }

        final ActivityStack stack = getRootTask();
        // If we already have a few activities waiting to stop, then give up on things going idle
        // and start clearing them out. Or if r is the last of activity of the last task the stack
        // will be empty and must be cleared immediately.
        boolean forceIdle = mStackSupervisor.mStoppingActivities.size() > MAX_STOPPING_TO_FORCE
                || (isRootOfTask() && stack.getChildCount() <= 1);
        if (scheduleIdle || forceIdle) {
            if (DEBUG_PAUSE) {
                Slog.v(TAG_PAUSE, "Scheduling idle now: forceIdle=" + forceIdle
                        + "immediate=" + !idleDelayed);
            }
            if (!idleDelayed) {
                mStackSupervisor.scheduleIdle();
            } else {
                mStackSupervisor.scheduleIdleTimeout(this);
            }
        } else {
            stack.checkReadyForSleep();
        }
    }

    void startLaunchTickingLocked() {
        if (Build.IS_USER) {
            return;
        }
        if (launchTickTime == 0) {
            launchTickTime = SystemClock.uptimeMillis();
            continueLaunchTicking();
        }
    }

    private boolean continueLaunchTicking() {
        if (launchTickTime == 0) {
            return false;
        }

        final ActivityStack stack = getRootTask();
        if (stack == null) {
            return false;
        }

        stack.removeLaunchTickMessages();
        mAtmService.mH.postDelayed(mLaunchTickRunnable, LAUNCH_TICK);
        return true;
    }

    void removeLaunchTickRunnable() {
        mAtmService.mH.removeCallbacks(mLaunchTickRunnable);
    }

    void finishLaunchTickingLocked() {
        launchTickTime = 0;
        final ActivityStack stack = getRootTask();
        if (stack == null) {
            return;
        }
        stack.removeLaunchTickMessages();
    }

    boolean mayFreezeScreenLocked() {
        return mayFreezeScreenLocked(app);
    }

    private boolean mayFreezeScreenLocked(WindowProcessController app) {
        // Only freeze the screen if this activity is currently attached to
        // an application, and that application is not blocked or unresponding.
        // In any other case, we can't count on getting the screen unfrozen,
        // so it is best to leave as-is.
        return hasProcess() && !app.isCrashing() && !app.isNotResponding();
    }

    void startFreezingScreenLocked(int configChanges) {
        startFreezingScreenLocked(app, configChanges);
    }

    void startFreezingScreenLocked(WindowProcessController app, int configChanges) {
        if (mayFreezeScreenLocked(app)) {
            if (getParent() == null) {
                Slog.w(TAG_WM,
                        "Attempted to freeze screen with non-existing app token: " + appToken);
                return;
            }

            // Window configuration changes only effect windows, so don't require a screen freeze.
            int freezableConfigChanges = configChanges & ~(CONFIG_WINDOW_CONFIGURATION);
            if (freezableConfigChanges == 0 && okToDisplay()) {
                ProtoLog.v(WM_DEBUG_ORIENTATION, "Skipping set freeze of %s", appToken);
                return;
            }

            startFreezingScreen();
        }
    }

    void startFreezingScreen() {
        startFreezingScreen(ROTATION_UNDEFINED /* overrideOriginalDisplayRotation */);
    }

    void startFreezingScreen(int overrideOriginalDisplayRotation) {
        ProtoLog.i(WM_DEBUG_ORIENTATION,
                "Set freezing of %s: visible=%b freezing=%b visibleRequested=%b. %s",
                appToken, isVisible(), mFreezingScreen, mVisibleRequested,
                new RuntimeException().fillInStackTrace());
        if (!mVisibleRequested) {
            return;
        }

        // If the override is given, the rotation of display doesn't change but we still want to
        // cover the activity whose configuration is changing by freezing the display and running
        // the rotation animation.
        final boolean forceRotation = overrideOriginalDisplayRotation != ROTATION_UNDEFINED;
        if (!mFreezingScreen) {
            mFreezingScreen = true;
            mWmService.registerAppFreezeListener(this);
            mWmService.mAppsFreezingScreen++;
            if (mWmService.mAppsFreezingScreen == 1) {
                if (forceRotation) {
                    // Make sure normal rotation animation will be applied.
                    mDisplayContent.getDisplayRotation().cancelSeamlessRotation();
                }
                mWmService.startFreezingDisplay(0 /* exitAnim */, 0 /* enterAnim */,
                        mDisplayContent, overrideOriginalDisplayRotation);
                mWmService.mH.removeMessages(H.APP_FREEZE_TIMEOUT);
                mWmService.mH.sendEmptyMessageDelayed(H.APP_FREEZE_TIMEOUT, 2000);
            }
        }
        if (forceRotation) {
            // The rotation of the real display won't change, so in order to unfreeze the screen
            // via {@link #checkAppWindowsReadyToShow}, the windows have to be able to call
            // {@link WindowState#reportResized} (it is skipped if the window is freezing) to update
            // the drawn state.
            return;
        }
        final int count = mChildren.size();
        for (int i = 0; i < count; i++) {
            final WindowState w = mChildren.get(i);
            w.onStartFreezingScreen();
        }
    }

    boolean isFreezingScreen() {
        return mFreezingScreen;
    }

    @Override
    public void onAppFreezeTimeout() {
        Slog.w(TAG_WM, "Force clearing freeze: " + this);
        stopFreezingScreen(true, true);
    }

    void stopFreezingScreenLocked(boolean force) {
        if (force || frozenBeforeDestroy) {
            frozenBeforeDestroy = false;
            if (getParent() == null) {
                return;
            }
            ProtoLog.v(WM_DEBUG_ORIENTATION,
                        "Clear freezing of %s: visible=%b freezing=%b", appToken,
                                isVisible(), isFreezingScreen());
            stopFreezingScreen(true, force);
        }
    }

    void stopFreezingScreen(boolean unfreezeSurfaceNow, boolean force) {
        if (!mFreezingScreen) {
            return;
        }
        ProtoLog.v(WM_DEBUG_ORIENTATION,
                "Clear freezing of %s force=%b", this, force);
        final int count = mChildren.size();
        boolean unfrozeWindows = false;
        for (int i = 0; i < count; i++) {
            final WindowState w = mChildren.get(i);
            unfrozeWindows |= w.onStopFreezingScreen();
        }
        if (force || unfrozeWindows) {
            ProtoLog.v(WM_DEBUG_ORIENTATION, "No longer freezing: %s", this);
            mFreezingScreen = false;
            mWmService.unregisterAppFreezeListener(this);
            mWmService.mAppsFreezingScreen--;
            mWmService.mLastFinishedFreezeSource = this;
        }
        if (unfreezeSurfaceNow) {
            if (unfrozeWindows) {
                mWmService.mWindowPlacerLocked.performSurfacePlacement();
            }
            mWmService.stopFreezingDisplayLocked();
        }
    }

    void reportFullyDrawnLocked(boolean restoredFromBundle) {
        final TransitionInfoSnapshot info = mStackSupervisor
            .getActivityMetricsLogger().logAppTransitionReportedDrawn(this, restoredFromBundle);
        if (info != null) {
            mStackSupervisor.reportActivityLaunchedLocked(false /* timeout */, this,
                    info.windowsFullyDrawnDelayMs, info.getLaunchState());
        }
    }

    void onFirstWindowDrawn(WindowState win, WindowStateAnimator winAnimator) {
        firstWindowDrawn = true;

        // We now have a good window to show, remove dead placeholders
        removeDeadWindows();

        if (startingWindow != null) {
            ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Finish starting %s"
                    + ": first real window is shown, no animation", win.mToken);
            // If this initial window is animating, stop it -- we will do an animation to reveal
            // it from behind the starting window, so there is no need for it to also be doing its
            // own stuff.
            win.cancelAnimation();
        }
        removeStartingWindow();
        updateReportedVisibilityLocked();
    }

    void onStartingWindowDrawn() {
        if (task != null) {
            task.setHasBeenVisible(true);
        }
    }

    /** Called when the windows associated app window container are drawn. */
    void onWindowsDrawn(boolean drawn, long timestampNs) {
        mDrawn = drawn;
        if (!drawn) {
            return;
        }
        final TransitionInfoSnapshot info = mStackSupervisor
                .getActivityMetricsLogger().notifyWindowsDrawn(this, timestampNs);
        final boolean validInfo = info != null;
        final int windowsDrawnDelayMs = validInfo ? info.windowsDrawnDelayMs : INVALID_DELAY;
        final @LaunchState int launchState = validInfo ? info.getLaunchState() : -1;
        // The activity may have been requested to be invisible (another activity has been launched)
        // so there is no valid info. But if it is the current top activity (e.g. sleeping), the
        // invalid state is still reported to make sure the waiting result is notified.
        if (validInfo || this == getDisplayArea().topRunningActivity()) {
            mStackSupervisor.reportActivityLaunchedLocked(false /* timeout */, this,
                    windowsDrawnDelayMs, launchState);
            mStackSupervisor.stopWaitingForActivityVisible(this, windowsDrawnDelayMs);
        }
        finishLaunchTickingLocked();
        if (task != null) {
            task.setHasBeenVisible(true);
        }
    }

    /** Called when the windows associated app window container are visible. */
    void onWindowsVisible() {
        if (DEBUG_VISIBILITY) Slog.v(TAG_WM, "Reporting visible in " + appToken);
        mStackSupervisor.stopWaitingForActivityVisible(this);
        if (DEBUG_SWITCH) Log.v(TAG_SWITCH, "windowsVisibleLocked(): " + this);
        if (!nowVisible) {
            nowVisible = true;
            lastVisibleTime = SystemClock.uptimeMillis();
            mAtmService.scheduleAppGcsLocked();
        }
    }

    /** Called when the windows associated app window container are no longer visible. */
    void onWindowsGone() {
        if (DEBUG_VISIBILITY) Slog.v(TAG_WM, "Reporting gone in " + appToken);
        if (DEBUG_SWITCH) Log.v(TAG_SWITCH, "windowsGone(): " + this);
        nowVisible = false;
    }

    @Override
    void checkAppWindowsReadyToShow() {
        if (allDrawn == mLastAllDrawn) {
            return;
        }

        mLastAllDrawn = allDrawn;
        if (!allDrawn) {
            return;
        }

        // The token has now changed state to having all windows shown...  what to do, what to do?
        if (mFreezingScreen) {
            showAllWindowsLocked();
            stopFreezingScreen(false, true);
            ProtoLog.i(WM_DEBUG_ORIENTATION,
                    "Setting mOrientationChangeComplete=true because wtoken %s "
                            + "numInteresting=%d numDrawn=%d",
                    this, mNumInterestingWindows, mNumDrawnWindows);
            // This will set mOrientationChangeComplete and cause a pass through layout.
            setAppLayoutChanges(FINISH_LAYOUT_REDO_WALLPAPER,
                    "checkAppWindowsReadyToShow: freezingScreen");
        } else {
            setAppLayoutChanges(FINISH_LAYOUT_REDO_ANIM, "checkAppWindowsReadyToShow");

            // We can now show all of the drawn windows!
            if (!getDisplayContent().mOpeningApps.contains(this) && canShowWindows()) {
                showAllWindowsLocked();
            }
        }
    }

    /**
     * This must be called while inside a transaction.
     */
    void showAllWindowsLocked() {
        forAllWindows(windowState -> {
            if (DEBUG_VISIBILITY) Slog.v(TAG, "performing show on: " + windowState);
            windowState.performShowLocked();
        }, false /* traverseTopToBottom */);
    }

    void updateReportedVisibilityLocked() {
        if (appToken == null) {
            return;
        }

        if (DEBUG_VISIBILITY) Slog.v(TAG, "Update reported visibility: " + this);
        final int count = mChildren.size();

        mReportedVisibilityResults.reset();

        for (int i = 0; i < count; i++) {
            final WindowState win = mChildren.get(i);
            win.updateReportedVisibility(mReportedVisibilityResults);
        }

        int numInteresting = mReportedVisibilityResults.numInteresting;
        int numVisible = mReportedVisibilityResults.numVisible;
        int numDrawn = mReportedVisibilityResults.numDrawn;
        boolean nowGone = mReportedVisibilityResults.nowGone;

        boolean nowDrawn = numInteresting > 0 && numDrawn >= numInteresting;
        boolean nowVisible = numInteresting > 0 && numVisible >= numInteresting && isVisible();
        if (!nowGone) {
            // If the app is not yet gone, then it can only become visible/drawn.
            if (!nowDrawn) {
                nowDrawn = reportedDrawn;
            }
            if (!nowVisible) {
                nowVisible = reportedVisible;
            }
        }
        if (DEBUG_VISIBILITY) Slog.v(TAG, "VIS " + this + ": interesting="
                + numInteresting + " visible=" + numVisible);
        if (nowDrawn != reportedDrawn) {
            onWindowsDrawn(nowDrawn, SystemClock.elapsedRealtimeNanos());
            reportedDrawn = nowDrawn;
        }
        if (nowVisible != reportedVisible) {
            if (DEBUG_VISIBILITY) Slog.v(TAG,
                    "Visibility changed in " + this + ": vis=" + nowVisible);
            reportedVisible = nowVisible;
            if (nowVisible) {
                onWindowsVisible();
            } else {
                onWindowsGone();
            }
        }
    }

    boolean isClientVisible() {
        return mClientVisible;
    }

    void setClientVisible(boolean clientVisible) {
        if (mClientVisible == clientVisible || (!clientVisible && mDeferHidingClient)) {
            return;
        }
        ProtoLog.v(WM_DEBUG_APP_TRANSITIONS,
                "setClientVisible: %s clientVisible=%b Callers=%s", this, clientVisible,
                Debug.getCallers(5));
        mClientVisible = clientVisible;
        sendAppVisibilityToClients();
    }

    /**
     * Updated this app token tracking states for interesting and drawn windows based on the window.
     *
     * @return Returns true if the input window is considered interesting and drawn while all the
     *         windows in this app token where not considered drawn as of the last pass.
     */
    boolean updateDrawnWindowStates(WindowState w) {
        w.setDrawnStateEvaluated(true /*evaluated*/);

        if (DEBUG_STARTING_WINDOW_VERBOSE && w == startingWindow) {
            Slog.d(TAG, "updateWindows: starting " + w + " isOnScreen=" + w.isOnScreen()
                    + " allDrawn=" + allDrawn + " freezingScreen=" + mFreezingScreen);
        }

        if (allDrawn && !mFreezingScreen) {
            return false;
        }

        if (mLastTransactionSequence != mWmService.mTransactionSequence) {
            mLastTransactionSequence = mWmService.mTransactionSequence;
            mNumDrawnWindows = 0;

            // There is the main base application window, even if it is exiting, wait for it
            mNumInterestingWindows = findMainWindow(false /* includeStartingApp */) != null ? 1 : 0;
        }

        final WindowStateAnimator winAnimator = w.mWinAnimator;

        boolean isInterestingAndDrawn = false;

        if (!allDrawn && w.mightAffectAllDrawn()) {
            if (DEBUG_VISIBILITY || WM_DEBUG_ORIENTATION.isLogToLogcat()) {
                Slog.v(TAG, "Eval win " + w + ": isDrawn=" + w.isDrawnLw()
                        + ", isAnimationSet=" + isAnimating(TRANSITION | PARENTS));
                if (!w.isDrawnLw()) {
                    Slog.v(TAG, "Not displayed: s=" + winAnimator.mSurfaceController
                            + " pv=" + w.isVisibleByPolicy()
                            + " mDrawState=" + winAnimator.drawStateToString()
                            + " ph=" + w.isParentWindowHidden() + " th=" + mVisibleRequested
                            + " a=" + isAnimating(TRANSITION | PARENTS));
                }
            }

            if (w != startingWindow) {
                if (w.isInteresting()) {
                    // Add non-main window as interesting since the main app has already been added
                    if (findMainWindow(false /* includeStartingApp */) != w) {
                        mNumInterestingWindows++;
                    }
                    if (w.isDrawnLw()) {
                        mNumDrawnWindows++;

                        if (DEBUG_VISIBILITY || WM_DEBUG_ORIENTATION.isLogToLogcat()) {
                            Slog.v(TAG, "tokenMayBeDrawn: "
                                    + this + " w=" + w + " numInteresting=" + mNumInterestingWindows
                                    + " freezingScreen=" + mFreezingScreen
                                    + " mAppFreezing=" + w.mAppFreezing);
                        }

                        isInterestingAndDrawn = true;
                    }
                }
            } else if (w.isDrawnLw()) {
                // The starting window for this container is drawn.
                mStackSupervisor.getActivityMetricsLogger().notifyStartingWindowDrawn(this);
                startingDisplayed = true;
            }
        }

        return isInterestingAndDrawn;
    }

    /**
     * Called when the key dispatching to a window associated with the app window container
     * timed-out.
     *
     * @param reason The reason for the key dispatching time out.
     * @param windowPid The pid of the window key dispatching timed out on.
     * @return True if input dispatching should be aborted.
     */
    public boolean keyDispatchingTimedOut(String reason, int windowPid) {
        ActivityRecord anrActivity;
        WindowProcessController anrApp;
        boolean windowFromSameProcessAsActivity;
        synchronized (mAtmService.mGlobalLock) {
            anrActivity = getWaitingHistoryRecordLocked();
            anrApp = app;
            windowFromSameProcessAsActivity =
                    !hasProcess() || app.getPid() == windowPid || windowPid == INVALID_PID;
        }

        if (windowFromSameProcessAsActivity) {
            return mAtmService.mAmInternal.inputDispatchingTimedOut(anrApp.mOwner,
                    anrActivity.shortComponentName, anrActivity.info.applicationInfo,
                    shortComponentName, app, false, reason);
        } else {
            // In this case another process added windows using this activity token. So, we call the
            // generic service input dispatch timed out method so that the right process is blamed.
            return mAtmService.mAmInternal.inputDispatchingTimedOut(
                    windowPid, false /* aboveSystem */, reason) < 0;
        }
    }

    private ActivityRecord getWaitingHistoryRecordLocked() {
        // First find the real culprit...  if this activity has stopped, then the key dispatching
        // timeout should not be caused by this.
        if (stopped) {
            final ActivityStack stack = mRootWindowContainer.getTopDisplayFocusedStack();
            if (stack == null) {
                return this;
            }
            // Try to use the one which is closest to top.
            ActivityRecord r = stack.getResumedActivity();
            if (r == null) {
                r = stack.mPausingActivity;
            }
            if (r != null) {
                return r;
            }
        }
        return this;
    }

    /** Checks whether the activity should be shown for current user. */
    public boolean okToShowLocked() {
        // We cannot show activities when the device is locked and the application is not
        // encryption aware.
        if (!StorageManager.isUserKeyUnlocked(mUserId)
                && !info.applicationInfo.isEncryptionAware()) {
            return false;
        }

        return (info.flags & FLAG_SHOW_FOR_ALL_USERS) != 0
                || (mStackSupervisor.isCurrentProfileLocked(mUserId)
                && mAtmService.mAmInternal.isUserRunning(mUserId, 0 /* flags */));
    }

    boolean canBeTopRunning() {
        return !finishing && okToShowLocked();
    }

    /**
     * This method will return true if the activity is either visible, is becoming visible, is
     * currently pausing, or is resumed.
     */
    public boolean isInterestingToUserLocked() {
        return mVisibleRequested || nowVisible || mState == PAUSING || mState == RESUMED;
    }

    void setSleeping(boolean sleeping) {
        mSetToSleep = sleeping;
    }

    static int getTaskForActivityLocked(IBinder token, boolean onlyRoot) {
        final ActivityRecord r = ActivityRecord.forTokenLocked(token);
        if (r == null || r.getParent() == null) {
            return INVALID_TASK_ID;
        }
        final Task task = r.task;
        if (onlyRoot && r.compareTo(task.getRootActivity(
                false /*ignoreRelinquishIdentity*/, true /*setToBottomIfNone*/)) > 0) {
            return INVALID_TASK_ID;
        }
        return task.mTaskId;
    }

    static ActivityRecord isInStackLocked(IBinder token) {
        final ActivityRecord r = ActivityRecord.forTokenLocked(token);
        return (r != null) ? r.getRootTask().isInTask(r) : null;
    }

    static ActivityStack getStackLocked(IBinder token) {
        final ActivityRecord r = ActivityRecord.isInStackLocked(token);
        if (r != null) {
            return r.getRootTask();
        }
        return null;
    }

    /**
     * @return display id to which this record is attached,
     *         {@link android.view.Display#INVALID_DISPLAY} if not attached.
     */
    int getDisplayId() {
        final ActivityStack stack = getRootTask();
        if (stack == null) {
            return INVALID_DISPLAY;
        }
        return stack.getDisplayId();
    }

    final boolean isDestroyable() {
        if (finishing || !hasProcess()) {
            // This would be redundant.
            return false;
        }
        final ActivityStack stack = getRootTask();
        if (isState(RESUMED) || stack == null || this == stack.mPausingActivity || !mHaveState
                || !stopped) {
            // We're not ready for this kind of thing.
            return false;
        }
        if (mVisibleRequested) {
            // The user would notice this!
            return false;
        }
        return true;
    }

    private static String createImageFilename(long createTime, int taskId) {
        return String.valueOf(taskId) + ACTIVITY_ICON_SUFFIX + createTime +
                IMAGE_EXTENSION;
    }

    void setTaskDescription(TaskDescription _taskDescription) {
        Bitmap icon;
        if (_taskDescription.getIconFilename() == null &&
                (icon = _taskDescription.getIcon()) != null) {
            final String iconFilename = createImageFilename(createTime, task.mTaskId);
            final File iconFile = new File(TaskPersister.getUserImagesDir(task.mUserId),
                    iconFilename);
            final String iconFilePath = iconFile.getAbsolutePath();
            mAtmService.getRecentTasks().saveImage(icon, iconFilePath);
            _taskDescription.setIconFilename(iconFilePath);
        }
        taskDescription = _taskDescription;
        getTask().updateTaskDescription();
    }

    void setVoiceSessionLocked(IVoiceInteractionSession session) {
        voiceSession = session;
        pendingVoiceInteractionStart = false;
    }

    void clearVoiceSessionLocked() {
        voiceSession = null;
        pendingVoiceInteractionStart = false;
    }

    void showStartingWindow(ActivityRecord prev, boolean newTask, boolean taskSwitch) {
        if (mTaskOverlay) {
            // We don't show starting window for overlay activities.
            return;
        }
        if (pendingOptions != null
                && pendingOptions.getAnimationType() == ActivityOptions.ANIM_SCENE_TRANSITION) {
            // Don't show starting window when using shared element transition.
            return;
        }

        final CompatibilityInfo compatInfo =
                mAtmService.compatibilityInfoForPackageLocked(info.applicationInfo);
        final boolean shown = addStartingWindow(packageName, theme,
                compatInfo, nonLocalizedLabel, labelRes, icon, logo, windowFlags,
                prev != null ? prev.appToken : null, newTask, taskSwitch, isProcessRunning(),
                allowTaskSnapshot(),
                mState.ordinal() >= STARTED.ordinal() && mState.ordinal() <= STOPPED.ordinal());
        if (shown) {
            mStartingWindowState = STARTING_WINDOW_SHOWN;
        }
    }

    /**
     * If any activities below the top running one are in the INITIALIZING state and they have a
     * starting window displayed then remove that starting window. It is possible that the activity
     * in this state will never resumed in which case that starting window will be orphaned.
     * <p>
     * It should only be called if this activity is behind other fullscreen activity.
     */
    void cancelInitializing() {
        if (mStartingWindowState == STARTING_WINDOW_SHOWN) {
            // Remove orphaned starting window.
            if (DEBUG_VISIBILITY) Slog.w(TAG_VISIBILITY, "Found orphaned starting window " + this);
            mStartingWindowState = STARTING_WINDOW_REMOVED;
            removeStartingWindow();
        }
        if (isState(INITIALIZING) && !shouldBeVisible(
                true /* behindFullscreenActivity */, true /* ignoringKeyguard */)) {
            // Remove the unknown visibility record because an invisible activity shouldn't block
            // the keyguard transition.
            mDisplayContent.mUnknownAppVisibilityController.appRemovedOrHidden(this);
        }
    }

    void postWindowRemoveStartingWindowCleanup(WindowState win) {
        // TODO: Something smells about the code below...Is there a better way?
        if (startingWindow == win) {
            ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Notify removed startingWindow %s", win);
            removeStartingWindow();
        } else if (mChildren.size() == 0) {
            // If this is the last window and we had requested a starting transition window,
            // well there is no point now.
            ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Nulling last startingData");
            mStartingData = null;
            if (mVisibleSetFromTransferredStartingWindow) {
                // We set the visible state to true for the token from a transferred starting
                // window. We now reset it back to false since the starting window was the last
                // window in the token.
                setVisible(false);
            }
        } else if (mChildren.size() == 1 && startingSurface != null && !isRelaunching()) {
            // If this is the last window except for a starting transition window,
            // we need to get rid of the starting transition.
            ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Last window, removing starting window %s", win);
            removeStartingWindow();
        }
    }

    void removeDeadWindows() {
        for (int winNdx = mChildren.size() - 1; winNdx >= 0; --winNdx) {
            WindowState win = mChildren.get(winNdx);
            if (win.mAppDied) {
                ProtoLog.w(WM_DEBUG_ADD_REMOVE,
                        "removeDeadWindows: %s", win);
                // Set mDestroying, we don't want any animation or delayed removal here.
                win.mDestroying = true;
                // Also removes child windows.
                win.removeIfPossible();
            }
        }
    }

    boolean hasWindowsAlive() {
        for (int i = mChildren.size() - 1; i >= 0; i--) {
            // No need to loop through child windows as the answer should be the same as that of the
            // parent window.
            if (!(mChildren.get(i)).mAppDied) {
                return true;
            }
        }
        return false;
    }

    void setWillReplaceWindows(boolean animate) {
        ProtoLog.d(WM_DEBUG_ADD_REMOVE,
                "Marking app token %s with replacing windows.", this);

        for (int i = mChildren.size() - 1; i >= 0; i--) {
            final WindowState w = mChildren.get(i);
            w.setWillReplaceWindow(animate);
        }
    }

    void setWillReplaceChildWindows() {
        ProtoLog.d(WM_DEBUG_ADD_REMOVE, "Marking app token %s"
                + " with replacing child windows.", this);
        for (int i = mChildren.size() - 1; i >= 0; i--) {
            final WindowState w = mChildren.get(i);
            w.setWillReplaceChildWindows();
        }
    }

    void clearWillReplaceWindows() {
        ProtoLog.d(WM_DEBUG_ADD_REMOVE,
                "Resetting app token %s of replacing window marks.", this);

        for (int i = mChildren.size() - 1; i >= 0; i--) {
            final WindowState w = mChildren.get(i);
            w.clearWillReplaceWindow();
        }
    }

    void requestUpdateWallpaperIfNeeded() {
        for (int i = mChildren.size() - 1; i >= 0; i--) {
            final WindowState w = mChildren.get(i);
            w.requestUpdateWallpaperIfNeeded();
        }
    }

    /**
     * @return The to top most child window for which {@link LayoutParams#isFullscreen()} returns
     *         true and isn't fully transparent.
     */
    WindowState getTopFullscreenOpaqueWindow() {
        for (int i = mChildren.size() - 1; i >= 0; i--) {
            final WindowState win = mChildren.get(i);
            if (win != null && win.mAttrs.isFullscreen() && !win.isFullyTransparent()) {
                return win;
            }
        }
        return null;
    }

    WindowState findMainWindow() {
        return findMainWindow(true);
    }

    /**
     * Finds the main window that either has type base application or application starting if
     * requested.
     *
     * @param includeStartingApp Allow to search application-starting windows to also be returned.
     * @return The main window of type base application or application starting if requested.
     */
    WindowState findMainWindow(boolean includeStartingApp) {
        WindowState candidate = null;
        for (int j = mChildren.size() - 1; j >= 0; --j) {
            final WindowState win = mChildren.get(j);
            final int type = win.mAttrs.type;
            // No need to loop through child window as base application and starting types can't be
            // child windows.
            if (type == TYPE_BASE_APPLICATION
                    || (includeStartingApp && type == TYPE_APPLICATION_STARTING)) {
                // In cases where there are multiple windows, we prefer the non-exiting window. This
                // happens for example when replacing windows during an activity relaunch. When
                // constructing the animation, we want the new window, not the exiting one.
                if (win.mAnimatingExit) {
                    candidate = win;
                } else {
                    return win;
                }
            }
        }
        return candidate;
    }

    SurfaceControl getAppAnimationLayer() {
        return getAppAnimationLayer(isActivityTypeHome() ? ANIMATION_LAYER_HOME
                : needsZBoost() ? ANIMATION_LAYER_BOOSTED
                        : ANIMATION_LAYER_STANDARD);
    }

    @Override
    boolean needsZBoost() {
        return mNeedsZBoost || super.needsZBoost();
    }

    @Override
    public SurfaceControl getAnimationLeashParent() {
        // For transitions in the pinned stack (menu activity) we just let them occur as a child
        // of the pinned stack.
        // All normal app transitions take place in an animation layer which is below the pinned
        // stack but may be above the parent stacks of the given animating apps by default. When
        // a new hierarchical animation is enabled, we just let them occur as a child of the parent
        // stack, i.e. the hierarchy of the surfaces is unchanged.
        if (inPinnedWindowingMode()) {
            return getStack().getSurfaceControl();
        } else if (WindowManagerService.sHierarchicalAnimations) {
            return super.getAnimationLeashParent();
        } else {
            return getAppAnimationLayer();
        }
    }

    @VisibleForTesting
    boolean shouldAnimate() {
        return task == null || task.shouldAnimate();
    }

    /**
     * Creates a layer to apply crop to an animation.
     */
    private SurfaceControl createAnimationBoundsLayer(Transaction t) {
        ProtoLog.i(WM_DEBUG_APP_TRANSITIONS_ANIM, "Creating animation bounds layer");
        final SurfaceControl.Builder builder = makeAnimationLeash()
                .setParent(getAnimationLeashParent())
                .setName(getSurfaceControl() + " - animation-bounds");
        final SurfaceControl boundsLayer = builder.build();
        t.show(boundsLayer);
        return boundsLayer;
    }

    @Override
    public boolean shouldDeferAnimationFinish(Runnable endDeferFinishCallback) {
        return mAnimatingActivityRegistry != null
                && mAnimatingActivityRegistry.notifyAboutToFinish(
                this, endDeferFinishCallback);
    }

    @Override
    boolean isWaitingForTransitionStart() {
        final DisplayContent dc = getDisplayContent();
        return dc != null && dc.mAppTransition.isTransitionSet()
                && (dc.mOpeningApps.contains(this)
                || dc.mClosingApps.contains(this)
                || dc.mChangingContainers.contains(this));
    }

    private int getAnimationLayer() {
        // The leash is parented to the animation layer. We need to preserve the z-order by using
        // the prefix order index, but we boost if necessary.
        int layer;
        if (!inPinnedWindowingMode()) {
            layer = getPrefixOrderIndex();
        } else {
            // Pinned stacks have animations take place within themselves rather than an animation
            // layer so we need to preserve the order relative to the stack (e.g. the order of our
            // task/parent).
            layer = getParent().getPrefixOrderIndex();
        }

        if (mNeedsZBoost) {
            layer += Z_BOOST_BASE;
        }
        return layer;
    }

    @Override
    public void onAnimationLeashCreated(Transaction t, SurfaceControl leash) {
        t.setLayer(leash, getAnimationLayer());
        getDisplayContent().assignStackOrdering();
    }

    @Override
    public void onLeashAnimationStarting(Transaction t, SurfaceControl leash) {
        if (mAnimatingActivityRegistry != null) {
            mAnimatingActivityRegistry.notifyStarting(this);
        }

        // If the animation needs to be cropped then an animation bounds layer is created as a child
        // of the pinned stack or animation layer. The leash is then reparented to this new layer.
        if (mNeedsAnimationBoundsLayer) {
            mTmpRect.setEmpty();
            if (getDisplayContent().mAppTransitionController.isTransitWithinTask(
                    getTransit(), task)) {
                task.getBounds(mTmpRect);
            } else {
                final ActivityStack stack = getStack();
                if (stack == null) {
                    return;
                }
                // Set clip rect to stack bounds.
                stack.getBounds(mTmpRect);
            }
            mAnimationBoundsLayer = createAnimationBoundsLayer(t);

            // Crop to stack bounds.
            if (!WindowManagerService.sHierarchicalAnimations) {
                // For Hierarchical animation, we don't need to set window crop since the leash
                // surface size has already same as the animating container.
                t.setWindowCrop(mAnimationBoundsLayer, mTmpRect);
            }
            t.setLayer(leash, 0);
            t.setLayer(mAnimationBoundsLayer, getAnimationLayer());

            // Reparent leash to animation bounds layer.
            t.reparent(leash, mAnimationBoundsLayer);
        }
    }

    @Override
    void prepareSurfaces() {
        final boolean show = isVisible() || isAnimatingExcluding(PARENTS,
                ANIMATION_TYPE_SCREEN_ROTATION);

        if (mSurfaceControl != null) {
            if (show && !mLastSurfaceShowing) {
                getPendingTransaction().show(mSurfaceControl);
            } else if (!show && mLastSurfaceShowing) {
                getPendingTransaction().hide(mSurfaceControl);
            }
        }
        if (mThumbnail != null) {
            mThumbnail.setShowing(getPendingTransaction(), show);
        }
        mLastSurfaceShowing = show;
        super.prepareSurfaces();
    }

    /**
     * @return Whether our {@link #getSurfaceControl} is currently showing.
     */
    boolean isSurfaceShowing() {
        return mLastSurfaceShowing;
    }

    void attachThumbnailAnimation() {
        if (!isAnimating(PARENTS)) {
            return;
        }
        final GraphicBuffer thumbnailHeader =
                getDisplayContent().mAppTransition.getAppTransitionThumbnailHeader(task);
        if (thumbnailHeader == null) {
            ProtoLog.d(WM_DEBUG_APP_TRANSITIONS, "No thumbnail header bitmap for: %s", task);
            return;
        }
        clearThumbnail();
        final Transaction transaction = getAnimatingContainer().getPendingTransaction();
        mThumbnail = new WindowContainerThumbnail(mWmService.mSurfaceFactory,
                transaction, getAnimatingContainer(), thumbnailHeader);
        mThumbnail.startAnimation(transaction, loadThumbnailAnimation(thumbnailHeader));
    }

    /**
     * Attaches a surface with a thumbnail for the
     * {@link android.app.ActivityOptions#ANIM_OPEN_CROSS_PROFILE_APPS} animation.
     */
    void attachCrossProfileAppsThumbnailAnimation() {
        if (!isAnimating(PARENTS)) {
            return;
        }
        clearThumbnail();

        final WindowState win = findMainWindow();
        if (win == null) {
            return;
        }
        final Rect frame = win.getRelativeFrameLw();
        final int thumbnailDrawableRes = task.mUserId == mWmService.mCurrentUserId
                ? R.drawable.ic_account_circle
                : R.drawable.ic_corp_badge;
        final GraphicBuffer thumbnail =
                getDisplayContent().mAppTransition
                        .createCrossProfileAppsThumbnail(thumbnailDrawableRes, frame);
        if (thumbnail == null) {
            return;
        }
        final Transaction transaction = getPendingTransaction();
        mThumbnail = new WindowContainerThumbnail(mWmService.mSurfaceFactory,
                transaction, getTask(), thumbnail);
        final Animation animation =
                getDisplayContent().mAppTransition.createCrossProfileAppsThumbnailAnimationLocked(
                        frame);
        mThumbnail.startAnimation(transaction, animation, new Point(frame.left, frame.top));
    }

    private Animation loadThumbnailAnimation(GraphicBuffer thumbnailHeader) {
        final DisplayInfo displayInfo = mDisplayContent.getDisplayInfo();

        // If this is a multi-window scenario, we use the windows frame as
        // destination of the thumbnail header animation. If this is a full screen
        // window scenario, we use the whole display as the target.
        WindowState win = findMainWindow();
        Rect appRect = win != null ? win.getContentFrameLw() :
                new Rect(0, 0, displayInfo.appWidth, displayInfo.appHeight);
        final Rect insets = win != null ? win.getContentInsets() : null;
        final Configuration displayConfig = mDisplayContent.getConfiguration();
        return getDisplayContent().mAppTransition.createThumbnailAspectScaleAnimationLocked(
                appRect, insets, thumbnailHeader, task, displayConfig.uiMode,
                displayConfig.orientation);
    }

    @Override
    public void onAnimationLeashLost(Transaction t) {
        super.onAnimationLeashLost(t);
        if (mAnimationBoundsLayer != null) {
            t.remove(mAnimationBoundsLayer);
            mAnimationBoundsLayer = null;
        }

        if (mAnimatingActivityRegistry != null) {
            mAnimatingActivityRegistry.notifyFinished(this);
        }
    }

    @Override
    protected void onAnimationFinished(@AnimationType int type, AnimationAdapter anim) {
        super.onAnimationFinished(type, anim);

        Trace.traceBegin(TRACE_TAG_WINDOW_MANAGER, "AR#onAnimationFinished");
        mTransit = TRANSIT_UNSET;
        mTransitFlags = 0;
        mNeedsZBoost = false;
        mNeedsAnimationBoundsLayer = false;

        setAppLayoutChanges(FINISH_LAYOUT_REDO_ANIM | FINISH_LAYOUT_REDO_WALLPAPER,
                "ActivityRecord");

        clearThumbnail();
        setClientVisible(isVisible() || mVisibleRequested);

        getDisplayContent().computeImeTargetIfNeeded(this);

        if (DEBUG_ANIM) Slog.v(TAG, "Animation done in " + this
                + ": reportedVisible=" + reportedVisible
                + " okToDisplay=" + okToDisplay()
                + " okToAnimate=" + okToAnimate()
                + " startingDisplayed=" + startingDisplayed);

        // clean up thumbnail window
        if (mThumbnail != null) {
            mThumbnail.destroy();
            mThumbnail = null;
        }

        // WindowState.onExitAnimationDone might modify the children list, so make a copy and then
        // traverse the copy.
        final ArrayList<WindowState> children = new ArrayList<>(mChildren);
        children.forEach(WindowState::onExitAnimationDone);

        getDisplayContent().mAppTransition.notifyAppTransitionFinishedLocked(token);
        scheduleAnimation();

        if (!mStackSupervisor.mStoppingActivities.isEmpty()
                || !mStackSupervisor.mFinishingActivities.isEmpty()) {
            if (mRootWindowContainer.allResumedActivitiesIdle()) {
                // If all activities are already idle then we now need to make sure we perform
                // the full stop of this activity. This is because we won't do that while they
                // are still waiting for the animation to finish.
                mStackSupervisor.scheduleIdle();
            } else if (mRootWindowContainer.allResumedActivitiesVisible()) {
                // If all resumed activities are already visible (and should be drawn, see
                // updateReportedVisibility ~ nowVisible) but not idle, we still schedule to
                // process the stopping and finishing activities because the transition is done.
                // This also avoids if the next activity never reports idle (e.g. animating view),
                // the previous will need to wait until idle timeout to be stopped or destroyed.
                mStackSupervisor.scheduleProcessStoppingAndFinishingActivities();
            }
        }
        Trace.traceEnd(TRACE_TAG_WINDOW_MANAGER);
    }

    void clearAnimatingFlags() {
        boolean wallpaperMightChange = false;
        for (int i = mChildren.size() - 1; i >= 0; i--) {
            final WindowState win = mChildren.get(i);
            wallpaperMightChange |= win.clearAnimatingFlags();
        }
        if (wallpaperMightChange) {
            requestUpdateWallpaperIfNeeded();
        }
    }

    @Override
    void cancelAnimation() {
        super.cancelAnimation();
        clearThumbnail();
    }

    @VisibleForTesting
    WindowContainerThumbnail getThumbnail() {
        return mThumbnail;
    }

    private void clearThumbnail() {
        if (mThumbnail == null) {
            return;
        }
        mThumbnail.destroy();
        mThumbnail = null;
    }

    public int getTransit() {
        return mTransit;
    }

    int getTransitFlags() {
        return mTransitFlags;
    }

    void registerRemoteAnimations(RemoteAnimationDefinition definition) {
        mRemoteAnimationDefinition = definition;
        if (definition != null) {
            definition.linkToDeath(this::unregisterRemoteAnimations);
        }
    }

    void unregisterRemoteAnimations() {
        mRemoteAnimationDefinition = null;
    }

    @Override
    RemoteAnimationDefinition getRemoteAnimationDefinition() {
        return mRemoteAnimationDefinition;
    }

    @Override
    void applyFixedRotationTransform(DisplayInfo info, DisplayFrames displayFrames,
            Configuration config) {
        super.applyFixedRotationTransform(info, displayFrames, config);
        ensureActivityConfiguration(0 /* globalChanges */, false /* preserveWindow */);
    }

    @Override
    void onCancelFixedRotationTransform(int originalDisplayRotation) {
        if (this != mDisplayContent.getLastOrientationSource()
                || getRequestedConfigurationOrientation() != ORIENTATION_UNDEFINED) {
            // Only need to handle the activity that should be rotated with display.
            return;
        }

        // Perform rotation animation according to the rotation of this activity.
        startFreezingScreen(originalDisplayRotation);
        // This activity may relaunch or perform configuration change so once it has reported drawn,
        // the screen can be unfrozen.
        ensureActivityConfiguration(0 /* globalChanges */, !PRESERVE_WINDOWS);
    }

    void setRequestedOrientation(int requestedOrientation) {
        setOrientation(requestedOrientation, mayFreezeScreenLocked());
        mAtmService.getTaskChangeNotificationController().notifyActivityRequestedOrientationChanged(
                task.mTaskId, requestedOrientation);
    }

    private void setOrientation(int requestedOrientation, boolean freezeScreenIfNeeded) {
        final IBinder binder =
                (freezeScreenIfNeeded && appToken != null) ? appToken.asBinder() : null;
        setOrientation(requestedOrientation, binder, this);

        // Push the new configuration to the requested app in case where it's not pushed, e.g. when
        // the request is handled at task level with letterbox.
        if (!getMergedOverrideConfiguration().equals(
                mLastReportedConfiguration.getMergedConfiguration())) {
            ensureActivityConfiguration(0 /* globalChanges */, false /* preserveWindow */);
        }
    }

    void reportDescendantOrientationChangeIfNeeded() {
        // Orientation request is exposed only when we're visible. Therefore visibility change
        // will change requested orientation. Notify upward the hierarchy ladder to adjust
        // configuration. This is important to cases where activities with incompatible
        // orientations launch, or user goes back from an activity of bi-orientation to an
        // activity with specified orientation.
        if (getRequestedOrientation() == SCREEN_ORIENTATION_UNSET) {
            return;
        }

        final IBinder freezeToken = mayFreezeScreenLocked() ? appToken : null;
        onDescendantOrientationChanged(freezeToken, this);
    }

    /**
     * We override because this class doesn't want its children affecting its reported orientation
     * in anyway.
     */
    @Override
    int getOrientation(int candidate) {
        if (candidate == SCREEN_ORIENTATION_BEHIND) {
            // Allow app to specify orientation regardless of its visibility state if the current
            // candidate want us to use orientation behind. I.e. the visible app on-top of this one
            // wants us to use the orientation of the app behind it.
            return mOrientation;
        }

        // The {@link ActivityRecord} should only specify an orientation when it is not closing.
        // Allowing closing {@link ActivityRecord} to participate can lead to an Activity in another
        // task being started in the wrong orientation during the transition.
        if (!getDisplayContent().mClosingApps.contains(this)
                && (isVisible() || getDisplayContent().mOpeningApps.contains(this))) {
            return mOrientation;
        }

        return SCREEN_ORIENTATION_UNSET;
    }

    /** Returns the app's preferred orientation regardless of its currently visibility state. */
    int getRequestedOrientation() {
        return mOrientation;
    }

    /**
     * Set the last reported global configuration to the client. Should be called whenever a new
     * global configuration is sent to the client for this activity.
     */
    void setLastReportedGlobalConfiguration(@NonNull Configuration config) {
        mLastReportedConfiguration.setGlobalConfiguration(config);
    }

    /**
     * Set the last reported configuration to the client. Should be called whenever
     * a new merged configuration is sent to the client for this activity.
     */
    void setLastReportedConfiguration(@NonNull MergedConfiguration config) {
        setLastReportedConfiguration(config.getGlobalConfiguration(),
            config.getOverrideConfiguration());
    }

    private void setLastReportedConfiguration(Configuration global, Configuration override) {
        mLastReportedConfiguration.setConfiguration(global, override);
    }

    /**
     * @return {@code true} if this activity is in size compatibility mode that uses the different
     *         density than its parent or its bounds don't fit in parent naturally.
     */
    boolean inSizeCompatMode() {
        if (mCompatDisplayInsets == null || !shouldUseSizeCompatMode()
                // The orientation is different from parent when transforming.
                || isFixedRotationTransforming()) {
            return false;
        }
        final Rect appBounds = getConfiguration().windowConfiguration.getAppBounds();
        if (appBounds == null) {
            // The app bounds hasn't been computed yet.
            return false;
        }

        final Configuration parentConfig = getParent().getConfiguration();
        // Although colorMode, screenLayout, smallestScreenWidthDp are also fixed, generally these
        // fields should be changed with density and bounds, so here only compares the most
        // significant field.
        if (parentConfig.densityDpi != getConfiguration().densityDpi) {
            return true;
        }

        final Rect parentAppBounds = parentConfig.windowConfiguration.getAppBounds();
        final int appWidth = appBounds.width();
        final int appHeight = appBounds.height();
        final int parentAppWidth = parentAppBounds.width();
        final int parentAppHeight = parentAppBounds.height();
        if (parentAppWidth == appWidth && parentAppHeight == appHeight) {
            // Matched the parent bounds.
            return false;
        }
        if (parentAppWidth > appWidth && parentAppHeight > appHeight) {
            // Both sides are smaller than the parent.
            return true;
        }
        if (parentAppWidth < appWidth || parentAppHeight < appHeight) {
            // One side is larger than the parent.
            return true;
        }

        // The rest of the condition is that only one side is smaller than the parent, but it still
        // needs to exclude the cases where the size is limited by the fixed aspect ratio.
        if (info.maxAspectRatio > 0) {
            final float aspectRatio = (0.5f + Math.max(appWidth, appHeight))
                    / Math.min(appWidth, appHeight);
            if (aspectRatio >= info.maxAspectRatio) {
                // The current size has reached the max aspect ratio.
                return false;
            }
        }
        if (info.minAspectRatio > 0) {
            // The activity should have at least the min aspect ratio, so this checks if the parent
            // still has available space to provide larger aspect ratio.
            final float parentAspectRatio = (0.5f + Math.max(parentAppWidth, parentAppHeight))
                    / Math.min(parentAppWidth, parentAppHeight);
            if (parentAspectRatio <= info.minAspectRatio) {
                // The long side has reached the parent.
                return false;
            }
        }
        return true;
    }

    /**
     * Indicates the activity will keep the bounds and screen configuration when it was first
     * launched, no matter how its parent changes.
     *
     * @return {@code true} if this activity is declared as non-resizable and fixed orientation or
     *         aspect ratio.
     */
    boolean shouldUseSizeCompatMode() {
        if (inMultiWindowMode() || getWindowConfiguration().hasWindowDecorCaption()) {
            final ActivityRecord root = task != null ? task.getRootActivity() : null;
            if (root != null && root != this && !root.shouldUseSizeCompatMode()) {
                // If the root activity doesn't use size compatibility mode, the activities above
                // are forced to be the same for consistent visual appearance.
                return false;
            }
        }
        return !isResizeable() && (info.isFixedOrientation() || info.hasFixedAspectRatio())
                // The configuration of non-standard type should be enforced by system.
                && isActivityTypeStandard()
                && !mAtmService.mForceResizableActivities;
    }

    boolean hasSizeCompatBounds() {
        return mSizeCompatBounds != null;
    }

    // TODO(b/36505427): Consider moving this method and similar ones to ConfigurationContainer.
    private void updateSizeCompatMode() {
        if (mCompatDisplayInsets != null || !shouldUseSizeCompatMode()) {
            // The override configuration is set only once in size compatibility mode.
            return;
        }
        final Configuration parentConfig = getParent().getConfiguration();
        if (!hasProcess() && !isConfigurationCompatible(parentConfig)) {
            // Don't compute when launching in fullscreen and the fixed orientation is not the
            // current orientation. It is more accurately to compute the override bounds from
            // the updated configuration after the fixed orientation is applied.
            return;
        }

        Configuration overrideConfig = getRequestedOverrideConfiguration();
        final Configuration fullConfig = getConfiguration();

        // Ensure the screen related fields are set. It is used to prevent activity relaunch
        // when moving between displays. For screenWidthDp and screenWidthDp, because they
        // are relative to bounds and density, they will be calculated in
        // {@link Task#computeConfigResourceOverrides} and the result will also be
        // relatively fixed.
        overrideConfig.colorMode = fullConfig.colorMode;
        overrideConfig.densityDpi = fullConfig.densityDpi;
        // The smallest screen width is the short side of screen bounds. Because the bounds
        // and density won't be changed, smallestScreenWidthDp is also fixed.
        overrideConfig.smallestScreenWidthDp = fullConfig.smallestScreenWidthDp;
        if (info.isFixedOrientation()) {
            // lock rotation too. When in size-compat, onConfigurationChanged will watch for and
            // apply runtime rotation changes.
            overrideConfig.windowConfiguration.setRotation(
                    fullConfig.windowConfiguration.getRotation());
        }

        // The role of CompatDisplayInsets is like the override bounds.
        mCompatDisplayInsets = new CompatDisplayInsets(mDisplayContent, this);
    }

    @VisibleForTesting
    void clearSizeCompatMode() {
        mSizeCompatScale = 1f;
        mSizeCompatBounds = null;
        mCompatDisplayInsets = null;
        onRequestedOverrideConfigurationChanged(EMPTY);
    }

    @Override
    public boolean matchParentBounds() {
        if (super.matchParentBounds() && mCompatDisplayInsets == null) {
            return true;
        }
        // An activity in size compatibility mode may have resolved override bounds, so the exact
        // bounds should also be checked. Otherwise IME window will show with offset. See
        // {@link DisplayContent#isImeAttachedToApp}.
        final WindowContainer parent = getParent();
        return parent == null || parent.getBounds().equals(getResolvedOverrideBounds());
    }

    @Override
    float getSizeCompatScale() {
        return hasSizeCompatBounds() ? mSizeCompatScale : super.getSizeCompatScale();
    }

    @Override
    void resolveOverrideConfiguration(Configuration newParentConfiguration) {
        super.resolveOverrideConfiguration(newParentConfiguration);
        final Configuration resolvedConfig = getResolvedOverrideConfiguration();
        if (isFixedRotationTransforming()) {
            // The resolved configuration is applied with rotated display configuration. If this
            // activity matches its parent (the following resolving procedures are no-op), then it
            // can use the resolved configuration directly. Otherwise (e.g. fixed aspect ratio),
            // the rotated configuration is used as parent configuration to compute the actual
            // resolved configuration. It is like putting the activity in a rotated container.
            mTmpConfig.setTo(newParentConfiguration);
            mTmpConfig.updateFrom(resolvedConfig);
            newParentConfiguration = mTmpConfig;
        }
        if (mCompatDisplayInsets != null) {
            resolveSizeCompatModeConfiguration(newParentConfiguration);
        } else {
            if (inMultiWindowMode()) {
                // We ignore activities' requested orientation in multi-window modes. Task level may
                // take them into consideration when calculating bounds.
                resolvedConfig.orientation = Configuration.ORIENTATION_UNDEFINED;
                // If the activity has requested override bounds, the configuration needs to be
                // computed accordingly.
                if (!matchParentBounds()) {
                    task.computeConfigResourceOverrides(resolvedConfig, newParentConfiguration);
                }
            } else {
                resolveFullscreenConfiguration(newParentConfiguration);
            }
        }

        // Assign configuration sequence number into hierarchy because there is a different way than
        // ensureActivityConfiguration() in this class that uses configuration in WindowState during
        // layout traversals.
        mConfigurationSeq = Math.max(++mConfigurationSeq, 1);
        getResolvedOverrideConfiguration().seq = mConfigurationSeq;
    }

    /**
     * Resolves the configuration of activity in fullscreen mode. If the bounds are restricted by
     * aspect ratio, the position will be centered horizontally in parent's app bounds to balance
     * the visual appearance. The policy of aspect ratio has higher priority than the requested
     * override bounds.
     */
    private void resolveFullscreenConfiguration(Configuration newParentConfiguration) {
        final Configuration resolvedConfig = getResolvedOverrideConfiguration();
        final Rect parentAppBounds = newParentConfiguration.windowConfiguration.getAppBounds();
        final Rect parentBounds = newParentConfiguration.windowConfiguration.getBounds();
        final Rect resolvedBounds = resolvedConfig.windowConfiguration.getBounds();
        // Use tmp bounds to calculate aspect ratio so we can know whether the activity should use
        // restricted size (resolved bounds may be the requested override bounds).
        mTmpBounds.setEmpty();
        applyAspectRatio(mTmpBounds, parentAppBounds, parentBounds);
        // If the out bounds is not empty, it means the activity cannot fill parent's app bounds,
        // then there is space to be centered.
        final boolean needToBeCentered = !mTmpBounds.isEmpty();
        if (needToBeCentered) {
            resolvedBounds.set(mTmpBounds);
            // Exclude the horizontal decor area.
            resolvedBounds.left = parentAppBounds.left;
        }
        if (!resolvedBounds.isEmpty() && !resolvedBounds.equals(parentBounds)) {
            // Compute the configuration based on the resolved bounds. If aspect ratio doesn't
            // restrict, the bounds should be the requested override bounds.
            task.computeConfigResourceOverrides(resolvedConfig, newParentConfiguration,
                    getFixedRotationTransformDisplayInfo());
        }
        if (needToBeCentered) {
            // Offset to center relative to parent's app bounds.
            final int offsetX = getHorizontalCenterOffset(
                    parentAppBounds.width(), resolvedBounds.width());
            offsetBounds(resolvedConfig, offsetX, 0 /* offsetY */);
        }
    }

    /**
     * Resolves consistent screen configuration for orientation and rotation changes without
     * inheriting the parent bounds.
     */
    private void resolveSizeCompatModeConfiguration(Configuration newParentConfiguration) {
        final Configuration resolvedConfig = getResolvedOverrideConfiguration();
        final Rect resolvedBounds = resolvedConfig.windowConfiguration.getBounds();
        final int requestedOrientation = getRequestedConfigurationOrientation();
        final boolean orientationRequested = requestedOrientation != ORIENTATION_UNDEFINED;
        final int orientation = orientationRequested
                ? requestedOrientation
                : newParentConfiguration.orientation;
        int rotation = newParentConfiguration.windowConfiguration.getRotation();
        final boolean canChangeOrientation = handlesOrientationChangeFromDescendant();
        if (canChangeOrientation && mCompatDisplayInsets.mIsRotatable
                && !mCompatDisplayInsets.mIsFloating) {
            // Use parent rotation because the original display can rotate by requested orientation.
            resolvedConfig.windowConfiguration.setRotation(rotation);
        } else {
            final int overrideRotation = resolvedConfig.windowConfiguration.getRotation();
            if (overrideRotation != ROTATION_UNDEFINED) {
                rotation = overrideRotation;
            }
        }

        // Use compat insets to lock width and height. We should not use the parent width and height
        // because apps in compat mode should have a constant width and height. The compat insets
        // are locked when the app is first launched and are never changed after that, so we can
        // rely on them to contain the original and unchanging width and height of the app.
        final Rect containingAppBounds = new Rect();
        final Rect containingBounds = mTmpBounds;
        mCompatDisplayInsets.getContainerBounds(containingAppBounds, containingBounds, rotation,
                orientation, orientationRequested, canChangeOrientation);
        resolvedBounds.set(containingBounds);
        // The size of floating task is fixed (only swap), so the aspect ratio is already correct.
        if (!mCompatDisplayInsets.mIsFloating) {
            applyAspectRatio(resolvedBounds, containingAppBounds, containingBounds);
        }
        // If the bounds are restricted by fixed aspect ratio, the resolved bounds should be put in
        // the container app bounds. Otherwise the entire container bounds are available.
        final boolean fillContainer = resolvedBounds.equals(containingBounds);
        if (!fillContainer) {
            // The horizontal position should not cover insets.
            resolvedBounds.left = containingAppBounds.left;
        }

        // Use resolvedBounds to compute other override configurations such as appBounds. The bounds
        // are calculated in compat container space. The actual position on screen will be applied
        // later, so the calculation is simpler that doesn't need to involve offset from parent.
        task.computeConfigResourceOverrides(resolvedConfig, newParentConfiguration,
                mCompatDisplayInsets);
        // Use current screen layout as source because the size of app is independent to parent.
        resolvedConfig.screenLayout = Task.computeScreenLayoutOverride(
                getConfiguration().screenLayout, resolvedConfig.screenWidthDp,
                resolvedConfig.screenHeightDp);

        // Use parent orientation if it cannot be decided by bounds, so the activity can fit inside
        // the parent bounds appropriately.
        if (resolvedConfig.screenWidthDp == resolvedConfig.screenHeightDp) {
            resolvedConfig.orientation = newParentConfiguration.orientation;
        }

        // Below figure is an example that puts an activity which was launched in a larger container
        // into a smaller container.
        //   The outermost rectangle is the real display bounds.
        //   "@" is the parent app bounds.
        //   "#" is the {@code resolvedBounds} that applies to application.
        //   "*" is the {@code mSizeCompatBounds} that used to show on screen if scaled.
        // ------------------------------
        // |                            |
        // |    @@@@*********@@@@###    |
        // |    @   *       *   @  #    |
        // |    @   *       *   @  #    |
        // |    @   *       *   @  #    |
        // |    @@@@*********@@@@  #    |
        // ---------#--------------#-----
        //          #              #
        //          ################
        // The application is still layouted in "#" since it was launched, and it will be visually
        // scaled and positioned to "*".

        // Calculates the scale and offset to horizontal center the size compatibility bounds into
        // the region which is available to application.
        final Rect parentBounds = newParentConfiguration.windowConfiguration.getBounds();
        final Rect parentAppBounds = newParentConfiguration.windowConfiguration.getAppBounds();
        final Rect resolvedAppBounds = resolvedConfig.windowConfiguration.getAppBounds();
        final int contentW = resolvedAppBounds.width();
        final int contentH = resolvedAppBounds.height();
        final int viewportW = parentAppBounds.width();
        final int viewportH = parentAppBounds.height();
        // Only allow to scale down.
        mSizeCompatScale = (contentW <= viewportW && contentH <= viewportH)
                ? 1f : Math.min((float) viewportW / contentW, (float) viewportH / contentH);
        final int screenTopInset = parentAppBounds.top - parentBounds.top;
        final boolean topNotAligned = screenTopInset != resolvedAppBounds.top - resolvedBounds.top;
        if (mSizeCompatScale != 1f || topNotAligned) {
            if (mSizeCompatBounds == null) {
                mSizeCompatBounds = new Rect();
            }
            mSizeCompatBounds.set(resolvedAppBounds);
            mSizeCompatBounds.offsetTo(0, 0);
            mSizeCompatBounds.scale(mSizeCompatScale);
            // The insets are included in height, e.g. the area of real cutout shouldn't be scaled.
            mSizeCompatBounds.bottom += screenTopInset;
        } else {
            mSizeCompatBounds = null;
        }

        // Center horizontally in parent (app bounds) and align to top of parent (bounds)
        // - this is a UX choice.
        final int offsetX = getHorizontalCenterOffset(
                (int) viewportW, (int) (contentW * mSizeCompatScale));
        // Above coordinates are in "@" space, now place "*" and "#" to screen space.
        final int screenPosX = (fillContainer ? parentBounds.left : parentAppBounds.left) + offsetX;
        final int screenPosY = parentBounds.top;
        if (screenPosX != 0 || screenPosY != 0) {
            if (mSizeCompatBounds != null) {
                mSizeCompatBounds.offset(screenPosX, screenPosY);
            }
            // Add the global coordinates and remove the local coordinates.
            final int dx = screenPosX - resolvedBounds.left;
            final int dy = screenPosY - resolvedBounds.top;
            offsetBounds(resolvedConfig, dx, dy);
        }
    }

    /** @return The horizontal offset of putting the content in the center of viewport. */
    private static int getHorizontalCenterOffset(int viewportW, int contentW) {
        return (int) ((viewportW - contentW + 1) * 0.5f);
    }

    private static void offsetBounds(Configuration inOutConfig, int offsetX, int offsetY) {
        inOutConfig.windowConfiguration.getBounds().offset(offsetX, offsetY);
        inOutConfig.windowConfiguration.getAppBounds().offset(offsetX, offsetY);
    }

    @Override
    public Rect getBounds() {
        if (mSizeCompatBounds != null) {
            return mSizeCompatBounds;
        }
        return super.getBounds();
    }

    @VisibleForTesting
    @Override
    Rect getAnimationBounds(int appStackClipMode) {
        if (appStackClipMode == STACK_CLIP_BEFORE_ANIM && getStack() != null) {
            // Using the stack bounds here effectively applies the clipping before animation.
            return getStack().getBounds();
        }
        // Use task-bounds if available so that activity-level letterbox (maxAspectRatio) is
        // included in the animation.
        return task != null ? task.getBounds() : getBounds();
    }

    @Override
    public void onConfigurationChanged(Configuration newParentConfig) {
        if (mCompatDisplayInsets != null) {
            Configuration overrideConfig = getRequestedOverrideConfiguration();
            // Adapt to changes in orientation locking. The app is still non-resizable, but
            // it can change which orientation is fixed. If the fixed orientation changes,
            // update the rotation used on the "compat" display
            boolean wasFixedOrient =
                    overrideConfig.windowConfiguration.getRotation() != ROTATION_UNDEFINED;
            int requestedOrient = getRequestedConfigurationOrientation();
            if (requestedOrient != ORIENTATION_UNDEFINED
                    && requestedOrient != getConfiguration().orientation
                    // The task orientation depends on the top activity orientation, so it
                    // should match. If it doesn't, just wait until it does.
                    && requestedOrient == getParent().getConfiguration().orientation
                    && (overrideConfig.windowConfiguration.getRotation()
                            != getParent().getWindowConfiguration().getRotation())) {
                overrideConfig.windowConfiguration.setRotation(
                        getParent().getWindowConfiguration().getRotation());
                onRequestedOverrideConfigurationChanged(overrideConfig);
                return;
            } else if (wasFixedOrient && requestedOrient == ORIENTATION_UNDEFINED
                    && (overrideConfig.windowConfiguration.getRotation()
                            != ROTATION_UNDEFINED)) {
                overrideConfig.windowConfiguration.setRotation(ROTATION_UNDEFINED);
                onRequestedOverrideConfigurationChanged(overrideConfig);
                return;
            }
        }
        super.onConfigurationChanged(newParentConfig);

        // Configuration's equality doesn't consider seq so if only seq number changes in resolved
        // override configuration. Therefore ConfigurationContainer doesn't change merged override
        // configuration, but it's used to push configuration changes so explicitly update that.
        if (getMergedOverrideConfiguration().seq != getResolvedOverrideConfiguration().seq) {
            onMergedOverrideConfigurationChanged();
        }

        final DisplayContent display = getDisplay();
        if (display == null) {
            return;
        }
        if (mVisibleRequested) {
            // It may toggle the UI for user to restart the size compatibility mode activity.
            display.handleActivitySizeCompatModeIfNeeded(this);
        } else if (mCompatDisplayInsets != null) {
            // The override changes can only be obtained from display, because we don't have the
            // difference of full configuration in each hierarchy.
            final int displayChanges = display.getCurrentOverrideConfigurationChanges();
            final int orientationChanges = CONFIG_WINDOW_CONFIGURATION
                    | CONFIG_SCREEN_SIZE | CONFIG_ORIENTATION;
            final boolean hasNonOrienSizeChanged = hasResizeChange(displayChanges)
                    // Filter out the case of simple orientation change.
                    && (displayChanges & orientationChanges) != orientationChanges;
            // For background activity that uses size compatibility mode, if the size or density of
            // the display is changed, then reset the override configuration and kill the activity's
            // process if its process state is not important to user.
            if (hasNonOrienSizeChanged || (displayChanges & ActivityInfo.CONFIG_DENSITY) != 0) {
                restartProcessIfVisible();
            }
        }
    }

    /** Returns true if the configuration is compatible with this activity. */
    boolean isConfigurationCompatible(Configuration config) {
        final int orientation = getRequestedOrientation();
        if (isFixedOrientationPortrait(orientation)
                && config.orientation != ORIENTATION_PORTRAIT) {
            return false;
        }
        if (isFixedOrientationLandscape(orientation)
                && config.orientation != ORIENTATION_LANDSCAPE) {
            return false;
        }
        return true;
    }

    /**
     * Applies aspect ratio restrictions to outBounds. If no restrictions, then no change is
     * made to outBounds.
     */
    // TODO(b/36505427): Consider moving this method and similar ones to ConfigurationContainer.
    private void applyAspectRatio(Rect outBounds, Rect containingAppBounds,
            Rect containingBounds) {
        final float maxAspectRatio = info.maxAspectRatio;
        final ActivityStack stack = getRootTask();
        final float minAspectRatio = info.minAspectRatio;

        if (task == null || stack == null || (inMultiWindowMode() && !shouldUseSizeCompatMode())
                || (maxAspectRatio == 0 && minAspectRatio == 0)
                || isInVrUiMode(getConfiguration())) {
            // We don't enforce aspect ratio if the activity task is in multiwindow unless it
            // is in size-compat mode. We also don't set it if we are in VR mode.
            return;
        }

        final int containingAppWidth = containingAppBounds.width();
        final int containingAppHeight = containingAppBounds.height();
        final float containingRatio = Math.max(containingAppWidth, containingAppHeight)
                / (float) Math.min(containingAppWidth, containingAppHeight);

        int activityWidth = containingAppWidth;
        int activityHeight = containingAppHeight;

        if (containingRatio > maxAspectRatio && maxAspectRatio != 0) {
            if (containingAppWidth < containingAppHeight) {
                // Width is the shorter side, so we use that to figure-out what the max. height
                // should be given the aspect ratio.
                activityHeight = (int) ((activityWidth * maxAspectRatio) + 0.5f);
            } else {
                // Height is the shorter side, so we use that to figure-out what the max. width
                // should be given the aspect ratio.
                activityWidth = (int) ((activityHeight * maxAspectRatio) + 0.5f);
            }
        } else if (containingRatio < minAspectRatio) {
            boolean adjustWidth;
            switch (getRequestedConfigurationOrientation()) {
                case ORIENTATION_LANDSCAPE:
                    // Width should be the longer side for this landscape app, so we use the width
                    // to figure-out what the max. height should be given the aspect ratio.
                    adjustWidth = false;
                    break;
                case ORIENTATION_PORTRAIT:
                    // Height should be the longer side for this portrait app, so we use the height
                    // to figure-out what the max. width should be given the aspect ratio.
                    adjustWidth = true;
                    break;
                default:
                    // This app doesn't have a preferred orientation, so we keep the length of the
                    // longer side, and use it to figure-out the length of the shorter side.
                    if (containingAppWidth < containingAppHeight) {
                        // Width is the shorter side, so we use the height to figure-out what the
                        // max. width should be given the aspect ratio.
                        adjustWidth = true;
                    } else {
                        // Height is the shorter side, so we use the width to figure-out what the
                        // max. height should be given the aspect ratio.
                        adjustWidth = false;
                    }
                    break;
            }
            if (adjustWidth) {
                activityWidth = (int) ((activityHeight / minAspectRatio) + 0.5f);
            } else {
                activityHeight = (int) ((activityWidth / minAspectRatio) + 0.5f);
            }
        }

        if (containingAppWidth <= activityWidth && containingAppHeight <= activityHeight) {
            // The display matches or is less than the activity aspect ratio, so nothing else to do.
            return;
        }

        // Compute configuration based on max supported width and height.
        // Also account for the left / top insets (e.g. from display cutouts), which will be clipped
        // away later in {@link Task#computeConfigResourceOverrides()}. Otherwise, the app
        // bounds would end up too small.
        outBounds.set(containingBounds.left, containingBounds.top,
                activityWidth + containingAppBounds.left,
                activityHeight + containingAppBounds.top);
    }

    /**
     * @return {@code true} if this activity was reparented to another display but
     *         {@link #ensureActivityConfiguration} is not called.
     */
    boolean shouldUpdateConfigForDisplayChanged() {
        return mLastReportedDisplayId != getDisplayId();
    }

    boolean ensureActivityConfiguration(int globalChanges, boolean preserveWindow) {
        return ensureActivityConfiguration(globalChanges, preserveWindow,
                false /* ignoreVisibility */);
    }

    /**
     * Make sure the given activity matches the current configuration. Ensures the HistoryRecord
     * is updated with the correct configuration and all other bookkeeping is handled.
     *
     * @param globalChanges The changes to the global configuration.
     * @param preserveWindow If the activity window should be preserved on screen if the activity
     *                       is relaunched.
     * @param ignoreVisibility If we should try to relaunch the activity even if it is invisible
     *                         (stopped state). This is useful for the case where we know the
     *                         activity will be visible soon and we want to ensure its configuration
     *                         before we make it visible.
     * @return False if the activity was relaunched and true if it wasn't relaunched because we
     *         can't or the app handles the specific configuration that is changing.
     */
    boolean ensureActivityConfiguration(int globalChanges, boolean preserveWindow,
            boolean ignoreVisibility) {
        final ActivityStack stack = getRootTask();
        if (stack.mConfigWillChange) {
            if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                    "Skipping config check (will change): " + this);
            return true;
        }

        // We don't worry about activities that are finishing.
        if (finishing) {
            if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                    "Configuration doesn't matter in finishing " + this);
            stopFreezingScreenLocked(false);
            return true;
        }

        if (!ignoreVisibility && (mState == STOPPING || mState == STOPPED || !shouldBeVisible())) {
            if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                    "Skipping config check invisible: " + this);
            return true;
        }

        if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                "Ensuring correct configuration: " + this);

        final int newDisplayId = getDisplayId();
        final boolean displayChanged = mLastReportedDisplayId != newDisplayId;
        if (displayChanged) {
            mLastReportedDisplayId = newDisplayId;
        }
        // TODO(b/36505427): Is there a better place to do this?
        updateSizeCompatMode();

        // Short circuit: if the two full configurations are equal (the common case), then there is
        // nothing to do.  We test the full configuration instead of the global and merged override
        // configurations because there are cases (like moving a task to the pinned stack) where
        // the combine configurations are equal, but would otherwise differ in the override config
        mTmpConfig.setTo(mLastReportedConfiguration.getMergedConfiguration());
        if (getConfiguration().equals(mTmpConfig) && !forceNewConfig && !displayChanged) {
            if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                    "Configuration & display unchanged in " + this);
            return true;
        }

        // Okay we now are going to make this activity have the new config.
        // But then we need to figure out how it needs to deal with that.

        // Find changes between last reported merged configuration and the current one. This is used
        // to decide whether to relaunch an activity or just report a configuration change.
        final int changes = getConfigurationChanges(mTmpConfig);

        // Update last reported values.
        final Configuration newMergedOverrideConfig = getMergedOverrideConfiguration();

        setLastReportedConfiguration(getProcessGlobalConfiguration(), newMergedOverrideConfig);

        if (mState == INITIALIZING) {
            // No need to relaunch or schedule new config for activity that hasn't been launched
            // yet. We do, however, return after applying the config to activity record, so that
            // it will use it for launch transaction.
            if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                    "Skipping config check for initializing activity: " + this);
            return true;
        }

        if (changes == 0 && !forceNewConfig) {
            if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                    "Configuration no differences in " + this);
            // There are no significant differences, so we won't relaunch but should still deliver
            // the new configuration to the client process.
            if (displayChanged) {
                scheduleActivityMovedToDisplay(newDisplayId, newMergedOverrideConfig);
            } else {
                scheduleConfigurationChanged(newMergedOverrideConfig);
            }
            return true;
        }

        if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                "Configuration changes for " + this + ", allChanges="
                        + Configuration.configurationDiffToString(changes));

        // If the activity isn't currently running, just leave the new configuration and it will
        // pick that up next time it starts.
        if (!attachedToProcess()) {
            if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                    "Configuration doesn't matter not running " + this);
            stopFreezingScreenLocked(false);
            forceNewConfig = false;
            return true;
        }

        // Figure out how to handle the changes between the configurations.
        if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                "Checking to restart " + info.name + ": changed=0x"
                        + Integer.toHexString(changes) + ", handles=0x"
                        + Integer.toHexString(info.getRealConfigChanged())
                        + ", mLastReportedConfiguration=" + mLastReportedConfiguration);

        if (shouldRelaunchLocked(changes, mTmpConfig) || forceNewConfig) {
            // Aha, the activity isn't handling the change, so DIE DIE DIE.
            configChangeFlags |= changes;
            startFreezingScreenLocked(globalChanges);
            forceNewConfig = false;
            preserveWindow &= isResizeOnlyChange(changes);
            final boolean hasResizeChange = hasResizeChange(changes & ~info.getRealConfigChanged());
            if (hasResizeChange) {
                final boolean isDragResizing = task.isDragResizing();
                mRelaunchReason = isDragResizing ? RELAUNCH_REASON_FREE_RESIZE
                        : RELAUNCH_REASON_WINDOWING_MODE_RESIZE;
            } else {
                mRelaunchReason = RELAUNCH_REASON_NONE;
            }
            if (!attachedToProcess()) {
                if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                        "Config is destroying non-running " + this);
                destroyImmediately(true /* removeFromApp */, "config");
            } else if (mState == PAUSING) {
                // A little annoying: we are waiting for this activity to finish pausing. Let's not
                // do anything now, but just flag that it needs to be restarted when done pausing.
                if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                        "Config is skipping already pausing " + this);
                deferRelaunchUntilPaused = true;
                preserveWindowOnDeferredRelaunch = preserveWindow;
                return true;
            } else {
                if (DEBUG_SWITCH || DEBUG_CONFIGURATION) Slog.v(TAG_CONFIGURATION,
                        "Config is relaunching " + this);
                if (DEBUG_STATES && !mVisibleRequested) {
                    Slog.v(TAG_STATES, "Config is relaunching invisible activity " + this
                            + " called by " + Debug.getCallers(4));
                }
                relaunchActivityLocked(preserveWindow);
            }

            // All done...  tell the caller we weren't able to keep this activity around.
            return false;
        }

        // Default case: the activity can handle this new configuration, so hand it over.
        // NOTE: We only forward the override configuration as the system level configuration
        // changes is always sent to all processes when they happen so it can just use whatever
        // system level configuration it last got.
        if (displayChanged) {
            scheduleActivityMovedToDisplay(newDisplayId, newMergedOverrideConfig);
        } else {
            scheduleConfigurationChanged(newMergedOverrideConfig);
        }
        stopFreezingScreenLocked(false);

        return true;
    }

    /** Get process configuration, or global config if the process is not set. */
    private Configuration getProcessGlobalConfiguration() {
        return app != null ? app.getConfiguration() : mAtmService.getGlobalConfiguration();
    }

    /**
     * When assessing a configuration change, decide if the changes flags and the new configurations
     * should cause the Activity to relaunch.
     *
     * @param changes the changes due to the given configuration.
     * @param changesConfig the configuration that was used to calculate the given changes via a
     *        call to getConfigurationChanges.
     */
    private boolean shouldRelaunchLocked(int changes, Configuration changesConfig) {
        int configChanged = info.getRealConfigChanged();
        boolean onlyVrUiModeChanged = onlyVrUiModeChanged(changes, changesConfig);

        // Override for apps targeting pre-O sdks
        // If a device is in VR mode, and we're transitioning into VR ui mode, add ignore ui mode
        // to the config change.
        // For O and later, apps will be required to add configChanges="uimode" to their manifest.
        if (info.applicationInfo.targetSdkVersion < O
                && requestedVrComponent != null
                && onlyVrUiModeChanged) {
            configChanged |= CONFIG_UI_MODE;
        }

        return (changes&(~configChanged)) != 0;
    }

    /**
     * Returns true if the configuration change is solely due to the UI mode switching into or out
     * of UI_MODE_TYPE_VR_HEADSET.
     */
    private boolean onlyVrUiModeChanged(int changes, Configuration lastReportedConfig) {
        final Configuration currentConfig = getConfiguration();
        return changes == CONFIG_UI_MODE && (isInVrUiMode(currentConfig)
            != isInVrUiMode(lastReportedConfig));
    }

    private int getConfigurationChanges(Configuration lastReportedConfig) {
        // Determine what has changed.  May be nothing, if this is a config that has come back from
        // the app after going idle.  In that case we just want to leave the official config object
        // now in the activity and do nothing else.
        final Configuration currentConfig = getConfiguration();
        int changes = lastReportedConfig.diff(currentConfig);
        // We don't want to use size changes if they don't cross boundaries that are important to
        // the app.
        if ((changes & CONFIG_SCREEN_SIZE) != 0) {
            final boolean crosses = crossesHorizontalSizeThreshold(lastReportedConfig.screenWidthDp,
                    currentConfig.screenWidthDp)
                    || crossesVerticalSizeThreshold(lastReportedConfig.screenHeightDp,
                    currentConfig.screenHeightDp);
            if (!crosses) {
                changes &= ~CONFIG_SCREEN_SIZE;
            }
        }
        if ((changes & CONFIG_SMALLEST_SCREEN_SIZE) != 0) {
            final int oldSmallest = lastReportedConfig.smallestScreenWidthDp;
            final int newSmallest = currentConfig.smallestScreenWidthDp;
            if (!crossesSmallestSizeThreshold(oldSmallest, newSmallest)) {
                changes &= ~CONFIG_SMALLEST_SCREEN_SIZE;
            }
        }
        // We don't want window configuration to cause relaunches.
        if ((changes & CONFIG_WINDOW_CONFIGURATION) != 0) {
            changes &= ~CONFIG_WINDOW_CONFIGURATION;
        }

        return changes;
    }

    private static boolean isResizeOnlyChange(int change) {
        return (change & ~(CONFIG_SCREEN_SIZE | CONFIG_SMALLEST_SCREEN_SIZE | CONFIG_ORIENTATION
                | CONFIG_SCREEN_LAYOUT)) == 0;
    }

    private static boolean hasResizeChange(int change) {
        return (change & (CONFIG_SCREEN_SIZE | CONFIG_SMALLEST_SCREEN_SIZE | CONFIG_ORIENTATION
                | CONFIG_SCREEN_LAYOUT)) != 0;
    }

    void relaunchActivityLocked(boolean preserveWindow) {
        if (mAtmService.mSuppressResizeConfigChanges && preserveWindow) {
            configChangeFlags = 0;
            return;
        }

        final boolean andResume = shouldBeResumed(null /*activeActivity*/);
        List<ResultInfo> pendingResults = null;
        List<ReferrerIntent> pendingNewIntents = null;
        if (andResume) {
            pendingResults = results;
            pendingNewIntents = newIntents;
        }
        if (DEBUG_SWITCH) Slog.v(TAG_SWITCH,
                "Relaunching: " + this + " with results=" + pendingResults
                        + " newIntents=" + pendingNewIntents + " andResume=" + andResume
                        + " preserveWindow=" + preserveWindow);
        if (andResume) {
            EventLogTags.writeWmRelaunchResumeActivity(mUserId, System.identityHashCode(this),
                    task.mTaskId, shortComponentName);
        } else {
            EventLogTags.writeWmRelaunchActivity(mUserId, System.identityHashCode(this),
                    task.mTaskId, shortComponentName);
        }

        startFreezingScreenLocked(0);

        try {
            if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH,
                    "Moving to " + (andResume ? "RESUMED" : "PAUSED") + " Relaunching " + this
                            + " callers=" + Debug.getCallers(6));
            forceNewConfig = false;
            startRelaunching();
            final ClientTransactionItem callbackItem = ActivityRelaunchItem.obtain(pendingResults,
                    pendingNewIntents, configChangeFlags,
                    new MergedConfiguration(getProcessGlobalConfiguration(),
                            getMergedOverrideConfiguration()),
                    preserveWindow);
            final ActivityLifecycleItem lifecycleItem;
            if (andResume) {
                lifecycleItem = ResumeActivityItem.obtain(
                        getDisplay().mDisplayContent.isNextTransitionForward());
            } else {
                lifecycleItem = PauseActivityItem.obtain();
            }
            final ClientTransaction transaction = ClientTransaction.obtain(app.getThread(), appToken);
            transaction.addCallback(callbackItem);
            transaction.setLifecycleStateRequest(lifecycleItem);
            mAtmService.getLifecycleManager().scheduleTransaction(transaction);
            // Note: don't need to call pauseIfSleepingLocked() here, because the caller will only
            // request resume if this activity is currently resumed, which implies we aren't
            // sleeping.
        } catch (RemoteException e) {
            if (DEBUG_SWITCH || DEBUG_STATES) Slog.i(TAG_SWITCH, "Relaunch failed", e);
        }

        if (andResume) {
            if (DEBUG_STATES) {
                Slog.d(TAG_STATES, "Resumed after relaunch " + this);
            }
            results = null;
            newIntents = null;
            mAtmService.getAppWarningsLocked().onResumeActivity(this);
        } else {
            removePauseTimeout();
            setState(PAUSED, "relaunchActivityLocked");
        }

        configChangeFlags = 0;
        deferRelaunchUntilPaused = false;
        preserveWindowOnDeferredRelaunch = false;
    }

    /**
     * Request the process of the activity to restart with its saved state (from
     * {@link android.app.Activity#onSaveInstanceState}) if possible. It also forces to recompute
     * the override configuration. Note if the activity is in background, the process will be killed
     * directly with keeping its record.
     */
    void restartProcessIfVisible() {
        Slog.i(TAG, "Request to restart process of " + this);

        // Reset the existing override configuration so it can be updated according to the latest
        // configuration.
        clearSizeCompatMode();
        if (mVisibleRequested) {
            // Configuration will be ensured when becoming visible, so if it is already visible,
            // then the manual update is needed.
            updateSizeCompatMode();
        }

        if (!attachedToProcess()) {
            return;
        }

        // The restarting state avoids removing this record when process is died.
        setState(RESTARTING_PROCESS, "restartActivityProcess");

        if (!mVisibleRequested || mHaveState) {
            // Kill its process immediately because the activity should be in background.
            // The activity state will be update to {@link #DESTROYED} in
            // {@link ActivityStack#cleanUp} when handling process died.
            mAtmService.mH.post(() -> {
                final WindowProcessController wpc;
                synchronized (mAtmService.mGlobalLock) {
                    if (!hasProcess()
                            || app.getReportedProcState() <= PROCESS_STATE_IMPORTANT_FOREGROUND) {
                        return;
                    }
                    wpc = app;
                }
                mAtmService.mAmInternal.killProcess(wpc.mName, wpc.mUid, "resetConfig");
            });
            return;
        }

        if (getParent() != null) {
            startFreezingScreen();
        }
        // The process will be killed until the activity reports stopped with saved state (see
        // {@link ActivityTaskManagerService.activityStopped}).
        try {
            mAtmService.getLifecycleManager().scheduleTransaction(app.getThread(), appToken,
                    StopActivityItem.obtain(0 /* configChanges */));
        } catch (RemoteException e) {
            Slog.w(TAG, "Exception thrown during restart " + this, e);
        }
        mStackSupervisor.scheduleRestartTimeout(this);
    }

    boolean isProcessRunning() {
        WindowProcessController proc = app;
        if (proc == null) {
            proc = mAtmService.mProcessNames.get(processName, info.applicationInfo.uid);
        }
        return proc != null && proc.hasThread();
    }

    /**
     * @return Whether a task snapshot starting window may be shown.
     */
    private boolean allowTaskSnapshot() {
        if (newIntents == null) {
            return true;
        }

        // Restrict task snapshot starting window to launcher start, or is same as the last
        // delivered intent, or there is no intent at all (eg. task being brought to front). If
        // the intent is something else, likely the app is going to show some specific page or
        // view, instead of what's left last time.
        for (int i = newIntents.size() - 1; i >= 0; i--) {
            final Intent intent = newIntents.get(i);
            if (intent == null || ActivityRecord.isMainIntent(intent)) {
                continue;
            }

            final boolean sameIntent = mLastNewIntent != null ? mLastNewIntent.filterEquals(intent)
                    : this.intent.filterEquals(intent);
            if (!sameIntent || intent.getExtras() != null) {
                return false;
            }
        }
        return true;
    }

    /**
     * Returns {@code true} if the associated activity has the no history flag set on it.
     * {@code false} otherwise.
     */
    boolean isNoHistory() {
        return (intent.getFlags() & FLAG_ACTIVITY_NO_HISTORY) != 0
                || (info.flags & FLAG_NO_HISTORY) != 0;
    }

    void saveToXml(XmlSerializer out) throws IOException, XmlPullParserException {
        out.attribute(null, ATTR_ID, String.valueOf(createTime));
        out.attribute(null, ATTR_LAUNCHEDFROMUID, String.valueOf(launchedFromUid));
        if (launchedFromPackage != null) {
            out.attribute(null, ATTR_LAUNCHEDFROMPACKAGE, launchedFromPackage);
        }
        if (launchedFromFeatureId != null) {
            out.attribute(null, ATTR_LAUNCHEDFROMFEATURE, launchedFromFeatureId);
        }
        if (resolvedType != null) {
            out.attribute(null, ATTR_RESOLVEDTYPE, resolvedType);
        }
        out.attribute(null, ATTR_COMPONENTSPECIFIED, String.valueOf(componentSpecified));
        out.attribute(null, ATTR_USERID, String.valueOf(mUserId));

        if (taskDescription != null) {
            taskDescription.saveToXml(out);
        }

        out.startTag(null, TAG_INTENT);
        intent.saveToXml(out);
        out.endTag(null, TAG_INTENT);

        if (isPersistable() && mPersistentState != null) {
            out.startTag(null, TAG_PERSISTABLEBUNDLE);
            mPersistentState.saveToXml(out);
            out.endTag(null, TAG_PERSISTABLEBUNDLE);
        }
    }

    static ActivityRecord restoreFromXml(XmlPullParser in,
            ActivityStackSupervisor stackSupervisor) throws IOException, XmlPullParserException {
        Intent intent = null;
        PersistableBundle persistentState = null;
        int launchedFromUid = 0;
        String launchedFromPackage = null;
        String launchedFromFeature = null;
        String resolvedType = null;
        boolean componentSpecified = false;
        int userId = 0;
        long createTime = -1;
        final int outerDepth = in.getDepth();
        TaskDescription taskDescription = new TaskDescription();

        for (int attrNdx = in.getAttributeCount() - 1; attrNdx >= 0; --attrNdx) {
            final String attrName = in.getAttributeName(attrNdx);
            final String attrValue = in.getAttributeValue(attrNdx);
            if (DEBUG) Slog.d(TaskPersister.TAG,
                        "ActivityRecord: attribute name=" + attrName + " value=" + attrValue);
            if (ATTR_ID.equals(attrName)) {
                createTime = Long.parseLong(attrValue);
            } else if (ATTR_LAUNCHEDFROMUID.equals(attrName)) {
                launchedFromUid = Integer.parseInt(attrValue);
            } else if (ATTR_LAUNCHEDFROMPACKAGE.equals(attrName)) {
                launchedFromPackage = attrValue;
            } else if (ATTR_LAUNCHEDFROMFEATURE.equals(attrName)) {
                launchedFromFeature = attrValue;
            } else if (ATTR_RESOLVEDTYPE.equals(attrName)) {
                resolvedType = attrValue;
            } else if (ATTR_COMPONENTSPECIFIED.equals(attrName)) {
                componentSpecified = Boolean.parseBoolean(attrValue);
            } else if (ATTR_USERID.equals(attrName)) {
                userId = Integer.parseInt(attrValue);
            } else if (!attrName.startsWith(ATTR_TASKDESCRIPTION_PREFIX)) {
                Log.d(TAG, "Unknown ActivityRecord attribute=" + attrName);
            }
        }
        taskDescription.restoreFromXml(in);

        int event;
        while (((event = in.next()) != END_DOCUMENT) &&
                (event != END_TAG || in.getDepth() >= outerDepth)) {
            if (event == START_TAG) {
                final String name = in.getName();
                if (DEBUG)
                        Slog.d(TaskPersister.TAG, "ActivityRecord: START_TAG name=" + name);
                if (TAG_INTENT.equals(name)) {
                    intent = Intent.restoreFromXml(in);
                    if (DEBUG)
                            Slog.d(TaskPersister.TAG, "ActivityRecord: intent=" + intent);
                } else if (TAG_PERSISTABLEBUNDLE.equals(name)) {
                    persistentState = PersistableBundle.restoreFromXml(in);
                    if (DEBUG) Slog.d(TaskPersister.TAG,
                            "ActivityRecord: persistentState=" + persistentState);
                } else {
                    Slog.w(TAG, "restoreActivity: unexpected name=" + name);
                    XmlUtils.skipCurrentTag(in);
                }
            }
        }

        if (intent == null) {
            throw new XmlPullParserException("restoreActivity error intent=" + intent);
        }

        final ActivityTaskManagerService service = stackSupervisor.mService;
        final ActivityInfo aInfo = stackSupervisor.resolveActivity(intent, resolvedType, 0, null,
                userId, Binder.getCallingUid());
        if (aInfo == null) {
            throw new XmlPullParserException("restoreActivity resolver error. Intent=" + intent +
                    " resolvedType=" + resolvedType);
        }
        final ActivityRecord r = new ActivityRecord(service, null /* caller */,
                0 /* launchedFromPid */, launchedFromUid, launchedFromPackage, launchedFromFeature,
                intent, resolvedType, aInfo, service.getConfiguration(), null /* resultTo */,
                null /* resultWho */, 0 /* reqCode */, componentSpecified,
                false /* rootVoiceInteraction */, stackSupervisor, null /* options */,
                null /* sourceRecord */);

        r.mPersistentState = persistentState;
        r.taskDescription = taskDescription;
        r.createTime = createTime;

        return r;
    }

    private static boolean isInVrUiMode(Configuration config) {
        return (config.uiMode & UI_MODE_TYPE_MASK) == UI_MODE_TYPE_VR_HEADSET;
    }

    int getUid() {
        return info.applicationInfo.uid;
    }

    boolean isUid(int uid) {
        return info.applicationInfo.uid == uid;
    }

    int getPid() {
        return app != null ? app.getPid() : 0;
    }

    /**
     * Determines whether this ActivityRecord can turn the screen on. It checks whether the flag
     * {@link ActivityRecord#getTurnScreenOnFlag} is set and checks whether the ActivityRecord
     * should be visible depending on Keyguard state
     *
     * @return true if the screen can be turned on, false otherwise.
     */
    boolean canTurnScreenOn() {
        if (!getTurnScreenOnFlag()) {
            return false;
        }
        final ActivityStack stack = getRootTask();
        return stack != null &&
                stack.checkKeyguardVisibility(this, true /* shouldBeVisible */,
                        stack.topRunningActivity() == this /* isTop */);
    }

    void setTurnScreenOn(boolean turnScreenOn) {
        mTurnScreenOn = turnScreenOn;
    }

    boolean getTurnScreenOnFlag() {
        return mTurnScreenOn || containsTurnScreenOnWindow();
    }

    private boolean containsTurnScreenOnWindow() {
        // When we are relaunching, it is possible for us to be unfrozen before our previous
        // windows have been added back. Using the cached value ensures that our previous
        // showWhenLocked preference is honored until relaunching is complete.
        if (isRelaunching()) {
            return mLastContainsTurnScreenOnWindow;
        }
        for (int i = mChildren.size() - 1; i >= 0; i--) {
            if ((mChildren.get(i).mAttrs.flags & LayoutParams.FLAG_TURN_SCREEN_ON) != 0) {
                return true;
            }
        }
        return false;
    }

    /**
     * Check if this activity is able to resume. For pre-Q apps, only the topmost activities of each
     * process are allowed to be resumed.
     *
     * @return true if this activity can be resumed.
     */
    boolean canResumeByCompat() {
        return app == null || app.updateTopResumingActivityInProcessIfNeeded(this);
    }

    boolean isTopRunningActivity() {
        return mRootWindowContainer.topRunningActivity() == this;
    }

    /**
     * @return {@code true} if this is the resumed activity on its current display, {@code false}
     * otherwise.
     */
    boolean isResumedActivityOnDisplay() {
        final DisplayContent display = getDisplay();
        if (display == null) {
            return false;
        }
        for (int tdaNdx = display.getTaskDisplayAreaCount() - 1; tdaNdx >= 0; --tdaNdx) {
            final TaskDisplayArea taskDisplayArea = display.getTaskDisplayAreaAt(tdaNdx);
            final ActivityRecord resumedActivity = taskDisplayArea.getFocusedActivity();
            if (resumedActivity != null) {
                return resumedActivity == this;
            }
        }
        return false;
    }


    /**
     * Check if this is the root of the task - first activity that is not finishing, starting from
     * the bottom of the task. If all activities are finishing - then this method will return
     * {@code true} if the activity is at the bottom.
     *
     * NOTE: This is different from 'effective root' - an activity that defines the task identity.
     */
    boolean isRootOfTask() {
        if (task == null) {
            return false;
        }
        final ActivityRecord rootActivity = task.getRootActivity(true);
        return this == rootActivity;
    }

    void setTaskOverlay(boolean taskOverlay) {
        mTaskOverlay = taskOverlay;
        setAlwaysOnTop(mTaskOverlay);
    }

    boolean isTaskOverlay() {
        return mTaskOverlay;
    }

    @Override
    boolean showToCurrentUser() {
        return mShowForAllUsers || mWmService.isCurrentProfile(mUserId);
    }

    @Override
    public String toString() {
        if (stringName != null) {
            return stringName + " t" + (task == null ? INVALID_TASK_ID : task.mTaskId) +
                    (finishing ? " f}" : "") + (mIsExiting ? " mIsExiting=" : "") + "}";
        }
        StringBuilder sb = new StringBuilder(128);
        sb.append("ActivityRecord{");
        sb.append(Integer.toHexString(System.identityHashCode(this)));
        sb.append(" u");
        sb.append(mUserId);
        sb.append(' ');
        sb.append(intent.getComponent().flattenToShortString());
        stringName = sb.toString();
        return stringName;
    }

    /**
     * Write all fields to an {@code ActivityRecordProto}. This assumes the
     * {@code ActivityRecordProto} is the outer-most proto data.
     */
    void dumpDebug(ProtoOutputStream proto, @WindowTraceLogLevel int logLevel) {
        writeNameToProto(proto, NAME);
        super.dumpDebug(proto, WINDOW_TOKEN, logLevel);
        proto.write(LAST_SURFACE_SHOWING, mLastSurfaceShowing);
        proto.write(IS_WAITING_FOR_TRANSITION_START, isWaitingForTransitionStart());
        proto.write(IS_ANIMATING, isAnimating(PARENTS));
        if (mThumbnail != null){
            mThumbnail.dumpDebug(proto, THUMBNAIL);
        }
        proto.write(FILLS_PARENT, fillsParent());
        proto.write(APP_STOPPED, mAppStopped);
        proto.write(TRANSLUCENT, !occludesParent());
        proto.write(VISIBLE, mVisible);
        proto.write(VISIBLE_REQUESTED, mVisibleRequested);
        proto.write(CLIENT_VISIBLE, mClientVisible);
        proto.write(DEFER_HIDING_CLIENT, mDeferHidingClient);
        proto.write(REPORTED_DRAWN, reportedDrawn);
        proto.write(REPORTED_VISIBLE, reportedVisible);
        proto.write(NUM_INTERESTING_WINDOWS, mNumInterestingWindows);
        proto.write(NUM_DRAWN_WINDOWS, mNumDrawnWindows);
        proto.write(ALL_DRAWN, allDrawn);
        proto.write(LAST_ALL_DRAWN, mLastAllDrawn);
        if (startingWindow != null) {
            startingWindow.writeIdentifierToProto(proto, STARTING_WINDOW);
        }
        proto.write(STARTING_DISPLAYED, startingDisplayed);
        proto.write(STARTING_MOVED, startingMoved);
        proto.write(VISIBLE_SET_FROM_TRANSFERRED_STARTING_WINDOW,
                mVisibleSetFromTransferredStartingWindow);
        for (Rect bounds : mFrozenBounds) {
            bounds.dumpDebug(proto, FROZEN_BOUNDS);
        }

        writeIdentifierToProto(proto, IDENTIFIER);
        proto.write(STATE, mState.toString());
        proto.write(FRONT_OF_TASK, isRootOfTask());
        if (hasProcess()) {
            proto.write(PROC_ID, app.getPid());
        }
    }

    @Override
    long getProtoFieldId() {
        return ACTIVITY;
    }

    @Override
    public void dumpDebug(ProtoOutputStream proto, long fieldId,
            @WindowTraceLogLevel int logLevel) {
        // Critical log level logs only visible elements to mitigate performance overheard
        if (logLevel == WindowTraceLogLevel.CRITICAL && !isVisible()) {
            return;
        }

        final long token = proto.start(fieldId);
        dumpDebug(proto, logLevel);
        proto.end(token);
    }

    void writeNameToProto(ProtoOutputStream proto, long fieldId) {
        if (appToken != null) {
            proto.write(fieldId, appToken.getName());
        }
    }

    @Override
    void writeIdentifierToProto(ProtoOutputStream proto, long fieldId) {
        final long token = proto.start(fieldId);
        proto.write(HASH_CODE, System.identityHashCode(this));
        proto.write(USER_ID, mUserId);
        proto.write(TITLE, intent.getComponent().flattenToShortString());
        proto.end(token);
    }

    /**
     * The precomputed insets of the display in each rotation. This is used to make the size
     * compatibility mode activity compute the configuration without relying on its current display.
     * This currently only supports fullscreen and freeform windowing mode.
     */
    static class CompatDisplayInsets {
        private final int mWidth;
        private final int mHeight;
        final boolean mIsFloating;
        final boolean mIsRotatable;

        /**
         * The nonDecorInsets for each rotation. Includes the navigation bar and cutout insets. It
         * is used to compute the appBounds.
         */
        final Rect[] mNonDecorInsets = new Rect[4];
        /**
         * The stableInsets for each rotation. Includes the status bar inset and the
         * nonDecorInsets. It is used to compute {@link Configuration#screenWidthDp} and
         * {@link Configuration#screenHeightDp}.
         */
        final Rect[] mStableInsets = new Rect[4];

        /** Constructs the environment to simulate the bounds behavior of the given container. */
        CompatDisplayInsets(DisplayContent display, WindowContainer container) {
            mIsFloating = container.getWindowConfiguration().tasksAreFloating();
            mIsRotatable = !mIsFloating && !display.ignoreRotationForApps();
            if (mIsFloating) {
                final Rect containerBounds = container.getWindowConfiguration().getBounds();
                mWidth = containerBounds.width();
                mHeight = containerBounds.height();
                // For apps in freeform, the task bounds are the parent bounds from the app's
                // perspective. No insets because within a window.
                final Rect emptyRect = new Rect();
                for (int rotation = 0; rotation < 4; rotation++) {
                    mNonDecorInsets[rotation] = emptyRect;
                    mStableInsets[rotation] = emptyRect;
                }
                return;
            }

            // If the activity is not floating, assume it fills the display.
            mWidth = display.mBaseDisplayWidth;
            mHeight = display.mBaseDisplayHeight;
            final DisplayPolicy policy = display.getDisplayPolicy();
            for (int rotation = 0; rotation < 4; rotation++) {
                mNonDecorInsets[rotation] = new Rect();
                mStableInsets[rotation] = new Rect();
                final boolean rotated = (rotation == ROTATION_90 || rotation == ROTATION_270);
                final int dw = rotated ? mHeight : mWidth;
                final int dh = rotated ? mWidth : mHeight;
                final DisplayCutout cutout = display.calculateDisplayCutoutForRotation(rotation)
                        .getDisplayCutout();
                policy.getNonDecorInsetsLw(rotation, dw, dh, cutout, mNonDecorInsets[rotation]);
                mStableInsets[rotation].set(mNonDecorInsets[rotation]);
                policy.convertNonDecorInsetsToStableInsets(mStableInsets[rotation], rotation);
            }
        }

        void getBoundsByRotation(Rect outBounds, int rotation) {
            final boolean rotated = (rotation == ROTATION_90 || rotation == ROTATION_270);
            final int dw = rotated ? mHeight : mWidth;
            final int dh = rotated ? mWidth : mHeight;
            outBounds.set(0, 0, dw, dh);
        }

        void getFrameByOrientation(Rect outBounds, int orientation) {
            final int longSide = Math.max(mWidth, mHeight);
            final int shortSide = Math.min(mWidth, mHeight);
            final boolean isLandscape = orientation == ORIENTATION_LANDSCAPE;
            outBounds.set(0, 0, isLandscape ? longSide : shortSide,
                    isLandscape ? shortSide : longSide);
        }

        /** Gets the horizontal centered container bounds for size compatibility mode. */
        void getContainerBounds(Rect outAppBounds, Rect outBounds, int rotation, int orientation,
                boolean orientationRequested, boolean canChangeOrientation) {
            if (mIsFloating) {
                getFrameByOrientation(outBounds, orientation);
                outAppBounds.set(outBounds);
                return;
            }

            if (mIsRotatable && canChangeOrientation) {
                getBoundsByRotation(outBounds, rotation);
                if (orientationRequested) {
                    getFrameByOrientation(outAppBounds, orientation);
                } else {
                    outAppBounds.set(outBounds);
                }
            } else {
                outBounds.set(0, 0, mWidth, mHeight);
                getFrameByOrientation(outAppBounds, orientation);
                if (orientationRequested && !canChangeOrientation
                        && (outAppBounds.width() > outAppBounds.height()) != (mWidth > mHeight)) {
                    // The orientation is mismatched but the display cannot rotate. The bounds will
                    // fit to the short side of display.
                    if (orientation == ORIENTATION_LANDSCAPE) {
                        outAppBounds.bottom = (int) ((float) mWidth * mWidth / mHeight);
                        outAppBounds.right = mWidth;
                    } else {
                        outAppBounds.bottom = mHeight;
                        outAppBounds.right = (int) ((float) mHeight * mHeight / mWidth);
                    }
                    outAppBounds.offset(getHorizontalCenterOffset(outBounds.width(),
                            outAppBounds.width()), 0 /* dy */);
                } else {
                    outAppBounds.set(outBounds);
                }
            }

            if (rotation != ROTATION_UNDEFINED) {
                // Ensure the app bounds won't overlap with insets.
                Task.intersectWithInsetsIfFits(outAppBounds, outBounds, mNonDecorInsets[rotation]);
            }
        }
    }

    private static class AppSaturationInfo {
        float[] mMatrix = new float[9];
        float[] mTranslation = new float[3];

        void setSaturation(@Size(9) float[] matrix, @Size(3) float[] translation) {
            System.arraycopy(matrix, 0, mMatrix, 0, mMatrix.length);
            System.arraycopy(translation, 0, mTranslation, 0, mTranslation.length);
        }
    }

    @Override
    RemoteAnimationTarget createRemoteAnimationTarget(
            RemoteAnimationController.RemoteAnimationRecord record) {
        final WindowState mainWindow = findMainWindow();
        if (task == null || mainWindow == null) {
            return null;
        }
        final Rect insets = new Rect();
        mainWindow.getContentInsets(insets);
        InsetUtils.addInsets(insets, getLetterboxInsets());
        return new RemoteAnimationTarget(task.mTaskId, record.getMode(),
                record.mAdapter.mCapturedLeash, !fillsParent(),
                mainWindow.mWinAnimator.mLastClipRect, insets,
                getPrefixOrderIndex(), record.mAdapter.mPosition, record.mAdapter.mLocalBounds,
                record.mAdapter.mStackBounds, task.getWindowConfiguration(),
                false /*isNotInRecents*/,
                record.mThumbnailAdapter != null ? record.mThumbnailAdapter.mCapturedLeash : null,
                record.mStartBounds);
    }

    @Override
    boolean canCreateRemoteAnimationTarget() {
        return true;
    }

    @Override
    void getAnimationFrames(Rect outFrame, Rect outInsets, Rect outStableInsets,
            Rect outSurfaceInsets) {
        final WindowState win = findMainWindow();
        if (win == null) {
            return;
        }
        win.getAnimationFrames(outFrame, outInsets, outStableInsets, outSurfaceInsets);
    }

    void setPictureInPictureParams(PictureInPictureParams p) {
        pictureInPictureArgs.copyOnlySet(p);
        getTask().getRootTask().onPictureInPictureParamsChanged();
    }
}