| /* |
| * Copyright (C) 2015 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.systemui.recents; |
| |
| import static android.app.ActivityManager.StackId.FREEFORM_WORKSPACE_STACK_ID; |
| |
| import android.app.ActivityManager; |
| import android.app.ActivityOptions; |
| import android.content.ActivityNotFoundException; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.res.Resources; |
| import android.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.graphics.Rect; |
| import android.graphics.RectF; |
| import android.graphics.drawable.Drawable; |
| import android.os.Handler; |
| import android.os.SystemClock; |
| import android.os.UserHandle; |
| import android.util.Log; |
| import android.util.MutableBoolean; |
| import android.view.AppTransitionAnimationSpec; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.ViewConfiguration; |
| |
| import com.android.internal.logging.MetricsLogger; |
| import com.android.systemui.R; |
| import com.android.systemui.SystemUIApplication; |
| import com.android.systemui.recents.events.EventBus; |
| import com.android.systemui.recents.events.activity.DockedTopTaskEvent; |
| import com.android.systemui.recents.events.activity.EnterRecentsWindowLastAnimationFrameEvent; |
| import com.android.systemui.recents.events.activity.ForcedResizableEvent; |
| import com.android.systemui.recents.events.activity.HideRecentsEvent; |
| import com.android.systemui.recents.events.activity.IterateRecentsEvent; |
| import com.android.systemui.recents.events.activity.LaunchNextTaskRequestEvent; |
| import com.android.systemui.recents.events.activity.RecentsActivityStartingEvent; |
| import com.android.systemui.recents.events.activity.ToggleRecentsEvent; |
| import com.android.systemui.recents.events.component.RecentsVisibilityChangedEvent; |
| import com.android.systemui.recents.events.component.ScreenPinningRequestEvent; |
| import com.android.systemui.recents.events.ui.DraggingInRecentsEndedEvent; |
| import com.android.systemui.recents.events.ui.DraggingInRecentsEvent; |
| import com.android.systemui.recents.misc.DozeTrigger; |
| import com.android.systemui.recents.misc.ForegroundThread; |
| import com.android.systemui.recents.misc.SystemServicesProxy; |
| import com.android.systemui.recents.misc.SystemServicesProxy.TaskStackListener; |
| import com.android.systemui.recents.model.RecentsTaskLoadPlan; |
| import com.android.systemui.recents.model.RecentsTaskLoader; |
| import com.android.systemui.recents.model.Task; |
| import com.android.systemui.recents.model.TaskGrouping; |
| import com.android.systemui.recents.model.TaskStack; |
| import com.android.systemui.recents.views.TaskStackLayoutAlgorithm; |
| import com.android.systemui.recents.views.TaskStackView; |
| import com.android.systemui.recents.views.TaskStackViewScroller; |
| import com.android.systemui.recents.views.TaskViewHeader; |
| import com.android.systemui.recents.views.TaskViewTransform; |
| import com.android.systemui.statusbar.BaseStatusBar; |
| import com.android.systemui.statusbar.phone.NavigationBarGestureHelper; |
| import com.android.systemui.statusbar.phone.PhoneStatusBar; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * An implementation of the Recents component for the current user. For secondary users, this can |
| * be called remotely from the system user. |
| */ |
| public class RecentsImpl implements ActivityOptions.OnAnimationFinishedListener { |
| |
| private final static String TAG = "RecentsImpl"; |
| |
| // The minimum amount of time between each recents button press that we will handle |
| private final static int MIN_TOGGLE_DELAY_MS = 350; |
| |
| // The duration within which the user releasing the alt tab (from when they pressed alt tab) |
| // that the fast alt-tab animation will run. If the user's alt-tab takes longer than this |
| // duration, then we will toggle recents after this duration. |
| private final static int FAST_ALT_TAB_DELAY_MS = 225; |
| |
| public final static String RECENTS_PACKAGE = "com.android.systemui"; |
| public final static String RECENTS_ACTIVITY = "com.android.systemui.recents.RecentsActivity"; |
| |
| /** |
| * An implementation of TaskStackListener, that allows us to listen for changes to the system |
| * task stacks and update recents accordingly. |
| */ |
| class TaskStackListenerImpl extends TaskStackListener { |
| @Override |
| public void onTaskStackChanged() { |
| // Preloads the next task |
| RecentsConfiguration config = Recents.getConfiguration(); |
| if (config.svelteLevel == RecentsConfiguration.SVELTE_NONE) { |
| RecentsTaskLoader loader = Recents.getTaskLoader(); |
| SystemServicesProxy ssp = Recents.getSystemServices(); |
| ActivityManager.RunningTaskInfo runningTaskInfo = ssp.getTopMostTask(); |
| |
| // Load the next task only if we aren't svelte |
| RecentsTaskLoadPlan plan = loader.createLoadPlan(mContext); |
| loader.preloadTasks(plan, -1, true /* isTopTaskHome */); |
| RecentsTaskLoadPlan.Options launchOpts = new RecentsTaskLoadPlan.Options(); |
| // This callback is made when a new activity is launched and the old one is paused |
| // so ignore the current activity and try and preload the thumbnail for the |
| // previous one. |
| if (runningTaskInfo != null) { |
| launchOpts.runningTaskId = runningTaskInfo.id; |
| } |
| launchOpts.numVisibleTasks = 2; |
| launchOpts.numVisibleTaskThumbnails = 2; |
| launchOpts.onlyLoadForCache = true; |
| launchOpts.onlyLoadPausedActivities = true; |
| loader.loadTasks(mContext, plan, launchOpts); |
| } |
| } |
| |
| @Override |
| public void onActivityForcedResizable(String packageName, int taskId) { |
| EventBus.getDefault().sendOntoMainThread( |
| new ForcedResizableEvent(packageName, taskId)); |
| |
| } |
| } |
| |
| protected static RecentsTaskLoadPlan sInstanceLoadPlan; |
| |
| protected Context mContext; |
| protected Handler mHandler; |
| TaskStackListenerImpl mTaskStackListener; |
| boolean mDraggingInRecents; |
| boolean mLaunchedWhileDocking; |
| |
| // Task launching |
| Rect mTaskStackBounds = new Rect(); |
| Rect mLastTaskViewBounds = new Rect(); |
| TaskViewTransform mTmpTransform = new TaskViewTransform(); |
| int mStatusBarHeight; |
| int mNavBarHeight; |
| int mNavBarWidth; |
| int mTaskBarHeight; |
| |
| // Header (for transition) |
| TaskViewHeader mHeaderBar; |
| final Object mHeaderBarLock = new Object(); |
| protected TaskStackView mDummyStackView; |
| |
| // Variables to keep track of if we need to start recents after binding |
| protected boolean mTriggeredFromAltTab; |
| protected long mLastToggleTime; |
| DozeTrigger mFastAltTabTrigger = new DozeTrigger(FAST_ALT_TAB_DELAY_MS, new Runnable() { |
| @Override |
| public void run() { |
| // When this fires, then the user has not released alt-tab for at least |
| // FAST_ALT_TAB_DELAY_MS milliseconds |
| showRecents(mTriggeredFromAltTab, false /* draggingInRecents */, true /* animate */, |
| false /* reloadTasks */); |
| } |
| }); |
| |
| protected Bitmap mThumbnailTransitionBitmapCache; |
| Task mThumbnailTransitionBitmapCacheKey; |
| |
| public RecentsImpl(Context context) { |
| mContext = context; |
| mHandler = new Handler(); |
| |
| // Initialize the static foreground thread |
| ForegroundThread.get(); |
| |
| // Register the task stack listener |
| mTaskStackListener = new TaskStackListenerImpl(); |
| SystemServicesProxy ssp = Recents.getSystemServices(); |
| ssp.registerTaskStackListener(mTaskStackListener); |
| |
| // Initialize the static configuration resources |
| reloadHeaderBarLayout(); |
| updateHeaderBarLayout(null /* stack */); |
| |
| // When we start, preload the data associated with the previous recent tasks. |
| // We can use a new plan since the caches will be the same. |
| RecentsTaskLoader loader = Recents.getTaskLoader(); |
| RecentsTaskLoadPlan plan = loader.createLoadPlan(mContext); |
| loader.preloadTasks(plan, -1, true /* isTopTaskHome */); |
| RecentsTaskLoadPlan.Options launchOpts = new RecentsTaskLoadPlan.Options(); |
| launchOpts.numVisibleTasks = loader.getIconCacheSize(); |
| launchOpts.numVisibleTaskThumbnails = loader.getThumbnailCacheSize(); |
| launchOpts.onlyLoadForCache = true; |
| loader.loadTasks(mContext, plan, launchOpts); |
| } |
| |
| public void onBootCompleted() { |
| updateHeaderBarLayout(null /* stack */); |
| } |
| |
| public void onConfigurationChanged() { |
| reloadHeaderBarLayout(); |
| updateHeaderBarLayout(null /* stack */); |
| } |
| |
| /** |
| * This is only called from the system user's Recents. Secondary users will instead proxy their |
| * visibility change events through to the system user via |
| * {@link Recents#onBusEvent(RecentsVisibilityChangedEvent)}. |
| */ |
| public void onVisibilityChanged(Context context, boolean visible) { |
| SystemUIApplication app = (SystemUIApplication) context; |
| PhoneStatusBar statusBar = app.getComponent(PhoneStatusBar.class); |
| if (statusBar != null) { |
| statusBar.updateRecentsVisibility(visible); |
| } |
| } |
| |
| /** |
| * This is only called from the system user's Recents. Secondary users will instead proxy their |
| * visibility change events through to the system user via |
| * {@link Recents#onBusEvent(ScreenPinningRequestEvent)}. |
| */ |
| public void onStartScreenPinning(Context context) { |
| SystemUIApplication app = (SystemUIApplication) context; |
| PhoneStatusBar statusBar = app.getComponent(PhoneStatusBar.class); |
| if (statusBar != null) { |
| statusBar.showScreenPinningRequest(false); |
| } |
| } |
| |
| public void showRecents(boolean triggeredFromAltTab, boolean draggingInRecents, |
| boolean animate, boolean launchedWhileDockingTask) { |
| mTriggeredFromAltTab = triggeredFromAltTab; |
| mDraggingInRecents = draggingInRecents; |
| mLaunchedWhileDocking = launchedWhileDockingTask; |
| if (mFastAltTabTrigger.isAsleep()) { |
| // Fast alt-tab duration has elapsed, fall through to showing Recents and reset |
| mFastAltTabTrigger.stopDozing(); |
| } else if (mFastAltTabTrigger.isDozing()) { |
| // Fast alt-tab duration has not elapsed. If this is triggered by a different |
| // showRecents() call, then ignore that call for now. |
| // TODO: We can not handle quick tabs that happen between the initial showRecents() call |
| // that started the activity and the activity starting up. The severity of this |
| // is inversely proportional to the FAST_ALT_TAB_DELAY_MS duration though. |
| if (!triggeredFromAltTab) { |
| return; |
| } |
| mFastAltTabTrigger.stopDozing(); |
| } else if (triggeredFromAltTab) { |
| // The fast alt-tab detector is not yet running, so start the trigger and wait for the |
| // hideRecents() call, or for the fast alt-tab duration to elapse |
| mFastAltTabTrigger.startDozing(); |
| return; |
| } |
| |
| try { |
| // Check if the top task is in the home stack, and start the recents activity |
| SystemServicesProxy ssp = Recents.getSystemServices(); |
| ActivityManager.RunningTaskInfo topTask = ssp.getTopMostTask(); |
| MutableBoolean isTopTaskHome = new MutableBoolean(true); |
| if (topTask == null || !ssp.isRecentsTopMost(topTask, isTopTaskHome)) { |
| startRecentsActivity(topTask, isTopTaskHome.value, animate); |
| } |
| } catch (ActivityNotFoundException e) { |
| Log.e(TAG, "Failed to launch RecentsActivity", e); |
| } |
| } |
| |
| public void hideRecents(boolean triggeredFromAltTab, boolean triggeredFromHomeKey) { |
| if (triggeredFromAltTab && mFastAltTabTrigger.isDozing()) { |
| // The user has released alt-tab before the trigger has run, so just show the next |
| // task immediately |
| showNextTask(); |
| |
| // Cancel the fast alt-tab trigger |
| mFastAltTabTrigger.stopDozing(); |
| return; |
| } |
| |
| // Defer to the activity to handle hiding recents, if it handles it, then it must still |
| // be visible |
| EventBus.getDefault().post(new HideRecentsEvent(triggeredFromAltTab, |
| triggeredFromHomeKey)); |
| } |
| |
| public void toggleRecents() { |
| // Skip this toggle if we are already waiting to trigger recents via alt-tab |
| if (mFastAltTabTrigger.isDozing()) { |
| return; |
| } |
| |
| mDraggingInRecents = false; |
| mLaunchedWhileDocking = false; |
| mTriggeredFromAltTab = false; |
| |
| try { |
| SystemServicesProxy ssp = Recents.getSystemServices(); |
| ActivityManager.RunningTaskInfo topTask = ssp.getTopMostTask(); |
| MutableBoolean isTopTaskHome = new MutableBoolean(true); |
| long elapsedTime = SystemClock.elapsedRealtime() - mLastToggleTime; |
| |
| if (topTask != null && ssp.isRecentsTopMost(topTask, isTopTaskHome)) { |
| RecentsDebugFlags debugFlags = Recents.getDebugFlags(); |
| RecentsConfiguration config = Recents.getConfiguration(); |
| RecentsActivityLaunchState launchState = config.getLaunchState(); |
| if (!launchState.launchedWithAltTab) { |
| // If the user taps quickly |
| if (!debugFlags.isPagingEnabled() || |
| (ViewConfiguration.getDoubleTapMinTime() < elapsedTime && |
| elapsedTime < ViewConfiguration.getDoubleTapTimeout())) { |
| // Launch the next focused task |
| EventBus.getDefault().post(new LaunchNextTaskRequestEvent()); |
| } else { |
| // Notify recents to move onto the next task |
| EventBus.getDefault().post(new IterateRecentsEvent()); |
| } |
| } else { |
| // If the user has toggled it too quickly, then just eat up the event here (it's |
| // better than showing a janky screenshot). |
| // NOTE: Ideally, the screenshot mechanism would take the window transform into |
| // account |
| if (elapsedTime < MIN_TOGGLE_DELAY_MS) { |
| return; |
| } |
| |
| EventBus.getDefault().post(new ToggleRecentsEvent()); |
| mLastToggleTime = SystemClock.elapsedRealtime(); |
| } |
| return; |
| } else { |
| // If the user has toggled it too quickly, then just eat up the event here (it's |
| // better than showing a janky screenshot). |
| // NOTE: Ideally, the screenshot mechanism would take the window transform into |
| // account |
| if (elapsedTime < MIN_TOGGLE_DELAY_MS) { |
| return; |
| } |
| |
| // Otherwise, start the recents activity |
| startRecentsActivity(topTask, isTopTaskHome.value, true /* animate */); |
| |
| // Only close the other system windows if we are actually showing recents |
| ssp.sendCloseSystemWindows(BaseStatusBar.SYSTEM_DIALOG_REASON_RECENT_APPS); |
| mLastToggleTime = SystemClock.elapsedRealtime(); |
| } |
| } catch (ActivityNotFoundException e) { |
| Log.e(TAG, "Failed to launch RecentsActivity", e); |
| } |
| } |
| |
| public void preloadRecents() { |
| // Preload only the raw task list into a new load plan (which will be consumed by the |
| // RecentsActivity) only if there is a task to animate to. |
| SystemServicesProxy ssp = Recents.getSystemServices(); |
| ActivityManager.RunningTaskInfo topTask = ssp.getTopMostTask(); |
| MutableBoolean topTaskHome = new MutableBoolean(true); |
| if (topTask != null && !ssp.isRecentsTopMost(topTask, topTaskHome)) { |
| RecentsTaskLoader loader = Recents.getTaskLoader(); |
| sInstanceLoadPlan = loader.createLoadPlan(mContext); |
| sInstanceLoadPlan.preloadRawTasks(topTaskHome.value); |
| loader.preloadTasks(sInstanceLoadPlan, topTask.id, topTaskHome.value); |
| TaskStack stack = sInstanceLoadPlan.getTaskStack(); |
| if (stack.getTaskCount() > 0) { |
| // We try and draw the thumbnail transition bitmap in parallel before |
| // toggle/show recents is called |
| preCacheThumbnailTransitionBitmapAsync(topTask, stack, mDummyStackView); |
| } |
| } |
| } |
| |
| public void cancelPreloadingRecents() { |
| // Do nothing |
| } |
| |
| public void onDraggingInRecents(float distanceFromTop) { |
| EventBus.getDefault().sendOntoMainThread(new DraggingInRecentsEvent(distanceFromTop)); |
| } |
| |
| public void onDraggingInRecentsEnded(float velocity) { |
| EventBus.getDefault().sendOntoMainThread(new DraggingInRecentsEndedEvent(velocity)); |
| } |
| |
| /** |
| * Transitions to the next recent task in the stack. |
| */ |
| public void showNextTask() { |
| SystemServicesProxy ssp = Recents.getSystemServices(); |
| RecentsTaskLoader loader = Recents.getTaskLoader(); |
| RecentsTaskLoadPlan plan = loader.createLoadPlan(mContext); |
| loader.preloadTasks(plan, -1, true /* isTopTaskHome */); |
| TaskStack focusedStack = plan.getTaskStack(); |
| |
| // Return early if there are no tasks in the focused stack |
| if (focusedStack == null || focusedStack.getTaskCount() == 0) return; |
| |
| ActivityManager.RunningTaskInfo runningTask = ssp.getTopMostTask(); |
| // Return early if there is no running task |
| if (runningTask == null) return; |
| |
| // Find the task in the recents list |
| boolean isTopTaskHome = SystemServicesProxy.isHomeStack(runningTask.stackId); |
| ArrayList<Task> tasks = focusedStack.getStackTasks(); |
| Task toTask = null; |
| ActivityOptions launchOpts = null; |
| int taskCount = tasks.size(); |
| for (int i = taskCount - 1; i >= 1; i--) { |
| Task task = tasks.get(i); |
| if (isTopTaskHome) { |
| toTask = tasks.get(i - 1); |
| launchOpts = ActivityOptions.makeCustomAnimation(mContext, |
| R.anim.recents_launch_next_affiliated_task_target, |
| R.anim.recents_fast_toggle_app_home_exit); |
| break; |
| } else if (task.key.id == runningTask.id) { |
| toTask = tasks.get(i - 1); |
| launchOpts = ActivityOptions.makeCustomAnimation(mContext, |
| R.anim.recents_launch_prev_affiliated_task_target, |
| R.anim.recents_launch_prev_affiliated_task_source); |
| break; |
| } |
| } |
| |
| // Return early if there is no next task |
| if (toTask == null) { |
| ssp.startInPlaceAnimationOnFrontMostApplication( |
| ActivityOptions.makeCustomInPlaceAnimation(mContext, |
| R.anim.recents_launch_prev_affiliated_task_bounce)); |
| return; |
| } |
| |
| // Launch the task |
| ssp.startActivityFromRecents(mContext, toTask.key, toTask.title, launchOpts); |
| } |
| |
| /** |
| * Transitions to the next affiliated task. |
| */ |
| public void showRelativeAffiliatedTask(boolean showNextTask) { |
| SystemServicesProxy ssp = Recents.getSystemServices(); |
| RecentsTaskLoader loader = Recents.getTaskLoader(); |
| RecentsTaskLoadPlan plan = loader.createLoadPlan(mContext); |
| loader.preloadTasks(plan, -1, true /* isTopTaskHome */); |
| TaskStack focusedStack = plan.getTaskStack(); |
| |
| // Return early if there are no tasks in the focused stack |
| if (focusedStack == null || focusedStack.getTaskCount() == 0) return; |
| |
| ActivityManager.RunningTaskInfo runningTask = ssp.getTopMostTask(); |
| // Return early if there is no running task (can't determine affiliated tasks in this case) |
| if (runningTask == null) return; |
| // Return early if the running task is in the home stack (optimization) |
| if (SystemServicesProxy.isHomeStack(runningTask.stackId)) return; |
| |
| // Find the task in the recents list |
| ArrayList<Task> tasks = focusedStack.getStackTasks(); |
| Task toTask = null; |
| ActivityOptions launchOpts = null; |
| int taskCount = tasks.size(); |
| int numAffiliatedTasks = 0; |
| for (int i = 0; i < taskCount; i++) { |
| Task task = tasks.get(i); |
| if (task.key.id == runningTask.id) { |
| TaskGrouping group = task.group; |
| Task.TaskKey toTaskKey; |
| if (showNextTask) { |
| toTaskKey = group.getNextTaskInGroup(task); |
| launchOpts = ActivityOptions.makeCustomAnimation(mContext, |
| R.anim.recents_launch_next_affiliated_task_target, |
| R.anim.recents_launch_next_affiliated_task_source); |
| } else { |
| toTaskKey = group.getPrevTaskInGroup(task); |
| launchOpts = ActivityOptions.makeCustomAnimation(mContext, |
| R.anim.recents_launch_prev_affiliated_task_target, |
| R.anim.recents_launch_prev_affiliated_task_source); |
| } |
| if (toTaskKey != null) { |
| toTask = focusedStack.findTaskWithId(toTaskKey.id); |
| } |
| numAffiliatedTasks = group.getTaskCount(); |
| break; |
| } |
| } |
| |
| // Return early if there is no next task |
| if (toTask == null) { |
| if (numAffiliatedTasks > 1) { |
| if (showNextTask) { |
| ssp.startInPlaceAnimationOnFrontMostApplication( |
| ActivityOptions.makeCustomInPlaceAnimation(mContext, |
| R.anim.recents_launch_next_affiliated_task_bounce)); |
| } else { |
| ssp.startInPlaceAnimationOnFrontMostApplication( |
| ActivityOptions.makeCustomInPlaceAnimation(mContext, |
| R.anim.recents_launch_prev_affiliated_task_bounce)); |
| } |
| } |
| return; |
| } |
| |
| // Keep track of actually launched affiliated tasks |
| MetricsLogger.count(mContext, "overview_affiliated_task_launch", 1); |
| |
| // Launch the task |
| ssp.startActivityFromRecents(mContext, toTask.key, toTask.title, launchOpts); |
| } |
| |
| public void showNextAffiliatedTask() { |
| // Keep track of when the affiliated task is triggered |
| MetricsLogger.count(mContext, "overview_affiliated_task_next", 1); |
| showRelativeAffiliatedTask(true); |
| } |
| |
| public void showPrevAffiliatedTask() { |
| // Keep track of when the affiliated task is triggered |
| MetricsLogger.count(mContext, "overview_affiliated_task_prev", 1); |
| showRelativeAffiliatedTask(false); |
| } |
| |
| public void dockTopTask(int topTaskId, int dragMode, |
| int stackCreateMode, Rect initialBounds) { |
| SystemServicesProxy ssp = Recents.getSystemServices(); |
| |
| // Make sure we inform DividerView before we actually start the activity so we can change |
| // the resize mode already. |
| if (ssp.moveTaskToDockedStack(topTaskId, stackCreateMode, initialBounds)) { |
| EventBus.getDefault().send(new DockedTopTaskEvent(dragMode, initialBounds)); |
| showRecents( |
| false /* triggeredFromAltTab */, |
| dragMode == NavigationBarGestureHelper.DRAG_MODE_RECENTS, |
| false /* animate */, |
| true /* launchedWhileDockingTask*/); |
| } |
| } |
| |
| /** |
| * Returns the preloaded load plan and invalidates it. |
| */ |
| public static RecentsTaskLoadPlan consumeInstanceLoadPlan() { |
| RecentsTaskLoadPlan plan = sInstanceLoadPlan; |
| sInstanceLoadPlan = null; |
| return plan; |
| } |
| |
| /** |
| * Reloads all the layouts for the header bar transition. |
| */ |
| private void reloadHeaderBarLayout() { |
| Resources res = mContext.getResources(); |
| LayoutInflater inflater = LayoutInflater.from(mContext); |
| |
| mStatusBarHeight = res.getDimensionPixelSize( |
| com.android.internal.R.dimen.status_bar_height); |
| mNavBarHeight = res.getDimensionPixelSize( |
| com.android.internal.R.dimen.navigation_bar_height); |
| mNavBarWidth = res.getDimensionPixelSize( |
| com.android.internal.R.dimen.navigation_bar_width); |
| mTaskBarHeight = TaskStackLayoutAlgorithm.getDimensionForDevice(res, |
| R.dimen.recents_task_view_header_height, |
| R.dimen.recents_task_view_header_height, |
| R.dimen.recents_task_view_header_height, |
| R.dimen.recents_task_view_header_height_tablet_land, |
| R.dimen.recents_task_view_header_height, |
| R.dimen.recents_task_view_header_height_tablet_land); |
| mDummyStackView = new TaskStackView(mContext); |
| mHeaderBar = (TaskViewHeader) inflater.inflate(R.layout.recents_task_view_header, |
| null, false); |
| } |
| |
| /** |
| * Prepares the header bar layout for the next transition, if the task view bounds has changed |
| * since the last call, it will attempt to re-measure and layout the header bar to the new size. |
| * |
| * @param stack the stack to initialize the stack layout with |
| */ |
| private void updateHeaderBarLayout(TaskStack stack) { |
| SystemServicesProxy ssp = Recents.getSystemServices(); |
| Rect systemInsets = new Rect(); |
| ssp.getStableInsets(systemInsets); |
| Rect windowRect = ssp.getWindowRect(); |
| // When docked, the nav bar insets are consumed and the activity is measured without insets. |
| // However, the window bounds include the insets, so we need to subtract them here to make |
| // them identical. |
| if (ssp.hasDockedTask()) { |
| windowRect.bottom -= systemInsets.bottom; |
| systemInsets.bottom = 0; |
| } |
| calculateWindowStableInsets(systemInsets, windowRect); |
| windowRect.offsetTo(0, 0); |
| |
| TaskStackLayoutAlgorithm stackLayout = mDummyStackView.getStackAlgorithm(); |
| |
| // Rebind the header bar and draw it for the transition |
| stackLayout.setSystemInsets(systemInsets); |
| if (stack != null) { |
| stackLayout.getTaskStackBounds(windowRect, systemInsets.top, systemInsets.right, |
| mTaskStackBounds); |
| stackLayout.initialize(windowRect, mTaskStackBounds, |
| TaskStackLayoutAlgorithm.StackState.getStackStateForStack(stack)); |
| mDummyStackView.setTasks(stack, false /* allowNotifyStackChanges */); |
| } |
| Rect taskViewBounds = stackLayout.getUntransformedTaskViewBounds(); |
| if (!taskViewBounds.equals(mLastTaskViewBounds)) { |
| mLastTaskViewBounds.set(taskViewBounds); |
| |
| int taskViewWidth = taskViewBounds.width(); |
| synchronized (mHeaderBarLock) { |
| mHeaderBar.measure( |
| View.MeasureSpec.makeMeasureSpec(taskViewWidth, View.MeasureSpec.EXACTLY), |
| View.MeasureSpec.makeMeasureSpec(mTaskBarHeight, View.MeasureSpec.EXACTLY)); |
| mHeaderBar.layout(0, 0, taskViewWidth, mTaskBarHeight); |
| } |
| } |
| } |
| |
| /** |
| * Given the stable insets and the rect for our window, calculates the insets that affect our |
| * window. |
| */ |
| private void calculateWindowStableInsets(Rect inOutInsets, Rect windowRect) { |
| Rect displayRect = Recents.getSystemServices().getDisplayRect(); |
| |
| // Display rect without insets - available app space |
| Rect appRect = new Rect(displayRect); |
| appRect.inset(inOutInsets); |
| |
| // Our window intersected with available app space |
| Rect windowRectWithInsets = new Rect(windowRect); |
| windowRectWithInsets.intersect(appRect); |
| inOutInsets.left = windowRectWithInsets.left - windowRect.left; |
| inOutInsets.top = windowRectWithInsets.top - windowRect.top; |
| inOutInsets.right = windowRect.right - windowRectWithInsets.right; |
| inOutInsets.bottom = windowRect.bottom - windowRectWithInsets.bottom; |
| } |
| |
| /** |
| * Preloads the icon of a task. |
| */ |
| private void preloadIcon(ActivityManager.RunningTaskInfo task) { |
| // Ensure that we load the running task's icon |
| RecentsTaskLoadPlan.Options launchOpts = new RecentsTaskLoadPlan.Options(); |
| launchOpts.runningTaskId = task.id; |
| launchOpts.loadThumbnails = false; |
| launchOpts.onlyLoadForCache = true; |
| Recents.getTaskLoader().loadTasks(mContext, sInstanceLoadPlan, launchOpts); |
| } |
| |
| /** |
| * Caches the header thumbnail used for a window animation asynchronously into |
| * {@link #mThumbnailTransitionBitmapCache}. |
| */ |
| private void preCacheThumbnailTransitionBitmapAsync(ActivityManager.RunningTaskInfo topTask, |
| TaskStack stack, TaskStackView stackView) { |
| preloadIcon(topTask); |
| |
| // Update the header bar if necessary |
| updateHeaderBarLayout(stack); |
| |
| // Update the destination rect |
| final Task toTask = new Task(); |
| final TaskViewTransform toTransform = getThumbnailTransitionTransform(stackView, toTask); |
| ForegroundThread.getHandler().postAtFrontOfQueue(new Runnable() { |
| @Override |
| public void run() { |
| final Bitmap transitionBitmap = drawThumbnailTransitionBitmap(toTask, toTransform); |
| if (transitionBitmap != null) { |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| mThumbnailTransitionBitmapCache = transitionBitmap; |
| mThumbnailTransitionBitmapCacheKey = toTask; |
| } |
| }); |
| } else { |
| Log.e(TAG, "Could not load thumbnail for task: " + toTask + " at transform: " + |
| toTransform); |
| } |
| } |
| }); |
| } |
| |
| /** |
| * Creates the activity options for a unknown state->recents transition. |
| */ |
| protected ActivityOptions getUnknownTransitionActivityOptions() { |
| return ActivityOptions.makeCustomAnimation(mContext, |
| R.anim.recents_from_unknown_enter, |
| R.anim.recents_from_unknown_exit, |
| mHandler, null); |
| } |
| |
| /** |
| * Creates the activity options for a home->recents transition. |
| */ |
| protected ActivityOptions getHomeTransitionActivityOptions() { |
| return ActivityOptions.makeCustomAnimation(mContext, |
| R.anim.recents_from_launcher_enter, |
| R.anim.recents_from_launcher_exit, |
| mHandler, null); |
| } |
| |
| /** |
| * Creates the activity options for an app->recents transition. |
| */ |
| private ActivityOptions getThumbnailTransitionActivityOptions( |
| ActivityManager.RunningTaskInfo topTask, TaskStackView stackView) { |
| if (topTask.stackId == FREEFORM_WORKSPACE_STACK_ID) { |
| ArrayList<AppTransitionAnimationSpec> specs = new ArrayList<>(); |
| ArrayList<Task> tasks = stackView.getStack().getStackTasks(); |
| TaskStackLayoutAlgorithm stackLayout = stackView.getStackAlgorithm(); |
| TaskStackViewScroller stackScroller = stackView.getScroller(); |
| |
| stackView.updateLayoutAlgorithm(true /* boundScroll */); |
| stackView.updateToInitialState(true /* scrollToInitialState */); |
| |
| for (int i = tasks.size() - 1; i >= 0; i--) { |
| Task task = tasks.get(i); |
| if (task.isFreeformTask()) { |
| mTmpTransform = stackLayout.getStackTransformScreenCoordinates(task, |
| stackScroller.getStackScroll(), mTmpTransform, null); |
| Rect toTaskRect = new Rect(); |
| mTmpTransform.rect.round(toTaskRect); |
| Bitmap thumbnail = getThumbnailBitmap(topTask, task, mTmpTransform); |
| specs.add(new AppTransitionAnimationSpec(task.key.id, thumbnail, toTaskRect)); |
| } |
| } |
| AppTransitionAnimationSpec[] specsArray = new AppTransitionAnimationSpec[specs.size()]; |
| specs.toArray(specsArray); |
| return ActivityOptions.makeThumbnailAspectScaleDownAnimation(mDummyStackView, |
| specsArray, mHandler, null, this); |
| } else { |
| // Update the destination rect |
| Task toTask = new Task(); |
| TaskViewTransform toTransform = getThumbnailTransitionTransform(stackView, toTask); |
| RectF toTaskRect = toTransform.rect; |
| Bitmap thumbnail = getThumbnailBitmap(topTask, toTask, toTransform); |
| if (thumbnail != null) { |
| return ActivityOptions.makeThumbnailAspectScaleDownAnimation(mDummyStackView, |
| thumbnail, (int) toTaskRect.left, (int) toTaskRect.top, |
| (int) toTaskRect.width(), (int) toTaskRect.height(), mHandler, null); |
| } |
| // If both the screenshot and thumbnail fails, then just fall back to the default transition |
| return getUnknownTransitionActivityOptions(); |
| } |
| } |
| |
| private Bitmap getThumbnailBitmap(ActivityManager.RunningTaskInfo topTask, Task toTask, |
| TaskViewTransform toTransform) { |
| Bitmap thumbnail; |
| if (mThumbnailTransitionBitmapCacheKey != null |
| && mThumbnailTransitionBitmapCacheKey.key != null |
| && mThumbnailTransitionBitmapCacheKey.key.equals(toTask.key)) { |
| thumbnail = mThumbnailTransitionBitmapCache; |
| mThumbnailTransitionBitmapCacheKey = null; |
| mThumbnailTransitionBitmapCache = null; |
| } else { |
| preloadIcon(topTask); |
| thumbnail = drawThumbnailTransitionBitmap(toTask, toTransform); |
| } |
| return thumbnail; |
| } |
| |
| /** |
| * Returns the transition rect for the given task id. |
| */ |
| private TaskViewTransform getThumbnailTransitionTransform(TaskStackView stackView, |
| Task runningTaskOut) { |
| // Find the running task in the TaskStack |
| TaskStack stack = stackView.getStack(); |
| Task launchTask = stack.getLaunchTarget(); |
| if (launchTask != null) { |
| runningTaskOut.copyFrom(launchTask); |
| } else { |
| // If no task is specified or we can not find the task just use the front most one |
| launchTask = stack.getStackFrontMostTask(true /* includeFreeform */); |
| runningTaskOut.copyFrom(launchTask); |
| } |
| |
| // Get the transform for the running task |
| stackView.updateLayoutAlgorithm(true /* boundScroll */); |
| stackView.updateToInitialState(true /* scrollToInitialState */); |
| stackView.getStackAlgorithm().getStackTransformScreenCoordinates(launchTask, |
| stackView.getScroller().getStackScroll(), mTmpTransform, null); |
| return mTmpTransform; |
| } |
| |
| /** |
| * Draws the header of a task used for the window animation into a bitmap. |
| */ |
| private Bitmap drawThumbnailTransitionBitmap(Task toTask, TaskViewTransform toTransform) { |
| SystemServicesProxy ssp = Recents.getSystemServices(); |
| if (toTransform != null && toTask.key != null) { |
| Bitmap thumbnail; |
| synchronized (mHeaderBarLock) { |
| int toHeaderWidth = (int) toTransform.rect.width(); |
| int toHeaderHeight = (int) (mHeaderBar.getMeasuredHeight() * toTransform.scale); |
| if (toHeaderWidth <= 0 || toHeaderHeight <= 0) { |
| return null; |
| } |
| boolean disabledInSafeMode = !toTask.isSystemApp && ssp.isInSafeMode(); |
| mHeaderBar.onTaskViewSizeChanged((int) toTransform.rect.width(), |
| (int) toTransform.rect.height()); |
| thumbnail = Bitmap.createBitmap(toHeaderWidth, toHeaderHeight, |
| Bitmap.Config.ARGB_8888); |
| if (RecentsDebugFlags.Static.EnableTransitionThumbnailDebugMode) { |
| thumbnail.eraseColor(0xFFff0000); |
| } else { |
| Canvas c = new Canvas(thumbnail); |
| c.scale(toTransform.scale, toTransform.scale); |
| // Workaround for b/27815919, reset the callback so that we do not trigger an |
| // invalidate on the header bar as a result of updating the icon |
| Drawable icon = mHeaderBar.getIconView().getDrawable(); |
| if (icon != null) { |
| icon.setCallback(null); |
| } |
| mHeaderBar.rebindToTask(toTask, false /* touchExplorationEnabled */, |
| disabledInSafeMode); |
| mHeaderBar.setDimAlpha(toTransform.dimAlpha); |
| mHeaderBar.draw(c); |
| c.setBitmap(null); |
| } |
| } |
| return thumbnail.createAshmemBitmap(); |
| } |
| return null; |
| } |
| |
| /** |
| * Shows the recents activity |
| */ |
| protected void startRecentsActivity(ActivityManager.RunningTaskInfo topTask, |
| boolean isTopTaskHome, boolean animate) { |
| RecentsTaskLoader loader = Recents.getTaskLoader(); |
| RecentsActivityLaunchState launchState = Recents.getConfiguration().getLaunchState(); |
| |
| // In the case where alt-tab is triggered, we never get a preloadRecents() call, so we |
| // should always preload the tasks now. If we are dragging in recents, reload them as |
| // the stacks might have changed. |
| if (mLaunchedWhileDocking || mTriggeredFromAltTab ||sInstanceLoadPlan == null) { |
| // Create a new load plan if preloadRecents() was never triggered |
| sInstanceLoadPlan = loader.createLoadPlan(mContext); |
| } |
| if (mLaunchedWhileDocking || mTriggeredFromAltTab || !sInstanceLoadPlan.hasTasks()) { |
| loader.preloadTasks(sInstanceLoadPlan, topTask.id, isTopTaskHome); |
| } |
| |
| TaskStack stack = sInstanceLoadPlan.getTaskStack(); |
| boolean hasRecentTasks = stack.getTaskCount() > 0; |
| boolean useThumbnailTransition = (topTask != null) && !isTopTaskHome && hasRecentTasks; |
| |
| // Update the header bar if necessary |
| updateHeaderBarLayout(stack); |
| |
| // Prepare the dummy stack for the transition |
| TaskStackLayoutAlgorithm.VisibilityReport stackVr = |
| mDummyStackView.computeStackVisibilityReport(); |
| |
| // Update the launch state |
| launchState.launchedFromHome = false; |
| launchState.launchedFromApp = mLaunchedWhileDocking; |
| launchState.launchedViaDockGesture = mLaunchedWhileDocking; |
| launchState.launchedToTaskId = (topTask != null) ? topTask.id : -1; |
| launchState.launchedWithAltTab = mTriggeredFromAltTab; |
| launchState.launchedNumVisibleTasks = stackVr.numVisibleTasks; |
| launchState.launchedNumVisibleThumbnails = stackVr.numVisibleThumbnails; |
| launchState.launchedViaDragGesture = mDraggingInRecents; |
| |
| if (!animate) { |
| startRecentsActivity(ActivityOptions.makeCustomAnimation(mContext, -1, -1)); |
| return; |
| } |
| |
| if (useThumbnailTransition) { |
| launchState.launchedFromApp = true; |
| |
| // Try starting with a thumbnail transition |
| ActivityOptions opts = getThumbnailTransitionActivityOptions(topTask, mDummyStackView); |
| if (opts != null) { |
| startRecentsActivity(opts); |
| } else { |
| // Fall through below to the non-thumbnail transition |
| useThumbnailTransition = false; |
| } |
| } |
| |
| if (!useThumbnailTransition) { |
| launchState.launchedFromHome = true; |
| |
| // If there is no thumbnail transition, but is launching from home into recents, then |
| // use a quick home transition |
| ActivityOptions opts = hasRecentTasks |
| ? getHomeTransitionActivityOptions() |
| : getUnknownTransitionActivityOptions(); |
| startRecentsActivity(opts); |
| } |
| mLastToggleTime = SystemClock.elapsedRealtime(); |
| } |
| |
| /** |
| * Starts the recents activity. |
| */ |
| private void startRecentsActivity(ActivityOptions opts) { |
| Intent intent = new Intent(); |
| intent.setClassName(RECENTS_PACKAGE, RECENTS_ACTIVITY); |
| intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
| | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS |
| | Intent.FLAG_ACTIVITY_TASK_ON_HOME); |
| |
| if (opts != null) { |
| mContext.startActivityAsUser(intent, opts.toBundle(), UserHandle.CURRENT); |
| } else { |
| mContext.startActivityAsUser(intent, UserHandle.CURRENT); |
| } |
| EventBus.getDefault().send(new RecentsActivityStartingEvent()); |
| } |
| |
| /**** OnAnimationFinishedListener Implementation ****/ |
| |
| @Override |
| public void onAnimationFinished() { |
| EventBus.getDefault().post(new EnterRecentsWindowLastAnimationFrameEvent()); |
| } |
| } |