| /* |
| * Copyright (C) 2020 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 android.widget; |
| |
| import android.content.Context; |
| import android.content.res.Configuration; |
| import android.content.res.Resources; |
| import android.graphics.PixelFormat; |
| import android.os.IBinder; |
| import android.view.Gravity; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.WindowManager; |
| import android.view.accessibility.AccessibilityEvent; |
| import android.view.accessibility.AccessibilityManager; |
| |
| import com.android.internal.R; |
| import com.android.internal.util.ArrayUtils; |
| |
| /** |
| * Class responsible for toast presentation inside app's process and in system UI. |
| * |
| * @hide |
| */ |
| public class ToastPresenter { |
| private static final long SHORT_DURATION_TIMEOUT = 4000; |
| private static final long LONG_DURATION_TIMEOUT = 7000; |
| |
| private final Context mContext; |
| private final Resources mResources; |
| private final AccessibilityManager mAccessibilityManager; |
| |
| public ToastPresenter(Context context, AccessibilityManager accessibilityManager) { |
| mContext = context; |
| mResources = context.getResources(); |
| mAccessibilityManager = accessibilityManager; |
| } |
| |
| /** |
| * Initializes {@code params} with default values for toasts. |
| */ |
| public void startLayoutParams(WindowManager.LayoutParams params, String packageName) { |
| params.height = WindowManager.LayoutParams.WRAP_CONTENT; |
| params.width = WindowManager.LayoutParams.WRAP_CONTENT; |
| params.format = PixelFormat.TRANSLUCENT; |
| params.windowAnimations = R.style.Animation_Toast; |
| params.type = WindowManager.LayoutParams.TYPE_TOAST; |
| params.setFitInsetsIgnoringVisibility(true); |
| params.setTitle("Toast"); |
| params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
| | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
| | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE; |
| setShowForAllUsersIfApplicable(params, packageName); |
| } |
| |
| /** |
| * Customizes {@code params} according to other parameters, ready to be passed to {@link |
| * WindowManager#addView(View, ViewGroup.LayoutParams)}. |
| */ |
| public void adjustLayoutParams(WindowManager.LayoutParams params, IBinder windowToken, |
| int duration, int gravity, int xOffset, int yOffset, float horizontalMargin, |
| float verticalMargin) { |
| Configuration config = mResources.getConfiguration(); |
| int absGravity = Gravity.getAbsoluteGravity(gravity, config.getLayoutDirection()); |
| params.gravity = absGravity; |
| if ((absGravity & Gravity.HORIZONTAL_GRAVITY_MASK) == Gravity.FILL_HORIZONTAL) { |
| params.horizontalWeight = 1.0f; |
| } |
| if ((absGravity & Gravity.VERTICAL_GRAVITY_MASK) == Gravity.FILL_VERTICAL) { |
| params.verticalWeight = 1.0f; |
| } |
| params.x = xOffset; |
| params.y = yOffset; |
| params.horizontalMargin = horizontalMargin; |
| params.verticalMargin = verticalMargin; |
| params.packageName = mContext.getPackageName(); |
| params.hideTimeoutMilliseconds = |
| (duration == Toast.LENGTH_LONG) ? LONG_DURATION_TIMEOUT : SHORT_DURATION_TIMEOUT; |
| params.token = windowToken; |
| } |
| |
| /** |
| * Sets {@link WindowManager.LayoutParams#SYSTEM_FLAG_SHOW_FOR_ALL_USERS} flag if {@code |
| * packageName} is a cross-user package. |
| * |
| * Implementation note: |
| * This code is safe to be executed in SystemUI and the app's process: |
| * <li>SystemUI: It's running on a trusted domain so apps can't tamper with it. SystemUI |
| * has the permission INTERNAL_SYSTEM_WINDOW needed by the flag, so SystemUI can add |
| * the flag on behalf of those packages, which all contain INTERNAL_SYSTEM_WINDOW |
| * permission. |
| * <li>App: The flag being added is protected behind INTERNAL_SYSTEM_WINDOW permission |
| * and any app can already add that flag via getWindowParams() if it has that |
| * permission, so we are just doing this automatically for cross-user packages. |
| */ |
| private void setShowForAllUsersIfApplicable(WindowManager.LayoutParams params, |
| String packageName) { |
| if (isCrossUserPackage(packageName)) { |
| params.privateFlags = WindowManager.LayoutParams.SYSTEM_FLAG_SHOW_FOR_ALL_USERS; |
| } |
| } |
| |
| private boolean isCrossUserPackage(String packageName) { |
| String[] packages = mResources.getStringArray(R.array.config_toastCrossUserPackages); |
| return ArrayUtils.contains(packages, packageName); |
| } |
| |
| /** |
| * Returns the default text toast view for message {@code text}. |
| */ |
| public View getTextToastView(CharSequence text) { |
| View view = LayoutInflater.from(mContext).inflate( |
| R.layout.transient_notification, null); |
| TextView textView = view.findViewById(com.android.internal.R.id.message); |
| textView.setText(text); |
| return view; |
| } |
| |
| /** |
| * Sends {@link AccessibilityEvent#TYPE_NOTIFICATION_STATE_CHANGED} event if accessibility is |
| * enabled. |
| */ |
| public void trySendAccessibilityEvent(View view, String packageName) { |
| if (!mAccessibilityManager.isEnabled()) { |
| return; |
| } |
| AccessibilityEvent event = AccessibilityEvent.obtain( |
| AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED); |
| event.setClassName(Toast.class.getName()); |
| event.setPackageName(packageName); |
| view.dispatchPopulateAccessibilityEvent(event); |
| mAccessibilityManager.sendAccessibilityEvent(event); |
| } |
| } |