com/android/systemui/shared/system/TaskStackChangeListeners.java - platform/prebuilts/fullsdk/sources/android-30 - Git at Google

 /*
  * Copyright (C) 2017 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.shared.system;

 import android.app.ActivityManager.RunningTaskInfo;
 import android.app.ActivityManager.TaskSnapshot;
 import android.app.ActivityTaskManager;
 import android.app.IActivityManager;
 import android.app.TaskStackListener;
 import android.content.ComponentName;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Looper;
 import android.os.Message;
 import android.os.RemoteException;
 import android.os.Trace;
 import android.util.Log;

 import com.android.internal.os.SomeArgs;
 import com.android.systemui.shared.recents.model.ThumbnailData;

 import java.util.ArrayList;
 import java.util.List;

 /**
  * Tracks all the task stack listeners
  */
 public class TaskStackChangeListeners extends TaskStackListener {

     private static final String TAG = TaskStackChangeListeners.class.getSimpleName();

     /**
      * List of {@link TaskStackChangeListener} registered from {@link #addListener}.
      */
     private final List<TaskStackChangeListener> mTaskStackListeners = new ArrayList<>();
     private final List<TaskStackChangeListener> mTmpListeners = new ArrayList<>();

     private final Handler mHandler;
     private boolean mRegistered;

     public TaskStackChangeListeners(Looper looper) {
         mHandler = new H(looper);
     }

     public void addListener(IActivityManager am, TaskStackChangeListener listener) {
         synchronized (mTaskStackListeners) {
             mTaskStackListeners.add(listener);
         }
         if (!mRegistered) {
             // Register mTaskStackListener to IActivityManager only once if needed.
             try {
                 ActivityTaskManager.getService().registerTaskStackListener(this);
                 mRegistered = true;
             } catch (Exception e) {
                 Log.w(TAG, "Failed to call registerTaskStackListener", e);
             }
         }
     }

     public void removeListener(TaskStackChangeListener listener) {
         boolean isEmpty;
         synchronized (mTaskStackListeners) {
             mTaskStackListeners.remove(listener);
             isEmpty = mTaskStackListeners.isEmpty();
         }
         if (isEmpty && mRegistered) {
             // Unregister mTaskStackListener once we have no more listeners
             try {
                 ActivityTaskManager.getService().unregisterTaskStackListener(this);
                 mRegistered = false;
             } catch (Exception e) {
                 Log.w(TAG, "Failed to call unregisterTaskStackListener", e);
             }
         }
     }

     @Override
     public void onTaskStackChanged() throws RemoteException {
         // Call the task changed callback for the non-ui thread listeners first. Copy to a set of
         // temp listeners so that we don't lock on mTaskStackListeners while calling all the
         // callbacks. This call is always on the same binder thread, so we can just synchronize
         // on the copying of the listener list.
         synchronized (mTaskStackListeners) {
             mTmpListeners.addAll(mTaskStackListeners);
         }
         for (int i = mTmpListeners.size() - 1; i >= 0; i--) {
             mTmpListeners.get(i).onTaskStackChangedBackground();
         }
         mTmpListeners.clear();

         mHandler.removeMessages(H.ON_TASK_STACK_CHANGED);
         mHandler.sendEmptyMessage(H.ON_TASK_STACK_CHANGED);
     }

     @Override
     public void onActivityPinned(String packageName, int userId, int taskId, int stackId)
             throws RemoteException {
         mHandler.removeMessages(H.ON_ACTIVITY_PINNED);
         mHandler.obtainMessage(H.ON_ACTIVITY_PINNED,
                 new PinnedActivityInfo(packageName, userId, taskId, stackId)).sendToTarget();
     }

     @Override
     public void onActivityUnpinned() throws RemoteException {
         mHandler.removeMessages(H.ON_ACTIVITY_UNPINNED);
         mHandler.sendEmptyMessage(H.ON_ACTIVITY_UNPINNED);
     }

     @Override
     public void onActivityRestartAttempt(RunningTaskInfo task, boolean homeTaskVisible,
             boolean clearedTask, boolean wasVisible) throws RemoteException {
         final SomeArgs args = SomeArgs.obtain();
         args.arg1 = task;
         args.argi1 = homeTaskVisible ? 1 : 0;
         args.argi2 = clearedTask ? 1 : 0;
         args.argi3 = wasVisible ? 1 : 0;
         mHandler.removeMessages(H.ON_ACTIVITY_RESTART_ATTEMPT);
         mHandler.obtainMessage(H.ON_ACTIVITY_RESTART_ATTEMPT, args).sendToTarget();
     }

     @Override
     public void onActivityForcedResizable(String packageName, int taskId, int reason)
             throws RemoteException {
         mHandler.obtainMessage(H.ON_ACTIVITY_FORCED_RESIZABLE, taskId, reason, packageName)
                 .sendToTarget();
     }

     @Override
     public void onActivityDismissingDockedStack() throws RemoteException {
         mHandler.sendEmptyMessage(H.ON_ACTIVITY_DISMISSING_DOCKED_STACK);
     }

     @Override
     public void onActivityLaunchOnSecondaryDisplayFailed(RunningTaskInfo taskInfo,
             int requestedDisplayId) throws RemoteException {
         mHandler.obtainMessage(H.ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_FAILED, requestedDisplayId,
                 0 /* unused */,
                 taskInfo).sendToTarget();
     }

     @Override
     public void onActivityLaunchOnSecondaryDisplayRerouted(RunningTaskInfo taskInfo,
             int requestedDisplayId) throws RemoteException {
         mHandler.obtainMessage(H.ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_REROUTED,
                 requestedDisplayId, 0 /* unused */, taskInfo).sendToTarget();
     }

     @Override
     public void onTaskProfileLocked(int taskId, int userId) throws RemoteException {
         mHandler.obtainMessage(H.ON_TASK_PROFILE_LOCKED, taskId, userId).sendToTarget();
     }

     @Override
     public void onTaskSnapshotChanged(int taskId, TaskSnapshot snapshot) throws RemoteException {
         mHandler.obtainMessage(H.ON_TASK_SNAPSHOT_CHANGED, taskId, 0, snapshot).sendToTarget();
     }

     @Override
     public void onTaskCreated(int taskId, ComponentName componentName) throws RemoteException {
         mHandler.obtainMessage(H.ON_TASK_CREATED, taskId, 0, componentName).sendToTarget();
     }

     @Override
     public void onTaskRemoved(int taskId) throws RemoteException {
         mHandler.obtainMessage(H.ON_TASK_REMOVED, taskId, 0).sendToTarget();
     }

     @Override
     public void onTaskMovedToFront(RunningTaskInfo taskInfo)
             throws RemoteException {
         mHandler.obtainMessage(H.ON_TASK_MOVED_TO_FRONT, taskInfo).sendToTarget();
     }

     @Override
     public void onBackPressedOnTaskRoot(RunningTaskInfo taskInfo) throws RemoteException {
         mHandler.obtainMessage(H.ON_BACK_PRESSED_ON_TASK_ROOT, taskInfo).sendToTarget();
     }

     @Override
     public void onActivityRequestedOrientationChanged(int taskId, int requestedOrientation)
             throws RemoteException {
         mHandler.obtainMessage(H.ON_ACTIVITY_REQUESTED_ORIENTATION_CHANGE, taskId,
                 requestedOrientation).sendToTarget();
     }

     @Override
     public void onSizeCompatModeActivityChanged(int displayId, IBinder activityToken)
             throws RemoteException {
         mHandler.obtainMessage(H.ON_SIZE_COMPAT_MODE_ACTIVITY_CHANGED, displayId, 0 /* unused */,
                 activityToken).sendToTarget();
     }

     @Override
     public void onSingleTaskDisplayDrawn(int displayId) throws RemoteException {
         mHandler.obtainMessage(H.ON_SINGLE_TASK_DISPLAY_DRAWN, displayId,
                 0 /* unused */).sendToTarget();
     }

     @Override
     public void onSingleTaskDisplayEmpty(int displayId) throws RemoteException {
         mHandler.obtainMessage(H.ON_SINGLE_TASK_DISPLAY_EMPTY, displayId,
                 0 /* unused */).sendToTarget();
     }

     @Override
     public void onTaskDisplayChanged(int taskId, int newDisplayId) throws RemoteException {
         mHandler.obtainMessage(H.ON_TASK_DISPLAY_CHANGED, taskId, newDisplayId).sendToTarget();
     }

     @Override
     public void onRecentTaskListUpdated() throws RemoteException {
         mHandler.obtainMessage(H.ON_TASK_LIST_UPDATED).sendToTarget();
     }

     @Override
     public void onRecentTaskListFrozenChanged(boolean frozen) {
         mHandler.obtainMessage(H.ON_TASK_LIST_FROZEN_UNFROZEN, frozen ? 1 : 0, 0 /* unused */)
                 .sendToTarget();
     }

     @Override
     public void onTaskDescriptionChanged(RunningTaskInfo taskInfo) {
         mHandler.obtainMessage(H.ON_TASK_DESCRIPTION_CHANGED, taskInfo).sendToTarget();
     }

     private final class H extends Handler {
         private static final int ON_TASK_STACK_CHANGED = 1;
         private static final int ON_TASK_SNAPSHOT_CHANGED = 2;
         private static final int ON_ACTIVITY_PINNED = 3;
         private static final int ON_ACTIVITY_RESTART_ATTEMPT = 4;
         private static final int ON_ACTIVITY_FORCED_RESIZABLE = 6;
         private static final int ON_ACTIVITY_DISMISSING_DOCKED_STACK = 7;
         private static final int ON_TASK_PROFILE_LOCKED = 8;
         private static final int ON_ACTIVITY_UNPINNED = 10;
         private static final int ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_FAILED = 11;
         private static final int ON_TASK_CREATED = 12;
         private static final int ON_TASK_REMOVED = 13;
         private static final int ON_TASK_MOVED_TO_FRONT = 14;
         private static final int ON_ACTIVITY_REQUESTED_ORIENTATION_CHANGE = 15;
         private static final int ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_REROUTED = 16;
         private static final int ON_SIZE_COMPAT_MODE_ACTIVITY_CHANGED = 17;
         private static final int ON_BACK_PRESSED_ON_TASK_ROOT = 18;
         private static final int ON_SINGLE_TASK_DISPLAY_DRAWN = 19;
         private static final int ON_TASK_DISPLAY_CHANGED = 20;
         private static final int ON_TASK_LIST_UPDATED = 21;
         private static final int ON_SINGLE_TASK_DISPLAY_EMPTY = 22;
         private static final int ON_TASK_LIST_FROZEN_UNFROZEN = 23;
         private static final int ON_TASK_DESCRIPTION_CHANGED = 24;


         public H(Looper looper) {
             super(looper);
         }

         @Override
         public void handleMessage(Message msg) {
             synchronized (mTaskStackListeners) {
                 switch (msg.what) {
                     case ON_TASK_STACK_CHANGED: {
                         Trace.beginSection("onTaskStackChanged");
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onTaskStackChanged();
                         }
                         Trace.endSection();
                         break;
                     }
                     case ON_TASK_SNAPSHOT_CHANGED: {
                         Trace.beginSection("onTaskSnapshotChanged");
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onTaskSnapshotChanged(msg.arg1,
                                     new ThumbnailData((TaskSnapshot) msg.obj));
                         }
                         Trace.endSection();
                         break;
                     }
                     case ON_ACTIVITY_PINNED: {
                         final PinnedActivityInfo info = (PinnedActivityInfo) msg.obj;
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onActivityPinned(
                                     info.mPackageName, info.mUserId, info.mTaskId, info.mStackId);
                         }
                         break;
                     }
                     case ON_ACTIVITY_UNPINNED: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onActivityUnpinned();
                         }
                         break;
                     }
                     case ON_ACTIVITY_RESTART_ATTEMPT: {
                         final SomeArgs args = (SomeArgs) msg.obj;
                         final RunningTaskInfo task = (RunningTaskInfo) args.arg1;
                         final boolean homeTaskVisible = args.argi1 != 0;
                         final boolean clearedTask = args.argi2 != 0;
                         final boolean wasVisible = args.argi3 != 0;
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onActivityRestartAttempt(task,
                                     homeTaskVisible, clearedTask, wasVisible);
                         }
                         break;
                     }
                     case ON_ACTIVITY_FORCED_RESIZABLE: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onActivityForcedResizable(
                                     (String) msg.obj, msg.arg1, msg.arg2);
                         }
                         break;
                     }
                     case ON_ACTIVITY_DISMISSING_DOCKED_STACK: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onActivityDismissingDockedStack();
                         }
                         break;
                     }
                     case ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_FAILED: {
                         final RunningTaskInfo info = (RunningTaskInfo) msg.obj;
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i)
                                     .onActivityLaunchOnSecondaryDisplayFailed(info);
                         }
                         break;
                     }
                     case ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_REROUTED: {
                         final RunningTaskInfo info = (RunningTaskInfo) msg.obj;
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i)
                                     .onActivityLaunchOnSecondaryDisplayRerouted(info);
                         }
                         break;
                     }
                     case ON_TASK_PROFILE_LOCKED: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onTaskProfileLocked(msg.arg1, msg.arg2);
                         }
                         break;
                     }
                     case ON_TASK_CREATED: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onTaskCreated(msg.arg1,
                                     (ComponentName) msg.obj);
                         }
                         break;
                     }
                     case ON_TASK_REMOVED: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onTaskRemoved(msg.arg1);
                         }
                         break;
                     }
                     case ON_TASK_MOVED_TO_FRONT: {
                         final RunningTaskInfo info = (RunningTaskInfo) msg.obj;
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onTaskMovedToFront(info);
                         }
                         break;
                     }
                     case ON_ACTIVITY_REQUESTED_ORIENTATION_CHANGE: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i)
                                     .onActivityRequestedOrientationChanged(msg.arg1, msg.arg2);
                         }
                         break;
                     }
                     case ON_SIZE_COMPAT_MODE_ACTIVITY_CHANGED: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onSizeCompatModeActivityChanged(
                                     msg.arg1, (IBinder) msg.obj);
                         }
                         break;
                     }
                     case ON_BACK_PRESSED_ON_TASK_ROOT: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onBackPressedOnTaskRoot(
                                     (RunningTaskInfo) msg.obj);
                         }
                         break;
                     }
                     case ON_SINGLE_TASK_DISPLAY_DRAWN: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onSingleTaskDisplayDrawn(msg.arg1);
                         }
                         break;
                     }
                     case ON_SINGLE_TASK_DISPLAY_EMPTY: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onSingleTaskDisplayEmpty(
                                     msg.arg1);
                         }
                         break;
                     }
                     case ON_TASK_DISPLAY_CHANGED: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onTaskDisplayChanged(msg.arg1, msg.arg2);
                         }
                         break;
                     }
                     case ON_TASK_LIST_UPDATED: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onRecentTaskListUpdated();
                         }
                         break;
                     }
                     case ON_TASK_LIST_FROZEN_UNFROZEN: {
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onRecentTaskListFrozenChanged(msg.arg1 != 0);
                         }
                         break;
                     }
                     case ON_TASK_DESCRIPTION_CHANGED: {
                         final RunningTaskInfo info = (RunningTaskInfo) msg.obj;
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
                             mTaskStackListeners.get(i).onTaskDescriptionChanged(info);
                         }
                         break;
                     }
                 }
             }
             if (msg.obj instanceof SomeArgs) {
                 ((SomeArgs) msg.obj).recycle();
             }
         }
     }

     private static class PinnedActivityInfo {
         final String mPackageName;
         final int mUserId;
         final int mTaskId;
         final int mStackId;

         PinnedActivityInfo(String packageName, int userId, int taskId, int stackId) {
             mPackageName = packageName;
             mUserId = userId;
             mTaskId = taskId;
             mStackId = stackId;
         }
     }
 }
	/*
	* Copyright (C) 2017 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.shared.system;

	import android.app.ActivityManager.RunningTaskInfo;
	import android.app.ActivityManager.TaskSnapshot;
	import android.app.ActivityTaskManager;
	import android.app.IActivityManager;
	import android.app.TaskStackListener;
	import android.content.ComponentName;
	import android.os.Handler;
	import android.os.IBinder;
	import android.os.Looper;
	import android.os.Message;
	import android.os.RemoteException;
	import android.os.Trace;
	import android.util.Log;

	import com.android.internal.os.SomeArgs;
	import com.android.systemui.shared.recents.model.ThumbnailData;

	import java.util.ArrayList;
	import java.util.List;

	/**
	* Tracks all the task stack listeners
	*/
	public class TaskStackChangeListeners extends TaskStackListener {

	private static final String TAG = TaskStackChangeListeners.class.getSimpleName();

	/**
	* List of {@link TaskStackChangeListener} registered from {@link #addListener}.
	*/
	private final List<TaskStackChangeListener> mTaskStackListeners = new ArrayList<>();
	private final List<TaskStackChangeListener> mTmpListeners = new ArrayList<>();

	private final Handler mHandler;
	private boolean mRegistered;

	public TaskStackChangeListeners(Looper looper) {
	mHandler = new H(looper);
	}

	public void addListener(IActivityManager am, TaskStackChangeListener listener) {
	synchronized (mTaskStackListeners) {
	mTaskStackListeners.add(listener);
	}
	if (!mRegistered) {
	// Register mTaskStackListener to IActivityManager only once if needed.
	try {
	ActivityTaskManager.getService().registerTaskStackListener(this);
	mRegistered = true;
	} catch (Exception e) {
	Log.w(TAG, "Failed to call registerTaskStackListener", e);
	}
	}
	}

	public void removeListener(TaskStackChangeListener listener) {
	boolean isEmpty;
	synchronized (mTaskStackListeners) {
	mTaskStackListeners.remove(listener);
	isEmpty = mTaskStackListeners.isEmpty();
	}
	if (isEmpty && mRegistered) {
	// Unregister mTaskStackListener once we have no more listeners
	try {
	ActivityTaskManager.getService().unregisterTaskStackListener(this);
	mRegistered = false;
	} catch (Exception e) {
	Log.w(TAG, "Failed to call unregisterTaskStackListener", e);
	}
	}
	}

	@Override
	public void onTaskStackChanged() throws RemoteException {
	// Call the task changed callback for the non-ui thread listeners first. Copy to a set of
	// temp listeners so that we don't lock on mTaskStackListeners while calling all the
	// callbacks. This call is always on the same binder thread, so we can just synchronize
	// on the copying of the listener list.
	synchronized (mTaskStackListeners) {
	mTmpListeners.addAll(mTaskStackListeners);
	}
	for (int i = mTmpListeners.size() - 1; i >= 0; i--) {
	mTmpListeners.get(i).onTaskStackChangedBackground();
	}
	mTmpListeners.clear();

	mHandler.removeMessages(H.ON_TASK_STACK_CHANGED);
	mHandler.sendEmptyMessage(H.ON_TASK_STACK_CHANGED);
	}

	@Override
	public void onActivityPinned(String packageName, int userId, int taskId, int stackId)
	throws RemoteException {
	mHandler.removeMessages(H.ON_ACTIVITY_PINNED);
	mHandler.obtainMessage(H.ON_ACTIVITY_PINNED,
	new PinnedActivityInfo(packageName, userId, taskId, stackId)).sendToTarget();
	}

	@Override
	public void onActivityUnpinned() throws RemoteException {
	mHandler.removeMessages(H.ON_ACTIVITY_UNPINNED);
	mHandler.sendEmptyMessage(H.ON_ACTIVITY_UNPINNED);
	}

	@Override
	public void onActivityRestartAttempt(RunningTaskInfo task, boolean homeTaskVisible,
	boolean clearedTask, boolean wasVisible) throws RemoteException {
	final SomeArgs args = SomeArgs.obtain();
	args.arg1 = task;
	args.argi1 = homeTaskVisible ? 1 : 0;
	args.argi2 = clearedTask ? 1 : 0;
	args.argi3 = wasVisible ? 1 : 0;
	mHandler.removeMessages(H.ON_ACTIVITY_RESTART_ATTEMPT);
	mHandler.obtainMessage(H.ON_ACTIVITY_RESTART_ATTEMPT, args).sendToTarget();
	}

	@Override
	public void onActivityForcedResizable(String packageName, int taskId, int reason)
	throws RemoteException {
	mHandler.obtainMessage(H.ON_ACTIVITY_FORCED_RESIZABLE, taskId, reason, packageName)
	.sendToTarget();
	}

	@Override
	public void onActivityDismissingDockedStack() throws RemoteException {
	mHandler.sendEmptyMessage(H.ON_ACTIVITY_DISMISSING_DOCKED_STACK);
	}

	@Override
	public void onActivityLaunchOnSecondaryDisplayFailed(RunningTaskInfo taskInfo,
	int requestedDisplayId) throws RemoteException {
	mHandler.obtainMessage(H.ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_FAILED, requestedDisplayId,
	0 /* unused */,
	taskInfo).sendToTarget();
	}

	@Override
	public void onActivityLaunchOnSecondaryDisplayRerouted(RunningTaskInfo taskInfo,
	int requestedDisplayId) throws RemoteException {
	mHandler.obtainMessage(H.ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_REROUTED,
	requestedDisplayId, 0 /* unused */, taskInfo).sendToTarget();
	}

	@Override
	public void onTaskProfileLocked(int taskId, int userId) throws RemoteException {
	mHandler.obtainMessage(H.ON_TASK_PROFILE_LOCKED, taskId, userId).sendToTarget();
	}

	@Override
	public void onTaskSnapshotChanged(int taskId, TaskSnapshot snapshot) throws RemoteException {
	mHandler.obtainMessage(H.ON_TASK_SNAPSHOT_CHANGED, taskId, 0, snapshot).sendToTarget();
	}

	@Override
	public void onTaskCreated(int taskId, ComponentName componentName) throws RemoteException {
	mHandler.obtainMessage(H.ON_TASK_CREATED, taskId, 0, componentName).sendToTarget();
	}

	@Override
	public void onTaskRemoved(int taskId) throws RemoteException {
	mHandler.obtainMessage(H.ON_TASK_REMOVED, taskId, 0).sendToTarget();
	}

	@Override
	public void onTaskMovedToFront(RunningTaskInfo taskInfo)
	throws RemoteException {
	mHandler.obtainMessage(H.ON_TASK_MOVED_TO_FRONT, taskInfo).sendToTarget();
	}

	@Override
	public void onBackPressedOnTaskRoot(RunningTaskInfo taskInfo) throws RemoteException {
	mHandler.obtainMessage(H.ON_BACK_PRESSED_ON_TASK_ROOT, taskInfo).sendToTarget();
	}

	@Override
	public void onActivityRequestedOrientationChanged(int taskId, int requestedOrientation)
	throws RemoteException {
	mHandler.obtainMessage(H.ON_ACTIVITY_REQUESTED_ORIENTATION_CHANGE, taskId,
	requestedOrientation).sendToTarget();
	}

	@Override
	public void onSizeCompatModeActivityChanged(int displayId, IBinder activityToken)
	throws RemoteException {
	mHandler.obtainMessage(H.ON_SIZE_COMPAT_MODE_ACTIVITY_CHANGED, displayId, 0 /* unused */,
	activityToken).sendToTarget();
	}

	@Override
	public void onSingleTaskDisplayDrawn(int displayId) throws RemoteException {
	mHandler.obtainMessage(H.ON_SINGLE_TASK_DISPLAY_DRAWN, displayId,
	0 /* unused */).sendToTarget();
	}

	@Override
	public void onSingleTaskDisplayEmpty(int displayId) throws RemoteException {
	mHandler.obtainMessage(H.ON_SINGLE_TASK_DISPLAY_EMPTY, displayId,
	0 /* unused */).sendToTarget();
	}

	@Override
	public void onTaskDisplayChanged(int taskId, int newDisplayId) throws RemoteException {
	mHandler.obtainMessage(H.ON_TASK_DISPLAY_CHANGED, taskId, newDisplayId).sendToTarget();
	}

	@Override
	public void onRecentTaskListUpdated() throws RemoteException {
	mHandler.obtainMessage(H.ON_TASK_LIST_UPDATED).sendToTarget();
	}

	@Override
	public void onRecentTaskListFrozenChanged(boolean frozen) {
	mHandler.obtainMessage(H.ON_TASK_LIST_FROZEN_UNFROZEN, frozen ? 1 : 0, 0 /* unused */)
	.sendToTarget();
	}

	@Override
	public void onTaskDescriptionChanged(RunningTaskInfo taskInfo) {
	mHandler.obtainMessage(H.ON_TASK_DESCRIPTION_CHANGED, taskInfo).sendToTarget();
	}

	private final class H extends Handler {
	private static final int ON_TASK_STACK_CHANGED = 1;
	private static final int ON_TASK_SNAPSHOT_CHANGED = 2;
	private static final int ON_ACTIVITY_PINNED = 3;
	private static final int ON_ACTIVITY_RESTART_ATTEMPT = 4;
	private static final int ON_ACTIVITY_FORCED_RESIZABLE = 6;
	private static final int ON_ACTIVITY_DISMISSING_DOCKED_STACK = 7;
	private static final int ON_TASK_PROFILE_LOCKED = 8;
	private static final int ON_ACTIVITY_UNPINNED = 10;
	private static final int ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_FAILED = 11;
	private static final int ON_TASK_CREATED = 12;
	private static final int ON_TASK_REMOVED = 13;
	private static final int ON_TASK_MOVED_TO_FRONT = 14;
	private static final int ON_ACTIVITY_REQUESTED_ORIENTATION_CHANGE = 15;
	private static final int ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_REROUTED = 16;
	private static final int ON_SIZE_COMPAT_MODE_ACTIVITY_CHANGED = 17;
	private static final int ON_BACK_PRESSED_ON_TASK_ROOT = 18;
	private static final int ON_SINGLE_TASK_DISPLAY_DRAWN = 19;
	private static final int ON_TASK_DISPLAY_CHANGED = 20;
	private static final int ON_TASK_LIST_UPDATED = 21;
	private static final int ON_SINGLE_TASK_DISPLAY_EMPTY = 22;
	private static final int ON_TASK_LIST_FROZEN_UNFROZEN = 23;
	private static final int ON_TASK_DESCRIPTION_CHANGED = 24;


	public H(Looper looper) {
	super(looper);
	}

	@Override
	public void handleMessage(Message msg) {
	synchronized (mTaskStackListeners) {
	switch (msg.what) {
	case ON_TASK_STACK_CHANGED: {
	Trace.beginSection("onTaskStackChanged");
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onTaskStackChanged();
	}
	Trace.endSection();
	break;
	}
	case ON_TASK_SNAPSHOT_CHANGED: {
	Trace.beginSection("onTaskSnapshotChanged");
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onTaskSnapshotChanged(msg.arg1,
	new ThumbnailData((TaskSnapshot) msg.obj));
	}
	Trace.endSection();
	break;
	}
	case ON_ACTIVITY_PINNED: {
	final PinnedActivityInfo info = (PinnedActivityInfo) msg.obj;
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onActivityPinned(
	info.mPackageName, info.mUserId, info.mTaskId, info.mStackId);
	}
	break;
	}
	case ON_ACTIVITY_UNPINNED: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onActivityUnpinned();
	}
	break;
	}
	case ON_ACTIVITY_RESTART_ATTEMPT: {
	final SomeArgs args = (SomeArgs) msg.obj;
	final RunningTaskInfo task = (RunningTaskInfo) args.arg1;
	final boolean homeTaskVisible = args.argi1 != 0;
	final boolean clearedTask = args.argi2 != 0;
	final boolean wasVisible = args.argi3 != 0;
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onActivityRestartAttempt(task,
	homeTaskVisible, clearedTask, wasVisible);
	}
	break;
	}
	case ON_ACTIVITY_FORCED_RESIZABLE: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onActivityForcedResizable(
	(String) msg.obj, msg.arg1, msg.arg2);
	}
	break;
	}
	case ON_ACTIVITY_DISMISSING_DOCKED_STACK: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onActivityDismissingDockedStack();
	}
	break;
	}
	case ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_FAILED: {
	final RunningTaskInfo info = (RunningTaskInfo) msg.obj;
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i)
	.onActivityLaunchOnSecondaryDisplayFailed(info);
	}
	break;
	}
	case ON_ACTIVITY_LAUNCH_ON_SECONDARY_DISPLAY_REROUTED: {
	final RunningTaskInfo info = (RunningTaskInfo) msg.obj;
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i)
	.onActivityLaunchOnSecondaryDisplayRerouted(info);
	}
	break;
	}
	case ON_TASK_PROFILE_LOCKED: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onTaskProfileLocked(msg.arg1, msg.arg2);
	}
	break;
	}
	case ON_TASK_CREATED: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onTaskCreated(msg.arg1,
	(ComponentName) msg.obj);
	}
	break;
	}
	case ON_TASK_REMOVED: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onTaskRemoved(msg.arg1);
	}
	break;
	}
	case ON_TASK_MOVED_TO_FRONT: {
	final RunningTaskInfo info = (RunningTaskInfo) msg.obj;
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onTaskMovedToFront(info);
	}
	break;
	}
	case ON_ACTIVITY_REQUESTED_ORIENTATION_CHANGE: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i)
	.onActivityRequestedOrientationChanged(msg.arg1, msg.arg2);
	}
	break;
	}
	case ON_SIZE_COMPAT_MODE_ACTIVITY_CHANGED: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onSizeCompatModeActivityChanged(
	msg.arg1, (IBinder) msg.obj);
	}
	break;
	}
	case ON_BACK_PRESSED_ON_TASK_ROOT: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onBackPressedOnTaskRoot(
	(RunningTaskInfo) msg.obj);
	}
	break;
	}
	case ON_SINGLE_TASK_DISPLAY_DRAWN: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onSingleTaskDisplayDrawn(msg.arg1);
	}
	break;
	}
	case ON_SINGLE_TASK_DISPLAY_EMPTY: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onSingleTaskDisplayEmpty(
	msg.arg1);
	}
	break;
	}
	case ON_TASK_DISPLAY_CHANGED: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onTaskDisplayChanged(msg.arg1, msg.arg2);
	}
	break;
	}
	case ON_TASK_LIST_UPDATED: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onRecentTaskListUpdated();
	}
	break;
	}
	case ON_TASK_LIST_FROZEN_UNFROZEN: {
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onRecentTaskListFrozenChanged(msg.arg1 != 0);
	}
	break;
	}
	case ON_TASK_DESCRIPTION_CHANGED: {
	final RunningTaskInfo info = (RunningTaskInfo) msg.obj;
	for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
	mTaskStackListeners.get(i).onTaskDescriptionChanged(info);
	}
	break;
	}
	}
	}
	if (msg.obj instanceof SomeArgs) {
	((SomeArgs) msg.obj).recycle();
	}
	}
	}

	private static class PinnedActivityInfo {
	final String mPackageName;
	final int mUserId;
	final int mTaskId;
	final int mStackId;

	PinnedActivityInfo(String packageName, int userId, int taskId, int stackId) {
	mPackageName = packageName;
	mUserId = userId;
	mTaskId = taskId;
	mStackId = stackId;
	}
	}
	}