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/*
* Copyright (C) 2018 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.am;
import static android.app.ActivityManager.StackId.INVALID_STACK_ID;
import static android.app.WindowConfiguration.ACTIVITY_TYPE_HOME;
import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
import static android.content.Intent.FLAG_ACTIVITY_NO_ANIMATION;
import static android.view.WindowManager.TRANSIT_NONE;
import static com.android.server.am.ActivityStackSupervisor.PRESERVE_WINDOWS;
import android.app.ActivityOptions;
import android.content.ComponentName;
import android.content.Intent;
import android.os.Handler;
import android.view.IRecentsAnimationRunner;
import com.android.server.wm.RecentsAnimationController.RecentsAnimationCallbacks;
import com.android.server.wm.WindowManagerService;
/**
* Manages the recents animation, including the reordering of the stacks for the transition and
* cleanup. See {@link com.android.server.wm.RecentsAnimationController}.
*/
class RecentsAnimation implements RecentsAnimationCallbacks {
private static final String TAG = RecentsAnimation.class.getSimpleName();
private static final int RECENTS_ANIMATION_TIMEOUT = 10 * 1000;
private final ActivityManagerService mService;
private final ActivityStackSupervisor mStackSupervisor;
private final ActivityStartController mActivityStartController;
private final WindowManagerService mWindowManager;
private final UserController mUserController;
private final Handler mHandler;
private final Runnable mCancelAnimationRunnable;
// The stack to restore the home stack behind when the animation is finished
private ActivityStack mRestoreHomeBehindStack;
RecentsAnimation(ActivityManagerService am, ActivityStackSupervisor stackSupervisor,
ActivityStartController activityStartController, WindowManagerService wm,
UserController userController) {
mService = am;
mStackSupervisor = stackSupervisor;
mActivityStartController = activityStartController;
mHandler = new Handler(mStackSupervisor.mLooper);
mWindowManager = wm;
mUserController = userController;
mCancelAnimationRunnable = () -> {
// The caller has not finished the animation in a predefined amount of time, so
// force-cancel the animation
mWindowManager.cancelRecentsAnimation();
};
}
void startRecentsActivity(Intent intent, IRecentsAnimationRunner recentsAnimationRunner,
ComponentName recentsComponent, int recentsUid) {
// Cancel the previous recents animation if necessary
mWindowManager.cancelRecentsAnimation();
final boolean hasExistingHomeActivity = mStackSupervisor.getHomeActivity() != null;
if (!hasExistingHomeActivity) {
// No home activity
final ActivityOptions opts = ActivityOptions.makeBasic();
opts.setLaunchActivityType(ACTIVITY_TYPE_HOME);
opts.setAvoidMoveToFront();
intent.addFlags(FLAG_ACTIVITY_NEW_TASK | FLAG_ACTIVITY_NO_ANIMATION);
mActivityStartController.obtainStarter(intent, "startRecentsActivity_noHomeActivity")
.setCallingUid(recentsUid)
.setCallingPackage(recentsComponent.getPackageName())
.setActivityOptions(SafeActivityOptions.fromBundle(opts.toBundle()))
.setMayWait(mUserController.getCurrentUserId())
.execute();
mWindowManager.prepareAppTransition(TRANSIT_NONE, false);
// TODO: Maybe wait for app to draw in this particular case?
}
final ActivityRecord homeActivity = mStackSupervisor.getHomeActivity();
final ActivityDisplay display = homeActivity.getDisplay();
// Save the initial position of the home activity stack to be restored to after the
// animation completes
mRestoreHomeBehindStack = hasExistingHomeActivity
? display.getStackAboveHome()
: null;
// Move the home activity into place for the animation
display.moveHomeStackBehindBottomMostVisibleStack();
// Mark the home activity as launch-behind to bump its visibility for the
// duration of the gesture that is driven by the recents component
homeActivity.mLaunchTaskBehind = true;
// Fetch all the surface controls and pass them to the client to get the animation
// started
mWindowManager.initializeRecentsAnimation(recentsAnimationRunner, this, display.mDisplayId);
// If we updated the launch-behind state, update the visibility of the activities after we
// fetch the visible tasks to be controlled by the animation
mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, PRESERVE_WINDOWS);
// Post a timeout for the animation
mHandler.postDelayed(mCancelAnimationRunnable, RECENTS_ANIMATION_TIMEOUT);
}
@Override
public void onAnimationFinished(boolean moveHomeToTop) {
mHandler.removeCallbacks(mCancelAnimationRunnable);
synchronized (mService) {
if (mWindowManager.getRecentsAnimationController() == null) return;
mWindowManager.inSurfaceTransaction(() -> {
mWindowManager.cleanupRecentsAnimation();
// Move the home stack to the front
final ActivityRecord homeActivity = mStackSupervisor.getHomeActivity();
if (homeActivity == null) {
return;
}
// Restore the launched-behind state
homeActivity.mLaunchTaskBehind = false;
if (moveHomeToTop) {
// Bring the home stack to the front
final ActivityStack homeStack = homeActivity.getStack();
homeStack.mNoAnimActivities.add(homeActivity);
homeStack.moveToFront("RecentsAnimation.onAnimationFinished()");
} else {
// Restore the home stack to its previous position
final ActivityDisplay display = homeActivity.getDisplay();
display.moveHomeStackBehindStack(mRestoreHomeBehindStack);
}
mWindowManager.prepareAppTransition(TRANSIT_NONE, false);
mStackSupervisor.ensureActivitiesVisibleLocked(null, 0, false);
mStackSupervisor.resumeFocusedStackTopActivityLocked();
});
}
}
}
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