commit 23aa7b11047439c404d19a9b6cc20e73a41488b1
author Winson Chung <winsonc@google.com> Thu Feb 01 11:41:43 2018 -0800
committer Winson Chung <winsonc@google.com> Wed Feb 14 01:33:39 2018 +0000
tree 44217016e519cf64fdacefc95f9476df2cb38388
parent 759148c6a79e062f22b3ca174c5a5b2c82c19999

Update the cache with the snapshot requested during recents animation

- When a screenshot is requested by the recents animation runner, update
  the task snapshot cache to ensure that the same snapshot is used for the
  next starting animation. In doing so, we also need to prevent the default
  logic from taking a new snapshot when the app is hidden at the end of the
  recents animation.

Bug: 70180552
Test: atest TaskSnapshotControllerTest
Change-Id: Ib081ba324587b0719edb370e3c253c86f5e6c1b6

services/core/java/com/android/server/wm/RecentsAnimationController.java

diff --git a/services/core/java/com/android/server/wm/RecentsAnimationController.java b/services/core/java/com/android/server/wm/RecentsAnimationController.java
index 6c3beaf..78dd580 100644
--- a/services/core/java/com/android/server/wm/RecentsAnimationController.java
+++ b/services/core/java/com/android/server/wm/RecentsAnimationController.java
@@ -24,15 +24,15 @@
 import static com.android.server.wm.WindowManagerDebugConfig.TAG_WITH_CLASS_NAME;
 import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM;
 
-import android.app.ActivityManager;
 import android.app.ActivityManager.TaskSnapshot;
 import android.app.WindowConfiguration;
-import android.graphics.GraphicBuffer;
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.os.Binder;
+import android.os.IBinder;
 import android.os.RemoteException;
 import android.os.SystemClock;
+import android.util.ArraySet;
 import android.util.Log;
 import android.util.Slog;
 import android.view.IRecentsAnimationController;
@@ -41,6 +41,7 @@
 import android.view.SurfaceControl;
 import android.view.SurfaceControl.Transaction;
 import com.android.server.wm.SurfaceAnimator.OnAnimationFinishedCallback;
+import com.google.android.collect.Sets;
 import java.io.PrintWriter;
 import java.util.ArrayList;
 
@@ -99,17 +100,13 @@
                         final TaskAnimationAdapter adapter = mPendingAnimations.get(i);
                         final Task task = adapter.mTask;
                         if (task.mTaskId == taskId) {
-                            // TODO: Save this screenshot as the task snapshot?
-                            final Rect taskFrame = new Rect();
-                            task.getBounds(taskFrame);
-                            final GraphicBuffer buffer = SurfaceControl.captureLayers(
-                                    task.getSurfaceControl().getHandle(), taskFrame, 1f);
-                            final AppWindowToken topChild = task.getTopChild();
-                            final WindowState mainWindow = topChild.findMainWindow();
-                            return new TaskSnapshot(buffer, topChild.getConfiguration().orientation,
-                                    mainWindow.mContentInsets,
-                                    ActivityManager.isLowRamDeviceStatic() /* reduced */,
-                                    1.0f /* scale */);
+                            final TaskSnapshotController snapshotController =
+                                    mService.mTaskSnapshotController;
+                            final ArraySet<Task> tasks = Sets.newArraySet(task);
+                            snapshotController.snapshotTasks(tasks);
+                            snapshotController.addSkipClosingAppSnapshotTasks(tasks);
+                            return snapshotController.getSnapshot(taskId, 0 /* userId */,
+                                    false /* restoreFromDisk */, false /* reducedResolution */);
                         }
                     }
                     return null;