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Commit 974769ca authored by Winson Chung's avatar Winson Chung
Browse files

Notify of new top task changes when a top task is moved to the back 

- Launcher currently relies on the current top task to cache the task
  for the next swipe gesture (skipping a synchronous binder call to
  fetch the top task, which can cause ANRs)

Bug: 232423798
Test: Open task B from task A, go back, and ensure Launcher gets
      notified that A is moved to top
Change-Id: Ia1ff90c776437c7443a472cea587b6bf78e332f0
parent 7297f19c

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

+8 −0
Original line number Diff line number Diff line
@@ -451,6 +451,14 @@ final class TaskDisplayArea extends DisplayArea<WindowContainer> { 
        if (!toTop) {

            if (t.mTaskId == mLastLeafTaskToFrontId) {

                mLastLeafTaskToFrontId = INVALID_TASK_ID;



                // If the previous front-most task is moved to the back, then notify of the new

                // front-most task.

                final ActivityRecord topMost = getTopMostActivity();

                if (topMost != null) {

                    mAtmService.getTaskChangeNotificationController().notifyTaskMovedToFront(

                            topMost.getTask().getTaskInfo());

                }

            }

            return;

        }