Commit 23bc78ac authored Apr 06, 2023 by Yao Qijing

Skip home activity in removeUnreachableHiddenTasks

For devices that support multiple displays, when connecting to a new
display, a new home activity will be added under the new display. It
triggers RecentTasks#removeUnreachableHiddenTasks() to clean up the
unreachable hidden tasks, which may also remove the home activity of the
old display(eg. when the task on the old display is in fullscreen, the
home activity is an unreachable hidden task and therefore, gets
removed). This is not a desired behavior because each display is
expected to have its own home activity.
This change adds a check to avoid removing the home activities in the
removeUnreachableHiddenTasks() method.

Bug: 274862596
Test: Manual test, make sure that connecting an external display doesn't
remove the original home activity.

Change-Id: I1b7e8c9706d8b5ab53766779aec63141ca0669ed

parent ad24c2d9

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

+1 −1

Original line number	Diff line number	Diff line
		@@ -1512,7 +1512,7 @@ class RecentTasks {
		// callbacks here.
		final Task removedTask = mTasks.remove(removeIndex);
		if (removedTask != task) {
		if (removedTask.hasChild()) {
		if (removedTask.hasChild() && !removedTask.isActivityTypeHome()) {
		Slog.i(TAG, "Add " + removedTask + " to hidden list because adding " + task);
		// A non-empty task is replaced by a new task. Because the removed task is no longer
		// managed by the recent tasks list, add it to the hidden list to prevent the task