Default hide animation leash of opening tasks.

RecentsTransitionHandler doesn't know the initial tasks position when
tasks appeared, only RecentsAnimationRunner know. So there shouldn't
show the animation leash immediately, otherwise the opening tasks could
shows up in the final position, before RecentsAnimationRunner start
the opening animation.

Bug: 277704255
Test: manual, entering recents, launch another task, verify no flicker
during the opening animation.

Change-Id: I1c384b825348d8a67d49c4cec89a61a9a6f9687f

1 files changed, 2 insertions, 0 deletions

diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/recents/RecentsTransitionHandler.java b/libs/WindowManager/Shell/src/com/android/wm/shell/recents/RecentsTransitionHandler.java
index b55487258220..0482bada47cb 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/recents/RecentsTransitionHandler.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/recents/RecentsTransitionHandler.java
@@ -565,6 +565,8 @@ public class RecentsTransitionHandler implements Transitions.TransitionHandler {
                         final int rootIdx = TransitionUtil.rootIndexFor(change, mInfo);
                         t.reparent(appearedTargets[i].leash, mInfo.getRoot(rootIdx).getLeash());
                         t.setLayer(appearedTargets[i].leash, layer);
+                        // Hide the animation leash, let listener show it.
+                        t.hide(appearedTargets[i].leash);
                         ProtoLog.v(ShellProtoLogGroup.WM_SHELL_RECENTS_TRANSITION,
                                 "  opening new taskId=%d", appearedTargets[i].taskId);
                         mOpeningTasks.add(new TaskState(change, appearedTargets[i].leash));