Do not load exit animation again if window is already animating

Transition can be started as soon as the entering app is drawn.
If the exiting app relayouts to invisible after transition started,
don't load the exit animation again.

bug: 29405575
Change-Id: I05ba4f733afb9426626db113be721a6bf888f093

diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index b8b7848..54960a4 100644 (file)
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -3003,7 +3003,8 @@ public class WindowManagerService extends IWindowManager.Stub
         if (win.mAttrs.type == TYPE_APPLICATION_STARTING) {
             transit = WindowManagerPolicy.TRANSIT_PREVIEW_DONE;
         }
-        if (win.isWinVisibleLw() && winAnimator.applyAnimationLocked(transit, false)) {
+        if (win.isWinVisibleLw() && !winAnimator.isAnimationSet()
+                && winAnimator.applyAnimationLocked(transit, false)) {
             focusMayChange = isDefaultDisplay;
             win.mAnimatingExit = true;
             win.mWinAnimator.mAnimating = true;