Merge "Fix flickering when cancel cross activity animation." into udc-qpr-dev am: 672de42998 am: 4f743e5834

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24397717

Change-Id: I7be16680e265ac4f84f4f9d9e23d58a479c0bba1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/back/CrossActivityAnimation.java b/libs/WindowManager/Shell/src/com/android/wm/shell/back/CrossActivityAnimation.java
index 9181281..114486e 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/back/CrossActivityAnimation.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/back/CrossActivityAnimation.java
@@ -379,7 +379,15 @@
 
         @Override
         public void onBackCancelled() {
-            mProgressAnimator.onBackCancelled(CrossActivityAnimation.this::finishAnimation);
+            mProgressAnimator.onBackCancelled(() -> {
+                // mProgressAnimator can reach finish stage earlier than mLeavingProgressSpring,
+                // and if we release all animation leash first, the leavingProgressSpring won't
+                // able to update the animation anymore, which cause flicker.
+                // Here should force update the closing animation target to the final stage before
+                // release it.
+                setLeavingProgress(0);
+                finishAnimation();
+            });
         }
 
         @Override