Modify SwipeDismissLayout to perform its own exit animation

Instead of relying on the window animation system, in the special
case of a swipe-dismiss, disable any default window exit animation
and perform a custom animation. This bypasses some bugs in the
window animator codebase and allows us to have a nice "rebound"
animation if the user doesn't swipe far/fast enough to trigger a
dismiss.

Bug: 33041168
Change-Id: Ied45700d35a59950bacef1ba0650eaa5bc60fadb

1 files changed, 6 insertions, 3 deletions

diff --git a/core/java/android/view/Window.java b/core/java/android/view/Window.java
index 1cca0742877f..a36127db559f 100644
--- a/core/java/android/view/Window.java
+++ b/core/java/android/view/Window.java
@@ -581,8 +581,10 @@ public abstract class Window {
          * Called when a window is dismissed. This informs the callback that the
          * window is gone, and it should finish itself.
          * @param finishTask True if the task should also be finished.
+         * @param suppressWindowTransition True if the resulting exit and enter window transition
+         * animations should be suppressed.
          */
-        void onWindowDismissed(boolean finishTask);
+        void onWindowDismissed(boolean finishTask, boolean suppressWindowTransition);
     }
 
     /** @hide */
@@ -871,9 +873,10 @@ public abstract class Window {
     }
 
     /** @hide */
-    public final void dispatchOnWindowDismissed(boolean finishTask) {
+    public final void dispatchOnWindowDismissed(
+            boolean finishTask, boolean suppressWindowTransition) {
         if (mOnWindowDismissedCallback != null) {
-            mOnWindowDismissedCallback.onWindowDismissed(finishTask);
+            mOnWindowDismissedCallback.onWindowDismissed(finishTask, suppressWindowTransition);
         }
     }