am 568356ff: Merge "Changes callback to a WeakReference in ActivityContainerCallback." into lmp-mr1-modular-dev

* commit '568356ff9a1deab794d329f8c2e245f5a564a2f3':
  Changes callback to a WeakReference in ActivityContainerCallback.

1 files changed, 6 insertions, 1 deletions

diff --git a/core/java/android/app/ActivityView.java b/core/java/android/app/ActivityView.java
index fecaf6f..a7864f4 100644
--- a/core/java/android/app/ActivityView.java
+++ b/core/java/android/app/ActivityView.java
@@ -350,10 +350,15 @@ public class ActivityView extends ViewGroup {
             if (activityView != null) {
                 final ActivityViewCallback callback = activityView.mActivityViewCallback;
                 if (callback != null) {
+                    final WeakReference<ActivityViewCallback> callbackRef =
+                            new WeakReference<>(callback);
                     activityView.post(new Runnable() {
                         @Override
                         public void run() {
-                            callback.onAllActivitiesComplete(activityView);
+                            ActivityViewCallback callback = callbackRef.get();
+                            if (callback != null) {
+                                callback.onAllActivitiesComplete(activityView);
+                            }
                         }
                     });
                 }