If resume occurs, force finish of exiting activity.

Bug 27231404
Bug 27274246

Change-Id: Ia92fe6fdebced3e5a1fc9d165212ac1196f395bd

core/java/android/app/Activity.java

@@ -1246,7 +1246,7 @@ public class Activity extends ContextThemeWrapper
     protected void onResume() {
         if (DEBUG_LIFECYCLE) Slog.v(TAG, "onResume " + this);
         getApplication().dispatchActivityResumed(this);
-        mActivityTransitionState.onResume();
+        mActivityTransitionState.onResume(this, isTopOfTask());
         mCalled = true;
     }
 

core/java/android/app/ActivityTransitionState.java

@@ -236,9 +236,27 @@ class ActivityTransitionState {
         }
     }
 
-    public void onResume() {
-        restoreExitedViews();
-        restoreReenteringViews();
+    public void onResume(Activity activity, boolean isTopOfTask) {
+        // After orientation change, the onResume can come in before the top Activity has
+        // left, so if the Activity is not top, wait a second for the top Activity to exit.
+        if (mCalledExitCoordinator == null) {
+            return; // This is the called activity
+        }
+        if (isTopOfTask || mEnterTransitionCoordinator == null) {
+            restoreExitedViews();
+            restoreReenteringViews();
+        } else {
+            activity.mHandler.postDelayed(new Runnable() {
+                @Override
+                public void run() {
+                    if (mEnterTransitionCoordinator == null ||
+                            mEnterTransitionCoordinator.isWaitingForRemoteExit()) {
+                        restoreExitedViews();
+                        restoreReenteringViews();
+                    }
+                }
+            }, 1000);
+        }
     }
 
     public void clear() {

core/java/android/app/EnterTransitionCoordinator.java

@@ -244,6 +244,10 @@ class EnterTransitionCoordinator extends ActivityTransitionCoordinator {
         }
     }
 
+    public boolean isWaitingForRemoteExit() {
+        return mIsReturning && mResultReceiver != null;
+    }
+
     /**
      * This is called onResume. If an Activity is resuming and the transitions
      * haven't started yet, force the views to appear. This is likely to be
@@ -288,6 +292,10 @@ class EnterTransitionCoordinator extends ActivityTransitionCoordinator {
             cancelPendingTransitions();
         }
         mAreViewsReady = true;
+        if (mResultReceiver != null) {
+            mResultReceiver.send(MSG_CANCEL, null);
+            mResultReceiver = null;
+        }
     }
 
     private void cancel() {

core/java/android/app/ExitTransitionCoordinator.java

@@ -100,6 +100,10 @@ class ExitTransitionCoordinator extends ActivityTransitionCoordinator {
                 mExitSharedElementBundle = resultData;
                 sharedElementExitBack();
                 break;
+            case MSG_CANCEL:
+                mIsCanceled = true;
+                finish();
+                break;
         }
     }