Fix TransitionManager.go not running transition.

Bug 19459362

Change-Id: I17595390c9fb289dec8de44447ca490c46570fb4

1 files changed, 16 insertions, 13 deletions

diff --git a/core/java/android/transition/TransitionManager.java b/core/java/android/transition/TransitionManager.java
index 80245ef..0b70fdb 100644
--- a/core/java/android/transition/TransitionManager.java
+++ b/core/java/android/transition/TransitionManager.java
@@ -181,24 +181,27 @@ public class TransitionManager {
     private static void changeScene(Scene scene, Transition transition) {
 
         final ViewGroup sceneRoot = scene.getSceneRoot();
+        if (!sPendingTransitions.contains(sceneRoot)) {
+            sPendingTransitions.add(sceneRoot);
 
-        Transition transitionClone = null;
-        if (transition != null) {
-            transitionClone = transition.clone();
-            transitionClone.setSceneRoot(sceneRoot);
-        }
+            Transition transitionClone = null;
+            if (transition != null) {
+                transitionClone = transition.clone();
+                transitionClone.setSceneRoot(sceneRoot);
+            }
 
-        Scene oldScene = Scene.getCurrentScene(sceneRoot);
-        if (oldScene != null && transitionClone != null &&
-                oldScene.isCreatedFromLayoutResource()) {
-            transitionClone.setCanRemoveViews(true);
-        }
+            Scene oldScene = Scene.getCurrentScene(sceneRoot);
+            if (oldScene != null && transitionClone != null &&
+                    oldScene.isCreatedFromLayoutResource()) {
+                transitionClone.setCanRemoveViews(true);
+            }
 
-        sceneChangeSetup(sceneRoot, transitionClone);
+            sceneChangeSetup(sceneRoot, transitionClone);
 
-        scene.enter();
+            scene.enter();
 
-        sceneChangeRunTransition(sceneRoot, transitionClone);
+            sceneChangeRunTransition(sceneRoot, transitionClone);
+        }
     }
 
     private static ArrayMap<ViewGroup, ArrayList<Transition>> getRunningTransitions() {