Request sync when there's no mediaItem in a mediaSet.

This is to fix the problem where media items haven't been sync'ed when the album
set or album is viewed for the first time.

+ Add MediaSet.SyncListener.
+ Make AlbumPage and AlbumSetPage implement SyncListener.
+ Implement requestSync() for ComboAlbum and ComboAlbumSet.
+ add ActivityState.isDestroyed(). This also fixes the problem where
  StateManager.finishState() may be called twice.

Bug: 5337899
Change-Id: I25364c3ac25721a2650701c5d7931bfb6daa9303

1 files changed, 8 insertions, 3 deletions

diff --git a/src/com/android/gallery3d/app/StateManager.java b/src/com/android/gallery3d/app/StateManager.java
index 9c55fbd15..556a06aa4 100644
--- a/src/com/android/gallery3d/app/StateManager.java
+++ b/src/com/android/gallery3d/app/StateManager.java
@@ -161,9 +161,14 @@ public class StateManager {
     void finishState(ActivityState state) {
         Log.v(TAG, "finishState " + state.getClass());
         if (state != mStack.peek().activityState) {
-            throw new IllegalArgumentException("The stateview to be finished"
-                    + " is not at the top of the stack: " + state + ", "
-                    + mStack.peek().activityState);
+            if (state.isDestroyed()) {
+                Log.d(TAG, "The state is already destroyed");
+                return;
+            } else {
+                throw new IllegalArgumentException("The stateview to be finished"
+                        + " is not at the top of the stack: " + state + ", "
+                        + mStack.peek().activityState);
+            }
         }
 
         // Remove the top state.