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, 7 insertions, 0 deletions

diff --git a/src/com/android/gallery3d/app/ActivityState.java b/src/com/android/gallery3d/app/ActivityState.java
index 6a0c72c52..519eaff58 100644
--- a/src/com/android/gallery3d/app/ActivityState.java
+++ b/src/com/android/gallery3d/app/ActivityState.java
@@ -46,6 +46,8 @@ abstract public class ActivityState {
         ResultEntry next;
     }
 
+    private boolean mDestroyed = false;
+
     protected ActivityState() {
     }
 
@@ -139,5 +141,10 @@ abstract public class ActivityState {
     }
 
     protected void onDestroy() {
+        mDestroyed = true;
+    }
+
+    boolean isDestroyed() {
+        return mDestroyed;
     }
 }