Fix memory leaks in music app.
Fixes http://b/issue?id=2046569
diff --git a/src/com/android/music/ArtistAlbumBrowserActivity.java b/src/com/android/music/ArtistAlbumBrowserActivity.java
index 35bf54e..0932f12 100644
--- a/src/com/android/music/ArtistAlbumBrowserActivity.java
+++ b/src/com/android/music/ArtistAlbumBrowserActivity.java
@@ -158,6 +158,11 @@
                 c.close();
             }
         }
+        // Because we pass the adapter to the next activity, we need to make
+        // sure it doesn't keep a reference to this activity. We can do this
+        // by clearing its DatasetObservers, which setListAdapter(null) does.
+        setListAdapter(null);
+        mAdapter = null;
         unregisterReceiver(mScanListener);
         super.onDestroy();
     }