@Override
 public void onDestroy() {
   MusicUtils.unbindFromService(this);
   unregisterReceiver(mScanListener);
   super.onDestroy();
   if (!mAdapterSent && mAdapter != null) {
     Cursor c = mAdapter.getCursor();
     if (c != null) {
       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;
   mAdapterDestroyed = true;
 }