void rebuildIndex(boolean reCreate) {
    final TextView indexStatus = (TextView) this.findViewById(R.id.index_status);
    indexStatus.setVisibility(View.INVISIBLE);
    indexStatus.setText(R.string.rebuild_index_progress_title);

    final Handler statusHandler = new Handler(Looper.getMainLooper(), new Handler.Callback() {
      @Override
      public boolean handleMessage(Message msg) {
        if (msg.obj == null) {
          indexStatus.setVisibility(View.GONE);
        } else if (msg.obj.equals("show")) { // TODO quick demo, shouldn't use literal text.
          indexStatus.setVisibility(View.VISIBLE);
        } else {
          Log.d(TAG, msg.obj.toString());
          if (indexStatus.getVisibility() != View.VISIBLE) {
            indexStatus.setVisibility(View.VISIBLE);
          }
          indexStatus.setText(msg.obj.toString());
        }
        return false;
      }
    });

    Indexer.rebuildIndexIfNecessary(statusHandler, reCreate);
  }

private void updateIndexStatus(String msg) {
    indexStatus.setText(msg);
}

} else {
Log.d(TAG, msg.obj.toString());
      if (indexStatus.getVisibility() != View.VISIBLE) {
        indexStatus.setVisibility(View.VISIBLE);
      }
      updateIndexStatus(msg.obj.toString());
}