@Override public void onPause() {
    super.onPause();
    BusProvider.getInstance().unregister(this);

    // Stop existing download, if it exists.
    if (downloadTask != null) {
      downloadTask.cancel(true);
      downloadTask = null;
    }
  }
Display a map centered on the last known location.
otto-sample/src/main/java/com/squareup/otto/sample/LocationMapFragment.java