@Override
  public boolean onOptionsItemSelected(MenuItem item) {
    if (mDrawerToggle.onOptionsItemSelected(item)) {
      return true;
    }

    return super.onOptionsItemSelected(item);
  }
 @Override
 public void onConfigurationChanged(Configuration newConfig) {
   super.onConfigurationChanged(newConfig);
   mDrawerToggle.onConfigurationChanged(newConfig);
 }