@Override
 public void onProgressChanged(Tab tab) {
   super.onProgressChanged(tab);
   if (mComboView != null && !mComboView.isShowing()) {
     mActionBar = mActivity.getActionBar();
     setupActionBar();
     if (mActionBar != null) mActionBar.show();
     if (mNavBar != null) mNavBar.setVisibility(View.VISIBLE);
   }
 }