@Override
  public View onCreateView(
      LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    Log.d(TAG, "onCreateView");
    rootView = inflater.inflate(R.layout.intro_fragment, container, false);
    mpButton = (ImageView) rootView.findViewById(R.id.masterpass_button);
    cardEditor = (CardEditor) rootView.findViewById(R.id.card_editor);
    checkoutButton = (Button) rootView.findViewById(R.id.checkout_button);

    Simplify.init("sbpb_ZWIzODhmMDUtMTkwNC00N2RlLWE5ZGMtNzVlYzhjZmFhZDhk");
    assignListeners();
    applyCustomStyles();
    return rootView;
  }