NHuyHoang

class _BTMAppBarState extends State<BTMAppBar> {
  int navigationIndex = 0;
  GlobalKey globalKey = new GlobalKey(debugLabel: 'btm_app_bar');

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      bottomNavigationBar: new BottomNavigationBar(
        key: globalKey,
        items: [