btn.dart

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: buildAppBar(appBarTitle: title),
      body: Center(
        child: ElevatedButton(
          style: getBtnStyle(context),
          child: const Text('Set badge no'),
          onPressed: () => setBadgeNum(5, context),
        ),
      ),
    );
  }