Custom Error Widget

custom_error.dart

    return MaterialApp(
      title: 'Flutter App',
      builder: (context, widget) {
        ErrorWidget.builder = (FlutterErrorDetails errorDetails) {
          return CustomErrorWidget(errorDetails: errorDetails);
        };
        return widget ?? const Scaffold();
      },
    ...
    ...
      

class CustomErrorWidget extends StatelessWidget {
  final FlutterErrorDetails errorDetails;

  const CustomErrorWidget({
    Key? key,
    required this.errorDetails,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return const Card(
      color: Colors.red,
      margin: EdgeInsets.zero,
      child: Padding(
        padding: EdgeInsets.all(8.0),
        child: Text(
          "Something is not right here...",
          style: TextStyle(
            color: Colors.white,
            fontWeight: FontWeight.bold,
          ),
        ),
      ),
    );
  }
}