Krishnakumar's DartPad

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  MyAppState createState() => MyAppState();
}

class MyAppState extends State<MyApp> {
  
  String SnackBarText = "Yaay, a Snackbar!!";
  
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'A Snackbar Sample',
      home: Scaffold(
        body: Center(
          child: Row(
            children: [
              getSnackBarButton(),
            ],
          ),
        ),
      ),
    );
  }

  getSnackBarButton() {
    return TextButton(
      child: Text("Show Snackbar"),
      onPressed: () {
        ScaffoldMessenger.of(context).showSnackBar(
           SnackBar(content: Text(SnackBarText)),
        );
      },
    );
  }
}