// Copyright 2014 The Flutter Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Template: dev/snippets/config/templates/stateless_widget_material.tmpl // // Comment lines marked with "▼▼▼" and "▲▲▲" are used for authoring // of samples, and may be ignored if you are just exploring the sample. // Flutter code sample for MaterialBanner // //*************************************************************************** //* ▼▼▼▼▼▼▼▼ description ▼▼▼▼▼▼▼▼ (do not modify or remove section marker) // MaterialBanner's can also be presented through a [ScaffoldMessenger]. // Here is an example where ScaffoldMessengerState.showMaterialBanner() is used to show the MaterialBanner. //* ▲▲▲▲▲▲▲▲ description ▲▲▲▲▲▲▲▲ (do not modify or remove section marker) //*************************************************************************** import 'package:flutter/material.dart'; void main() => runApp(const MyApp()); /// This is the main application widget. class MyApp extends StatelessWidget { const MyApp({Key? key}) : super(key: key); static const String _title = 'Flutter Code Sample'; @override Widget build(BuildContext context) { return const MaterialApp( title: _title, home: MyStatelessWidget(), ); } } /// This is the stateless widget that the main application instantiates. class MyStatelessWidget extends StatelessWidget { const MyStatelessWidget({Key? key}) : super(key: key); @override //******************************************************************** //* ▼▼▼▼▼▼▼▼ code ▼▼▼▼▼▼▼▼ (do not modify or remove section marker) Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text('The MaterialBanner is below'), ), body: Center( child: ElevatedButton( child: const Text('Show MaterialBanner'), onPressed: () => ScaffoldMessenger.of(context).showMaterialBanner( const MaterialBanner( padding: EdgeInsets.all(20), content: Text('Hello, I am a Material Banner'), leading: Icon(Icons.agriculture_outlined), backgroundColor: Colors.green, actions: [ TextButton( child: Text('DISMISS'), onPressed: null, ), ], ), ), ), ), ); } //* ▲▲▲▲▲▲▲▲ code ▲▲▲▲▲▲▲▲ (do not modify or remove section marker) //******************************************************************** }