如何在Flutter上创建复制到剪贴板事件？

dependencies:
  flutter:
    sdk: flutter
  clipboard: ^0.1.3

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:clipboard/clipboard.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Clipboard Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  final String textToCopy = 'Hello, World!';

  void _copyToClipboard() {
    FlutterClipboard.copy(textToCopy).then((value) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(content: Text('Copied to clipboard')),
      );
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Clipboard Demo'),
      ),
      body: Center(
        child: ElevatedButton(
          onPressed: _copyToClipboard,
          child: Text('Copy to Clipboard'),
        ),
      ),
    );
  }
}