Flutter如何在应用中打开浏览器并跳转到指定网页

本示例介绍了在Flutter应用中如何通过url_launcher库打开系统默认浏览器并跳转到指定网页的实现方式。需要安装url_launcher库进行开发。

import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomePage(),
    );
  }
}

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('打开浏览器示例'),
      ),
      body: Center(
        child: ElevatedButton(
          onPressed: _launchURL,
          child: Text('打开浏览器并跳转到Flutter官网'),
        ),
      ),
    );
  }

  // 打开浏览器并跳转到指定url
  _launchURL() async {
    const url = 'https://flutter.dev/';
    if (await canLaunch(url)) {
      await launch(url);
    } else {
      throw 'Could not launch $url';
    }
  }
}

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