如何使flutter应用程序在其中打开另一个应用程序而不是webview

dependencies:
  flutter_launcher_name: ^0.0.1
  flutter_launcher_icons: ^0.7.0

flutter_icons:
  android: true
  ios: true
  image_path: "assets/icon.png"

flutter pub get
flutter pub run flutter_launcher_icons:main
flutter pub run flutter_launcher_name:main

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

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

class MyApp extends StatelessWidget {
  void _launchApp() async {
    final String urlScheme = 'app_scheme://'; // 替换为要打开的应用程序的URL Scheme
    if (await canLaunch(urlScheme)) {
      await launch(urlScheme);
    } else {
      throw 'Could not launch $urlScheme';
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Open App Example'),
        ),
        body: Center(
          child: RaisedButton(
            onPressed: _launchApp,
            child: Text('Open App'),
          ),
        ),
      ),
    );
  }
}