Flutter中如何嵌入小程序

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

void main() => runApp(MyApp());

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

class HomePage extends StatelessWidget {
  final String _miniProgramId = 'gh_xxx'; // 小程序原始ID
  final String _pagePath = 'pages/home/home'; // 页面路径

  FlutterWechatMiniProgram _miniProgram;

  @override
  Widget build(BuildContext context) {
    _miniProgram = FlutterWechatMiniProgram(
      appId: _miniProgramId,
      path: _pagePath,
      onCodeRecieved: _onCodeReceived,
      onError: _onError,
    );
    return Scaffold(
      appBar: AppBar(title: Text('Flutter Mini Program')),
      body: Center(
        child: RaisedButton(
          child: Text('Open Mini Program'),
          onPressed: () => _miniProgram.launch(),
        ),
      ),
    );
  }

  void _onCodeReceived(int code, String message) {
    print('Mini Program code: $code, message: $message');
  }

  void _onError(FlutterWechatMiniProgramError error) {
    print('Mini Program error: ${error.errCode}, ${error.message}');
  }
}