如何在Flutter Web App中连接Google Analytics？

import 'package:google_analytics/google_analytics.dart';

void main() {
  // 初始化Google Analytics
  GoogleAnalytics analytics = GoogleAnalytics(trackingId: 'YOUR_TRACKING_ID');
  runApp(MyApp(analytics: analytics));
}

void trackPageView(String pageName) {
  analytics.sendPageView(pageName);
}

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // 发送页面浏览事件
    trackPageView('Home Page');

    return Scaffold(
      appBar: AppBar(
        title: Text('Home'),
      ),
      body: Center(
        child: Text('Welcome to the Home page!'),
      ),
    );
  }
}

void trackEvent(String category, String action) {
  analytics.sendEvent(category: category, action: action);
}

class MyButton extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return RaisedButton(
      onPressed: () {
        // 发送自定义事件
        trackEvent('Button', 'Click');
      },
      child: Text('Click Me'),
    );
  }
}