如何在flutter中从streambuilder导航到其他页面？

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  StreamController<bool> _controller = StreamController<bool>();

  @override
  void dispose() {
    _controller.close();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('StreamBuilder Navigation'),
      ),
      body: Center(
        child: StreamBuilder<bool>(
          stream: _controller.stream,
          builder: (BuildContext context, AsyncSnapshot<bool> snapshot) {
            if (snapshot.hasData && snapshot.data) {
              // 如果数据已经加载完毕，导航到其他页面
              return RaisedButton(
                child: Text('Go to Other Page'),
                onPressed: () {
                  Navigator.push(
                    context,
                    MaterialPageRoute(builder: (context) => OtherPage()),
                  );
                },
              );
            } else {
              // 数据还在加载中，显示加载动画或者占位符等
              return CircularProgressIndicator();
            }
          },
        ),
      ),
    );
  }
}

class OtherPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Other Page'),
      ),
      body: Center(
        child: Text('This is another page.'),
      ),
    );
  }
}