Flutter 如何自动从一个页面导航到另一个页面

Question

I'm writing a flutter application and i want to change the page without any users interaction when a condition is reached iw ant the navigation to be when a =2;

  int a=0;

  HeadsetEvent headsetPlugin = new HeadsetEvent();
  HeadsetState headsetEvent;

  @override
  void initState() {
    super.initState();

    /// if headset is plugged
    headsetPlugin.getCurrentState.then((_val){
      setState(() {
        headsetEvent = _val;
        a=1;
      });
    });

    /// Detect the moment headset is plugged or unplugged
    headsetPlugin.setListener((_val) {
      setState(() {
        headsetEvent = _val;
        a=2;
      });
    });
  }



  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("auto navigation"),
        ),
        body: Center(
          child: Text(a.toString()),
        ),
      ),
    );
  }
}

that's a code with a variable aa eaach time take a value i want the navigation when a=2 thank you

Answer 1

Edit:

headsetPlugin.setListener((_val) {
  setState(() {
    headsetEvent = _val;
  });
Navigator.push(
        context,
        MaterialPageRoute(builder: (context) => SecondRoute()),
      );
});