Question

我正在编写一个Flutter应用程序，我想在达到条件时在没有任何用户交互的情况下更改页面将导航设置为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()),
        ),
      ),
    );
  }
}

这是一个带有变量的代码，每次获取一个值，当a = 2时，我要导航

Answer 1

编辑：

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

颤抖如何自动从页面导航到另一个

1 个答案: