Navigator.pop（context）在Flutter中完成堆棧中的最后一個Activity時顯示黑屏

Question

我對此進行了很多搜索，但尚未找到正確的解決方案。 我想知道Flutter等同於finish（）（在Java for Android中）

 @override
 Widget build(BuildContext context) {
 return WillPopScope(
  onWillPop: ()  {
    if (counter == 1) {
    // **What should I write here so that my current activity is destroyed with showing the Toast message.**
    }
    Fluttertoast.showToast(
      msg: "Press again for exit!",
      toastLength: Toast.LENGTH_SHORT,
      gravity: ToastGravity.BOTTOM,
    );
    counter++;
    Timer(Duration(seconds: 2), () {
      counter = 0;
    });
    print(counter);
  },
 child: new Scaffold(
      ....................
           );
   );
}

Answer 1

我已經找到解決方案。 絕對可以！

@override
Widget build(BuildContext context) {
return new WillPopScope(
    onWillPop: () {
      if (counter == 1) {
        return Future.value(true);
      }
      Fluttertoast.showToast(
        msg: "Press again for exit!",
        toastLength: Toast.LENGTH_SHORT,
        gravity: ToastGravity.BOTTOM,
      );
      counter++;
      Timer(Duration(seconds: 2), () {
        counter = 0;
      });
      return Future.value(false);
    },
    child: new Scaffold(
      ..................

    ));
 }