Why setState not re-render my child stateful widget

[Bảo Nguyễn Ngọc]

This is my code:

var _showGoogleMaps = false;

@override

  void initState() {

    super.initState();

    Future.delayed(Duration(milliseconds: 2000), () => setState(() {

    _showGoogleMaps = true;

    } ));

  }

@override

  Widget build(BuildContext context) {

    return 

      //example 1

      // _showGoogleMaps ? Container(height: 500, color: Colors.red)

      //          : Container(height: 500, color: Colors.blue);

      //example 2

      FullImageView(

      imgCodeVal: imgCodeVal,

      child: Container(height: 500, color: _showGoogleMaps ? Colors.blue : Colors.red));

      //example 3

      // Container(

      // child: Container(height: 500, color: _showGoogleMaps ? Colors.blue : Colors.red));

  }

In example 1 and 3, the container color will change from red to blue after 2 seconds.

But in example 2, the color is red and not changed. FullImageView is just a normal stateful widget

I dont understand why. Anyone knows the reason. Thanks

[Suzuki Tomohiro]

This article explains the problem that you can solve with Keys.

https://link.medium.com/5mtgOOjcpeb

--
You received this message because you are subscribed to the Google Groups "Flutter Development (flutter-dev)" group.
To unsubscribe from this group and stop receiving emails from it, send an email to flutter-dev...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/flutter-dev/d0ea63b0-9f5c-4f92-bc81-423a4ab2810an%40googlegroups.com.