FutureBuilder - setState() or markNeedsBuild() called during build error

I have the below FutureBuilder entry.

FutureBuilder(                  future: _checkConn,                  builder: (BuildContext context, AsyncSnapshot snapshot) {                    switch (snapshot.connectionState){                      case ConnectionState.none:                        Navigator.pushReplacementNamed(context, NoConnView);                        break;                      case ConnectionState.active:                      case ConnectionState.waiting:                      case ConnectionState.done:                        if(snapshot.data=='OK'){                          initialfbget();                          break;                        } else {                          Navigator.pushReplacementNamed(context, NoConnView);                          break;                        }                    }                    return SizedBox.expand(                      child: FittedBox(                        fit: BoxFit.fill,                        child: SizedBox(                          width: _vcontroller.value.size?.width ?? (MediaQuery.of(context).size.width),                          height: _vcontroller.value.size?.height ?? (MediaQuery.of(context).size.height),                          child: VideoPlayer(_vcontroller),                        ),                      ),                    );                    }              ),  

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The below is the complete initstate section:

void initState()  {      super.initState ();        _vcontroller = VideoPlayerController.asset("assets/testimages/sukiitestanimation.mp4")        ..initialize().then((_) {          // Once the video has been loaded we play the video and set looping to true.          _vcontroller.play();          _vcontroller.setLooping(false);          // Ensure the first frame is shown after the video is initialized.        });        _checkConn = checkConn();      Firebase.initializeApp();    }  

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Below is the checkconn segment:

Future<String> checkConn() async {      var connresponse = await http.get(connurl).timeout(const Duration(seconds: 10));      log('connresponse is: ${connresponse.statusCode}');      if(connresponse.statusCode!=200) {        return "BAD";      } else {        return "OK";      }    }  

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Kept on receiving the below error.

setState() or markNeedsBuild() called during build.

Would appreciate any assistance on this.

Thanks in advance.

https://stackoverflow.com/questions/65756116/futurebuilder-setstate-or-markneedsbuild-called-during-build-error January 17, 2021 at 08:24AM