beer_list.dart

 Widget build(BuildContext context) {
    return Scaffold(
        key: scaffoldKey,
        body: Center(
            child: SingleChildScrollView(
          padding: const EdgeInsets.all(8.0),
          child: Column(
            children: <Widget>[
              Center(
                child: showCamera
                    ? Container(
                        height: 290,
                        child: Padding(
                          padding: const EdgeInsets.only(top: 5),
                          child: Center(child: cameraPreviewWidget()),
                        ),
                      )
                    : Column(
                        mainAxisAlignment: MainAxisAlignment.center,
                        children: <Widget>[
                            imagePreviewWidget(),
                            editCaptureControlRowWidget(),
                          ]),
              ),
              showCamera ? captureControlRowWidget() : Container(),
              cameraOptionsWidget(),
              beerInfoInputsWidget()
            ],
          ),
        )));
  }