How to set Flutter CameraPreview Size “Fullscreen”

问题

Iam using CameraPreview for measuring height of an object,But the issue was i cant able to set cameraPreview height full screen..

I have tried Positioned widget, it fills the screen but the image was stretched. I have tried Transform Widget, but height does not fills fullscreen, white space is coming.Image is not stretched.

Mycode:

final size = MediaQuery.of(context).size;
final deviceRatio = size.width / size.height;

return Stack(
            children: <Widget>[
              Transform.scale(
                scale: controller.value.aspectRatio/deviceRatio,
                child: new AspectRatio(
                  aspectRatio: controller.value.aspectRatio,
                  child: new CameraPreview(controller),
                ),
              ),);

Kindly help me to fit CameraPreview "FULLSCREEN" without image streching..

回答1:

Issue has been solved by wrapping Centre widget in Transform widget

final size = MediaQuery.of(context).size;
final deviceRatio = size.width / size.height;
return Stack(
            children: <Widget>[
              Center(
                child:Transform.scale(
                      scale: controller.value.aspectRatio/deviceRatio,
                      child: new AspectRatio(
                       aspectRatio: controller.value.aspectRatio,
                       child: new CameraPreview(controller),
                       ),
                   ),),);

来源：https://stackoverflow.com/questions/56735552/how-to-set-flutter-camerapreview-size-fullscreen