如何将Flutter CameraPreview大小设置为“全屏" [英] How to set Flutter CameraPreview Size "Fullscreen"

问题描述

我使用CameraPreview来测量对象的高度，但是问题是我无法全屏设置cameraPreview高度.

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

我尝试过定位的小部件，它会填满整个屏幕，但图像会被拉伸. 我已经尝试过 Transform Widget ，但是高度无法填充全屏，即将出现空白.图像没有拉伸.

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.

我的代码:

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),
                ),
              ),);

请帮助我适应CameraPreview"FULLSCREEN"，而不会产生图像拉长的情况.

推荐答案

问题已通过将中心"窗口小部件包装在转换"窗口小部件中解决

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),
                       ),
                   ),),);

这篇关于如何将Flutter CameraPreview大小设置为“全屏"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！