String imageNetwork = "http://pic41.nipic.com/20140514/5295460_234432363121_2.jpg";
return Container (
//父视图如果不对宽高进行设置，那么默认取屏幕宽高
decoration: BoxDecoration(
color: Colors.red,
shape: BoxShape.circle,
image: DecorationImage(image: NetworkImage(imageNetwork),),
),
);
BoxShape_circle_1.png
//BoxDecoration不设置image时，父视图的取宽高中的较小值画圆，这时展示的是圆
//BoxDecoration设置image时，以父视图的宽高中的较大值切圆，这时展示的不是圆
return Container (
decoration: BoxDecoration(
color: Colors.red,
shape: BoxShape.circle,
// image: DecorationImage(image: NetworkImage(imageNetwork),),
),
BoxShape_circle_2.png
//Container 的 color 和 decoration 不能同时设置
//BoxShape.circle 默认切的就是圆，所以不用设置borderRadius
//BoxShape.rectangle 可以切圆角矩形
return Center(
child: Container(width: 300, height: 300,
decoration: BoxDecoration(
shape: BoxShape.circle,
image: DecorationImage(image: NetworkImage(imageNetwork),),
),
),
);
return Center(
child: Container(width: 300, height: 300,
decoration: BoxDecoration(
shape: BoxShape.rectangle,
borderRadius: BorderRadius.circular(20.0),
image: DecorationImage(image: NetworkImage(imageNetwork),),
),
),
);
BoxShape_circle_3.png
