Flutter 如何在颤振中创建带边框的圆形容器？

正如您所注意到的，装饰的背景色稍微溢出了圆形边框。我尝试过不同的方法（例如使用ClipOval），但结果总是一样的

    I have just faced the same issue...
    Easy workaround:

     Container(
        width: 28,
        height: 28,
        decoration: BoxDecoration(
          color: Colors.green.withOpacity(0.25), // border color
          shape: BoxShape.circle,
        ),
        child: Padding(
          padding: EdgeInsets.all(2), // border width
          child: Container( // or ClipRRect if you need to clip the content
            decoration: BoxDecoration(
              shape: BoxShape.circle,
              color: Colors.blue, // inner circle color
            ),
            child: Container(), // inner content
          ),
        ),
      ),

Container(
            height: 200,
            width: 200,
            decoration: BoxDecoration(
              shape: BoxShape.circle,
              border: Border.all(width: 1, color: Colors.red)
            ),
          ),