Flutter-Boxdecoration邊框線, 圓角

decoration: BoxDecoration(
                    borderRadius: BorderRadius.circular(8),
                    border: Border(
                      top: BorderSide(
                        color: Colors.black,
                        width: 1,
                        style: BorderStyle.solid,
                      ),
                    ),
                  ),

全部邊框線

decoration: BoxDecoration(
                    borderRadius: BorderRadius.circular(8),
                    border: Border.all(
                      color: Colors.black,
                      width: 1,
                      style: BorderStyle.solid,
                    ),
                  ),

 部分圓角

decoration: BoxDecoration(
                color: Colors.blueAccent,
                borderRadius: BorderRadius.only(
                  bottomLeft: Radius.circular(20),
                  bottomRight: Radius.circular(20),
                ),
              ),