decoration: BoxDecoration( borderRadius: BorderRadius.circular(8), border: Border( top: BorderSide( color: Colors.black, 1, style: BorderStyle.solid, ), ), ),
全部邊框線
decoration: BoxDecoration( borderRadius: BorderRadius.circular(8), border: Border.all( color: Colors.black, 1, style: BorderStyle.solid, ), ),
部分圓角
decoration: BoxDecoration( color: Colors.blueAccent, borderRadius: BorderRadius.only( bottomLeft: Radius.circular(20), bottomRight: Radius.circular(20), ), ),