如何更改 flutter 中凸起按钮边框底部的颜色？

Question

How to change color of just one side of the border of a raised button in flutter?

Answer 1

Wrap your raised button within a container. And give

Container(
decoration : BoxDecoration(
      border: Border(
          bottom: BorderSide(
               width:3,
               color : Colors.yellow
         ),
      ),
      child:RaisedButton()
)
)

Answer 2

Try this one... DecoratedBox( decoration:const BoxDecoration( border: Border( bottom: BorderSide(color: Colors.grey), ), ), child: ElevatedButton( onPressed: () { }, child:const Text('Button'), style: ElevatedButton.styleFrom( elevation: 0, primary: Colors.white, onPrimary: Colors.black ), ), ), ...