set button border radius theme flutter code example
Example 1: rounded raisedbutton in flutter
RaisedButton(
onPressed: () {},
color: Colors.amber,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(10)),
child: Text("Click This"),
)
Example 2: using shape property in flutter for circular corner
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(18.0),
side: BorderSide(color: Colors.red)
),