give border radius . allflutter code example

Example 1: round border container flutter

Container(
  decoration: BoxDecoration(
    border: Border.all(
      color: Colors.red[500],
    ),
    borderRadius: BorderRadius.all(Radius.circular(20))
  ),
  child: ...
)

Example 2: different border radius on container flutter

Container(
              decoration: BoxDecoration(
                  color: gray,
                  borderRadius: BorderRadius.only(
                    bottomLeft: Radius.circular(20),
                    bottomRight: Radius.circular(20),
                  )),
              child: ...,
            ),