flutter icon button circle code example

Example 1: circle around icon flutter

CircleAvatar(
   backgroundColor: Colors.white,
   radius: 30,
   child: Icon(Icons.add),
),

Example 2: flutter icon button circle

ClipOval(
  child: Material(
    color: Colors.blue, // button color
    child: InkWell(
      splashColor: Colors.red, // inkwell color
      child: SizedBox(width: 56, height: 56, child: Icon(Icons.menu)),
      onTap: () {},
    ),
  ),
)