flutter flatbutton border code example

Example 1: flat button rounded shape

new OutlineButton(
  child: new Text("Button text"),
  onPressed: null,
  shape: new RoundedRectangleBorder(borderRadius: new BorderRadius.circular(30.0))
)

Example 2: border at circleAvatar flutter

CircleAvatar(
    radius: 30,
    backgroundColor: Colors.teal,
    child: CircleAvatar(
      backgroundImage: AssetImage('assets/appdev.png'),
      radius: 28,
    ),
  ),

Example 3: flatbutton flutter

FlatButton(
  onPressed: () {
    /*...*/
  },
  child: Text(
    "Flat Button",
  ),
)