shape: RoundedRectangleBorder(),
shape: BeveledRectangleBorder(),
shape: ContinuousRectangleBorder(),
shape: CircleBorder(),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(18.0),
side: BorderSide(color: Theme.of(context).primaryColor),
),
RaisedButton(child: Text('Button'),
onPressed: null,
color: Colors.red,
textColor: Colors.yellow,
padding: EdgeInsets.fromLTRB(10, 10, 10, 10),
splashColor: Colors.grey,
)