body:SafeArea(
Expanded(
child: Padding(
padding: EdgeInsets.all(40.0),
child: FlatButton(
textColor: Colors.white,
color: Colors.green,
child: Text(
'True',
style: TextStyle(
color: Colors.white,
fontSize: 20.0,
),
),
onPressed: () {
//The user picked true.
},
),
),
),
);