Centering the extended FAB
All you need to do is set the floatingActionButtonLocation property on Scaffold
class _MyHomePageState extends State<MyHomePage> { @override Widget build(BuildContext context) { return new Scaffold( appBar: ... body: ... floatingActionButton: MyFloatingActionButton(), floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat ); }class MyFloatingActionButton extends StatelessWidget { @override Widget build(BuildContext context) { return FloatingActionButton.extended( icon: Icon(Icons.plus_one), onPressed: () => {}, label: new Text('See all results')); }}Just note this is a duplicate of the question: Flutter - FloatingActionButton in the center