DART

flutter flotingactionbutton

floatingActionButton: FloatingActionButton(
        onPressed: () {},
        child: const Icon(Icons.add),
        backgroundColor: Colors.blue,
),

flutter flotingactionbutton extend

floatingActionButton: FloatingActionButton.extended(
        onPressed: (){},
        icon: Icon(Icons.refresh),
        label: Text('Refresh'),
      ),