Stack(
        children: <Widget>[
          //Other widgets,
          FloatingMenu(
            menuList: floatMenuList,
            callback: this,
            btnBackgroundColor: Colors.black,
            preMenuIcon: Icons.add,
            postMenuIcon: Icons.clear,
          ),
        ],
      )
      

class _FloatingMenuExampleState extends State<FloatingMenuExample>
    implements FloatingMenuCallback {
  String centerText = "Home";

  @override
  Widget build(BuildContext context) {
  
    // here we have a list of Floating menu items
    final List<FloatingMenuItem> floatMenuList = [
      FloatingMenuItem(id: 1, icon: Icons.favorite, backgroundColor: Colors.deepOrangeAccent),
      FloatingMenuItem(id: 2, icon: Icons.map, backgroundColor: Colors.brown),
      FloatingMenuItem(id: 3, icon: Icons.email, backgroundColor: Colors.indigo),
      FloatingMenuItem(id: 4, icon: Icons.event, backgroundColor: Colors.pink),
      FloatingMenuItem(id: 5, icon: Icons.print, backgroundColor: Colors.green),
      FloatingMenuItem(id: 6, icon: Icons.home, backgroundColor: Colors.deepPurple),
    ];

    return Scaffold(
      resizeToAvoidBottomPadding: true,
      appBar: AppBar(
        title: Text(widget.title),
      ),
      // add FloatingMenu Widget inside the Stack widget
      body: Stack(
        children: <Widget>[
          Center(
            child: Text(
              centerText,
              style: TextStyle(color: Colors.black),
            ),
          ),
          FloatingMenu(
            menuList: floatMenuList,
            callback: this,
            btnBackgroundColor: Colors.black,
          ),
        ],
      ),
    );
  }

  @override
  void onMenuClick(FloatingMenuItem floatingMenuItem) {
    
    // callback listener, Perform your operations here
    
    print("onMenuClicked : " + floatingMenuItem.id.toString());
    switch (floatingMenuItem.id) {
      case 1:
        {
          centerText = "Favorite";
        }
        break;
      case 2:
        {
          centerText = "Map";
        }
        break;
      case 3:
        {
          centerText = "Email";
        }
        break;
      case 4:
        {
          centerText = "Event";
        }
        break;
      case 5:
        {
          centerText = "Print";
        }
        break;
      case 6:
        {
          centerText = "Home";
        }
        break;
    }

    setState(() {});
  }
}