MotionTabController _tabController;
  @override
  void initState() {
    super.initState();
    _tabController = new MotionTabController(initialIndex:1,vsync: this);
  }

  @override
  void dispose() {
    super.dispose();
    _tabController.dispose();
  }

  bottomNavigationBar: MotionTabBar(
          labels: [
            "Account","Home","Dashboard"
          ],
          initialSelectedTab: "Home",
          tabIconColor: Colors.green,
          tabSelectedColor: Colors.red,
          onTabItemSelected: (int value){
               print(value);
               setState(() {
                  _tabController.index = value;
               });
          },
          icons: [
            Icons.account_box,Icons.home,Icons.menu
          ],
          textStyle: TextStyle(color: Colors.red),
  ),