Urgent: I want to navigate to another screens from the Grid Flat Icons.Please Guide

I am unable to keep a navigation event using container like Container( color: Colors.cyan[100], child: GestureDetector ( onTap:(){ Navigator.of(context).push(MaterialPageRoute(builder:(context)=>MobileAccessoriesPage(), ), ); }, child: Center (child:Text ('Mobiles'),icon: Icons.mobile_screen_share), ), ), How to use container at const List choices = const [ const Choice(title: 'Car', icon: Icons.directions_car), const Choice(title: 'Bicycle', icon: Icons.directions_bike), const Choice(title: 'Boat', icon: Icons.directions_boat), const Choice(title: 'Bus', icon: Icons.directions_bus), ]