Change Route like Viu using Drawer

change_route.dart

void _changeRoute(BuildContext context, String newRouteName) {
    print('newRouteName: $newRouteName');
    // Close drawer
    Navigator.pop(context);

    // Check current screen status
    bool currentRouteIsHome = false;
    bool currentRouteIsNewRoute = false;

    Navigator.popUntil(context, (currentRoute) {
      print('currentRoute: ${currentRoute.settings.name}');
      // This is just a way to access currentRoute; the top route in the
      // Navigator stack.
      if (currentRoute.settings.name == Routes.categories) {
        currentRouteIsHome = true;
      }
      if (currentRoute.settings.name == newRouteName) {
        currentRouteIsNewRoute = true;
      }

      // Return true so popUntil() pops nothing.
      return true;
    });

    print('currentRouteIsHome: $currentRouteIsHome');
    print('currentRouteIsNewRoute: $currentRouteIsNewRoute');

    // Switch screen
    if (!currentRouteIsNewRoute) {
      // Only switch screen if new route is different from current route.
      if (currentRouteIsHome) {
        // Navigate from home to non-home screen.
        Navigator.pushNamed(context, newRouteName);
      } else {
        if (newRouteName == Routes.categories) {
          // Navigate from non-home screen to home.
          Navigator.pop(context);
        } else {
          // Navigate from non-home screen to non-home screen.
          Navigator.popAndPushNamed(context, newRouteName);
        }
      }
    }
  }