Named Routes trong Flutter

Navigator.pushNamed(context, '/profile');

MaterialApp(
  initialRoute: '/',
  routes: {
    '/': (context) => HomeScreen(),
    '/profile': (context) => ProfileScreen(),
    '/settings': (context) => SettingsScreen(),
    '/login': (context) => LoginScreen(),
  },
)

Navigator.pushNamed(context, '/profile');

Navigator.pushReplacementNamed(context, '/home');

Navigator.pushNamedAndRemoveUntil(
  context,
  '/home',
  (route) => false,  // Xóa tất cả
);

Navigator.popAndPushNamed(context, '/profile');

Navigator.pushNamed(
  context,
  '/profile',
  arguments: {'userId': 123, 'name': 'John'},
);
 
// Hoặc với object
Navigator.pushNamed(
  context,
  '/profile',
  arguments: User(id: 123, name: 'John'),
);

class ProfileScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // Nhận arguments
    final args = ModalRoute.of(context)!.settings.arguments as Map<String, dynamic>;
    final userId = args['userId'];
    
    // Hoặc với object
    // final user = ModalRoute.of(context)!.settings.arguments as User;
    
    return Scaffold(
      appBar: AppBar(title: Text('User $userId')),
    );
  }
}

MaterialApp(
  initialRoute: '/',
  onGenerateRoute: (settings) {
    switch (settings.name) {
      case '/':
        return MaterialPageRoute(builder: (_) => HomeScreen());
        
      case '/profile':
        final args = settings.arguments as Map<String, dynamic>?;
        return MaterialPageRoute(
          builder: (_) => ProfileScreen(userId: args?['userId']),
        );
        
      case '/product':
        final productId = settings.arguments as int;
        return MaterialPageRoute(
          builder: (_) => ProductScreen(productId: productId),
        );
        
      default:
        return MaterialPageRoute(builder: (_) => NotFoundScreen());
    }
  },
)

MaterialApp(
  onUnknownRoute: (settings) {
    return MaterialPageRoute(
      builder: (_) => NotFoundScreen(),
    );
  },
)

class AppRoutes {
  static const home = '/';
  static const login = '/login';
  static const profile = '/profile';
  static const settings = '/settings';
  static const productDetail = '/product';
}
 
// Sử dụng
Navigator.pushNamed(context, AppRoutes.profile);

class AppRouter {
  static const home = '/';
  static const login = '/login';
  static const profile = '/profile';
  static const product = '/product';
 
  static Route<dynamic> generateRoute(RouteSettings settings) {
    switch (settings.name) {
      case home:
        return MaterialPageRoute(builder: (_) => HomeScreen());
 
      case login:
        return MaterialPageRoute(builder: (_) => LoginScreen());
 
      case profile:
        final userId = settings.arguments as int?;
        return MaterialPageRoute(
          builder: (_) => ProfileScreen(userId: userId ?? 0),
        );
 
      case product:
        final product = settings.arguments as Product;
        return MaterialPageRoute(
          builder: (_) => ProductDetailScreen(product: product),
        );
 
      default:
        return MaterialPageRoute(
          builder: (_) => Scaffold(
            body: Center(child: Text('Route not found: ${settings.name}')),
          ),
        );
    }
  }
}
 
// main.dart
MaterialApp(
  initialRoute: AppRouter.home,
  onGenerateRoute: AppRouter.generateRoute,
)

class NavigationService {
  static void goToProfile(BuildContext context, int userId) {
    Navigator.pushNamed(context, AppRoutes.profile, arguments: userId);
  }
 
  static void goToProduct(BuildContext context, Product product) {
    Navigator.pushNamed(context, AppRoutes.product, arguments: product);
  }
 
  static void logout(BuildContext context) {
    Navigator.pushNamedAndRemoveUntil(
      context,
      AppRoutes.login,
      (route) => false,
    );
  }
}