тяжко было

lib/AnimalName.dart

@@ -0,0 +1,8 @@
+//Enums
+enum AnimalName {
+  lion,
+  elephant,
+  giraffe,
+  tiger,
+  zebra,
+}

lib/animal.dart

@@ -1,6 +1,21 @@
+import 'AnimalName.dart';
+
+//Classes
 class Animal {
-  final String name;
+  final AnimalName name;
   final String description;
 
   Animal({required this.name, required this.description});
-}
+
+  //Methods
+  String printAnimal() {
+    return 'Name: ${name.toStringName()}, Description: $description';
+  }
+}
+
+  // Extension
+  extension AnimalNameExtension on AnimalName {
+    String toStringName() {
+      return toString().split('.').last;
+    }
+  }

lib/main.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'animal.dart';
+import 'AnimalName.dart';
 
 void main() {
   runApp(const MyApp());
@@ -11,7 +12,7 @@ class MyApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Зоопарк',
+      title: 'Zoo',
       theme: ThemeData(
         colorScheme: ColorScheme.fromSeed(seedColor: Colors.orange),
         useMaterial3: true,
@@ -28,7 +29,7 @@ class HomeScreen extends StatelessWidget {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text('Зоопарк'),
+        title: const Text('Zoo'),
       ),
       body: Center(
         child: ElevatedButton(
@@ -41,46 +42,85 @@ class HomeScreen extends StatelessWidget {
             );
           },
           style: ElevatedButton.styleFrom(
-            padding: const EdgeInsets.symmetric(horizontal: 40, vertical: 20), // Увеличиваем размер кнопки
+            padding: const EdgeInsets.symmetric(horizontal: 40, vertical: 20),
-            textStyle: const TextStyle(fontSize: 22), // Увеличиваем размер текста
+            textStyle: const TextStyle(fontSize: 34),
           ),
-          child: const Text('Показать список животных'),
+          child: const Text('Show Animal List'),
         ),
       ),
     );
   }
 }
 
-class AnimalListScreen extends StatelessWidget {
+class AnimalListScreen extends StatefulWidget {
   const AnimalListScreen({super.key});
 
   @override
-  Widget build(BuildContext context) {
+  _AnimalListScreenState createState() => _AnimalListScreenState();
-    final List<Animal> animals = [
+}
-      Animal(name: 'Лев', description: 'Король зверей'),
+
-      Animal(name: 'Слон', description: 'Крупнейшее наземное животное'),
+class _AnimalListScreenState extends State<AnimalListScreen> {
-      Animal(name: 'Жираф', description: 'Животное с самой длинной шеей'),
+  late Future<List<Animal>> _animalsFuture;
-      Animal(name: 'Тигр', description: 'Большая кошка с полосатым мехом'),
+
-      Animal(name: 'Зебра', description: 'Полосатая лошадь'),
+  @override
+  void initState() {
+    super.initState();
+    _animalsFuture = _fetchAnimals();
+  }
+  //Generics (можно использовать List<>)
+  Future<List<Animal>> _fetchAnimals() async {
+    // Future
+    await Future.delayed(const Duration(seconds: 2));
+
+    final animals = [
+      Animal(name: AnimalName.lion, description: 'King of the jungle'),
+      Animal(name: AnimalName.elephant, description: 'Largest land animal'),
+      Animal(name: AnimalName.giraffe, description: 'Animal with the longest neck'),
+      Animal(name: AnimalName.tiger, description: 'Big cat with striped fur'),
+      Animal(name: AnimalName.zebra, description: 'Striped horse'),
     ];
 
+    // Loops
+    for (var animal in animals) {
+      print(animal.printAnimal());
+    }
+
+    return animals;
+  }
+
+  @override
+  Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: const Text('Список животных'),
+        title: const Text('Animal List'),
       ),
-      body: ListView.builder(
+      body: FutureBuilder<List<Animal>>(
-        itemCount: animals.length,
+        future: _animalsFuture,
-        itemBuilder: (context, index) {
+        builder: (context, snapshot) {
-          return ListTile(
+          if (snapshot.connectionState == ConnectionState.waiting) {
-            title: Text(
+            return const Center(child: CircularProgressIndicator());
-              animals[index].name,
+          } else if (snapshot.hasError) {
-              style: const TextStyle(fontSize: 24), // Увеличиваем размер текста
+            return Center(child: Text('Error: ${snapshot.error}'));
-            ),
+          } else if (!snapshot.hasData || snapshot.data!.isEmpty) {
-            subtitle: Text(
+            return const Center(child: Text('No animals found.'));
-              animals[index].description,
+          } else {
-              style: const TextStyle(fontSize: 20), // Увеличиваем размер текста
+            final animals = snapshot.data!;
-            ),
+            return ListView.builder(
-          );
+              itemCount: animals.length,
+              itemBuilder: (context, index) {
+                return ListTile(
+                  title: Text(
+                    animals[index].name.toString().split('.').last,
+                    style: const TextStyle(fontSize: 34),
+                  ),
+                  subtitle: Text(
+                    animals[index].description,
+                    style: const TextStyle(fontSize: 26),
+                  ),
+                );
+              },
+            );
+          }
         },
       ),
     );