вроде готовая лаба 2

lib/main.dart

@@ -1,6 +1,7 @@
 import 'dart:math';
-
 import 'package:flutter/material.dart';
+import 'task.dart';
+import 'taskManager.dart';
 
 void main() {
   runApp(const MyApp());
@@ -32,50 +33,73 @@ class MyHomePage extends StatefulWidget {
   State<MyHomePage> createState() => _MyHomePageState();
 }
 
+enum TaskPriority {
+  low,
+  medium,
+  high,
+}
+
+extension TaskPriorityExtension on TaskPriority {
+  String get displayName {
+    switch (this) {
+      case TaskPriority.low:
+        return 'Low';
+      case TaskPriority.medium:
+        return 'Medium';
+      case TaskPriority.high:
+        return 'High';
+    }
+  }
+}
+
 class _MyHomePageState extends State<MyHomePage> {
-  int _counter = 0;
   Color _color = Colors.orangeAccent;
 
-  void _incrementCounter() {
+  final TaskManager _taskManager = TaskManager();
+
+  void _addRandomTask() {
+    const priorities = TaskPriority.values;
+    final randomPriority = priorities[Random().nextInt(priorities.length)];
+    final newTask = Task('Task ${_taskManager.getTasks().length + 1}', randomPriority);
+    _taskManager.addTask(newTask);
     setState(() {
-      _counter++;
       _color = Color((Random().nextDouble() * 0xFFFFFF).toInt()).withOpacity(1.0);
     });
   }
 
   @override
   Widget build(BuildContext context) {
-
     return Scaffold(
       appBar: AppBar(
         backgroundColor: _color,
         title: Text(widget.title),
       ),
       body: Center(
-
         child: Column(
-
           mainAxisAlignment: MainAxisAlignment.center,
           children: <Widget>[
-            const Text(
+            Expanded(
-              'You have pushed the button this many times:',
+              child: SingleChildScrollView(
+                child: Column(
+                  children: <Widget>[
+                    for (var task in _taskManager.getTasks())
+                      Text(
+                        '${task.title} - Priority: ${task.priority.displayName}',
+                        style: const TextStyle(fontSize: 18),
+                      ),
+                  ],
+                ),
+              ),
             ),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headlineMedium,
-            ),
-            if (_counter > 10)
-              Text(
-                'Why are you clicking?',
-                style: Theme.of(context).textTheme.headlineMedium,
-              )
           ],
         ),
       ),
       floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
+        onPressed: () async {
+          _addRandomTask();
+          await _taskManager.simulateTaskProcessing();
+        },
         backgroundColor: _color,
-        tooltip: 'Increment',
         child: const Icon(Icons.add),
       ),
     );

lib/task.dart

@@ -0,0 +1,8 @@
+import 'main.dart';
+
+class Task {
+  final String title;
+  final TaskPriority priority;
+
+  Task(this.title, this.priority);
+}

lib/taskManager.dart

@@ -0,0 +1,18 @@
+import 'task.dart';
+
+class TaskManager {
+  final List<Task> _tasks = [];
+
+  void addTask(Task task) {
+    _tasks.add(task);
+  }
+
+  List<Task> getTasks() {
+    return _tasks;
+  }
+
+  Future<void> simulateTaskProcessing() async {
+    await Future.delayed(const Duration(seconds: 2));
+    print('Задание выполнено');
+  }
+}