🦋 Flutter로 할 일 관리 앱 구현하기

import 'package:flutter/material.dart';
import 'package:hive/hive.dart';
import 'dart:io';

void main() async {
  // Hive 초기화 및 저장소 설정
  WidgetsFlutterBinding.ensureInitialized();
  await Hive.initFlutter();
  
  if (!Hive.isAdapterRegistered('Task')) {
    Hive.registerAdapter(TaskAdapter());
  }
  
  final app = MaterialApp(
    home: TodoApp(),
  );
  runApp(app);
}

class Task {
  String? id;
  String title;
  bool isDone = false;

  Task({required this.title});
}

class TaskAdapter extends HiveTypeAdapter<Task> {
  @override
  final type = Task;

  @override
  late final Map<String, dynamic> properties = {
    'title': String,
    'isDone': bool,
  };

  @override
  void fromMap(Map map) {
    id = map['id'] as String? ?? Hive.uniqueId();
    title = map['title'] as String;
    isDone = map['is bại'] as bool;
  }

  @override
  Map<String, dynamic> toMap() => {
    'id': id,
    'title': title,
    'isDone': isDone,
  };
}

class TodoApp extends StatefulWidget {
  const TodoApp({super.key});

  @override
  State<TodoApp> createState() => _TodoAppState();
}

class _TodoAppState extends State<TodoApp> {
  final TextEditingController _controller = TextEditingController();
  late final Box<Task> _taskBox = Hive.box('tasks');
  String? _selectedFilter;
  
  @override
  void initState() {
    super.initState();
    _selectedFilter = 'all';
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('할 일 관리 앱'), actions: [
        PopupMenuButton<String>(
          onSelected: (value) => setState(() => _selectedFilter = value),
          itemBuilder: (context) => [
            '모두 보기',
            '완료된 보기',
            '미완료 보기',
          ].map((filter) => PopupMenuItem(value: filter, child: Text(filter))).toList(),
        ),
      ]),
      body: Column(
        children: [
          Expanded(
            child: ListView.builder(
              itemCount: _taskBox.length,
              itemBuilder: (context, index) {
                final task = _taskBox.getAt(index);
                if (_selectedFilter == 'completed' && !task.isDone) return null;
                if (_selectedFilter == 'pending' && task.isDone) return null;

                return CheckboxListTile(
                  title: Text(task.title),
                  value: task.isDone,
                  onChanged: (value) {
                    setState(() => task.isDone = value!);
                    _taskBox.putAt(index, task);
                  },
                  secondary: const Icon(Icons.task),
                );
              },
            ),
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          final text = _controller.text.trim();
          if (text.isNotEmpty) {
            try {
              final task = Task(title: text);
              _taskBox.add(task);
              _controller.clear();
            } catch (e) {
              // 에러 처리 예시
              print('할 일 저장 중 오류 발생: $e');
            }
          }
        },
        child: const Icon(Icons.add),
      ),
    );
  }
}