플러터 Flutter 메모장 구현하기 Notepad

• 코드 작성

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

class Notepad extends StatefulWidget {
  @override
  _NotepadState createState() => _NotepadState();
}

class _NotepadState extends State<Notepad> {
  TextEditingController _textController = TextEditingController();
  String _filePath = '';

  @override
  void initState() {
    super.initState();
    _loadFile();
  }

  Future<void> _loadFile() async {
    final directory = await getApplicationDocumentsDirectory();
    _filePath = '${directory.path}/notepad.txt';
    final file = File(_filePath);
    if (await file.exists()) {
      final contents = await file.readAsString();
      setState(() {
        _textController.text = contents;
      });
    }
  }

  Future<void> _saveFile() async {
    final file = File(_filePath);
    await file.writeAsString(_textController.text);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Notepad'),
        actions: [
          IconButton(
            icon: Icon(Icons.save),
            onPressed: () async {
              await _saveFile();
              ScaffoldMessenger.of(context).showSnackBar(
                  SnackBar(content: Text('Note saved')));
            },
          ),
        ],
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: TextField(
          controller: _textController,
          maxLines: null,
          decoration: InputDecoration(
            hintText: 'Start typing here...',
            border: InputBorder.none,
          ),
        ),
      ),
    );
  }
}