🔧 🚀 Mengenal Database dan Local Storage di Flutter! 📱💾

dependencies:
  flutter:
    sdk: flutter
  sqflite: ^2.3.0
  path_provider: ^2.1.2
  path: ^1.8.3

import 'package:sqflite/sqflite.dart';
import 'package:path/path.dart';

class DatabaseHelper {
  static final DatabaseHelper instance = DatabaseHelper._init();
  static Database? _database;
  DatabaseHelper._init();

  Future<Database> get database async {
    if (_database != null) return _database!;
    _database = await _initDB('app.db');
    return _database!;
  }

  Future<Database> _initDB(String filePath) async {
    final dbPath = await getDatabasesPath();
    final path = join(dbPath, filePath);
    return await openDatabase(path, version: 1, onCreate: _createDB);
  }

  Future<void> _createDB(Database db, int version) async {
    await db.execute('''
      CREATE TABLE users (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        name TEXT NOT NULL
      )
    ''');
  }

  Future<int> insertUser(Map<String, dynamic> user) async {
    final db = await database;
    return await db.insert('users', user);
  }

  Future<List<Map<String, dynamic>>> getUsers() async {
    final db = await database;
    return await db.query('users');
  }
}

dependencies:
  shared_preferences: ^2.2.2

import 'package:shared_preferences/shared_preferences.dart';

class LocalStorage {
  Future<void> saveData(String key, String value) async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString(key, value);
  }

  Future<String?> getData(String key) async {
    final prefs = await SharedPreferences.getInstance();
    return prefs.getString(key);
  }
}