Flutter Mobile App Development - Flutter Mobile App Dev – Lec 06 SQLite Database Integration in Flutter - Building Offline-Ready Apps

Flutter Mobile App Development – Lecture 06: SQLite Database Integration in Flutter - Building Offline-Ready Apps 🎓 Course: Flutter Mobile App Development 👨‍🏫 Instructor: Dr. Abbas Malik 🏛 University: Prince Sultan University – College of Computer & Information Sciences 💡 Perfect for beginners in Flutter or anyone looking to strengthen their UI/UX layout skills in mobile development! 🔹 Course GitHub Repository: 📂 All course materials, code examples, and projects: https://github.com/mgmalik/flutterappdev What You'll Learn: Part 1: Understanding SQLite in Mobile Apps • What is SQLite? Lightweight, file-based relational database • Why use local databases in mobile applications • Offline functionality and fast data access • Structured relational data persistence • Perfect for: Offline apps, sensitive local data, sync-later workflows Part 2: SQLite vs. Other Storage Options • Comparison with SharedPreferences • When to choose SQLite over other solutions • Handling large local datasets • Working in remote/unstable environments Part 3: Flutter Database Packages Deep Dive • sqflite: The standard SQLite package for Flutter o Transactions and batch operations o Automatic version management o Background thread operations o Cross-platform support (Android, iOS, MacOS) • drift: Modern alternative with advanced features o Type safety and compile-time checks o Fluent Dart API instead of raw SQL o Excellent schema migration tools o Native web/desktop support • Comparison Table: Learning curve, type safety, boilerplate, runtime safety, complex queries, performance, reactive streams, schema migration, platform support Part 4: Building a Complete ToDo App with SQLite 📂 Database Design: text Tasks Table ├── id (INTEGER PRIMARY KEY) ├── content (TEXT) └── status (INTEGER - 0=pending, 1=completed) Part 5: Implementing CRUD Operations Model Class (Task.dart) • Creating a data model for database records • Mapping between objects and database rows DatabaseService Class (Full Implementation) • ✅ Initialize Database: Setup and version management • ✅ CREATE: Insert new tasks dart void addTasks(String content) async { final db = await database; await db.insert('tasks', { 'content': content, 'status': 0, }); } • ✅ READ: Retrieve all tasks dart Future List_of_Tasks getTasks() async { final db = await database; final data = await db.query('tasks'); return data.map((row) = Task.fromMap(row)).toList(); } • ✅ UPDATE: Modify task status dart void updateTaskStatus(int id, int status) async { final db = await database; await db.update( 'tasks', {'status': status}, where: 'id = ?', whereArgs: [id], ); } • ✅ DELETE: Remove tasks dart void deleteTask(int id) async { final db = await database; await db.delete('tasks', where: 'id = ?', whereArgs: [id]); } Part 6: Database Helper Methods • Opening/creating database • Version control and migrations • Connection management • Error handling best practices Part 7: Integrating with UI (HomePage) • Displaying tasks from database • Real-time updates with State Management • User interaction handling • Refresh mechanisms 🔹 Live Coding Demo: • Step-by-step database setup • Building the complete ToDo application • Testing CRUD operations in real-time • Debugging common database issues Packages Used: yaml dependencies: sqflite: ^2.3.0 # SQLite database path: ^1.9.0 # Database file path handling 🔹 Key Takeaways: • Master SQLite integration in Flutter • Build offline-first applications • Implement complete CRUD operations • Understand database versioning and migrations • Choose between sqflite and drift for your projects 🔹 Resources & References: • sqflite Package Documentation • drift Package Documentation • SQLite Official Site • Flutter Persistence Cookbook #Flutter #SQLite #Database #MobileDevelopment #sqflite #drift #CRUD #ToDoApp #OfflineFirst #FlutterTutorial #AppDevelopment #LocalDatabase #PersistentStorage #PSU #IS487 #CodingTutorial