Flutter To-Do List App Tutorial | CRUD Operations & SharedPreferences | Flutter Beginner Course Episode 5
━━━━━━━━━━━━━━━━━━━━
📖 Introduction
Welcome to Episode 5 of the FuzzuTech Flutter Beginner Course. In this tutorial, we will build a beautiful and modern To-Do List application completely from scratch using Flutter and Dart. This real-world project introduces one of the most important concepts in mobile application development—CRUD operations combined with local data persistence using SharedPreferences. Instead of creating a simple user interface, you'll learn how to build an application that stores user data permanently, updates instantly, and follows professional Flutter development practices.
Throughout this project, we'll design a premium Material 3 To-Do List application featuring beautiful task cards, floating action buttons, responsive layouts, progress tracking, empty state UI, task completion, editing, deleting, and offline storage. Every task remains available even after restarting the application, making this project feel like a real production-ready mobile application.
During the development process, you'll learn how StatefulWidget manages changing data, how setState() rebuilds the user interface instantly, how ListView.builder efficiently displays dynamic content, and how SharedPreferences stores application data locally. You'll also understand JSON serialization using jsonEncode() and jsonDecode(), allowing Flutter objects to be converted into storable data and restored whenever the application starts again.
The application follows Google's latest Material 3 design language with premium cards, rounded corners, soft shadows, responsive layouts, beautiful typography, modern spacing, and an attractive light theme. The project structure is designed to be beginner-friendly while following clean coding practices that professional Flutter developers use in real-world applications.
Whether you want to become a Flutter developer, Android application developer, iOS developer, or improve your Dart programming skills, this project provides a strong foundation for building data-driven applications. By completing this tutorial, you'll understand CRUD operations, local storage, JSON, responsive UI development, and Flutter state management—skills that are required in almost every professional Flutter application.
━━━━━━━━━━━━━━━━━━━━
✨ Features
✅ Modern Material 3 UI Design
✅ Beautiful Premium Light Theme
✅ Fully Responsive Layout
✅ Add New Tasks
✅ Edit Existing Tasks
✅ Delete Tasks
✅ Mark Tasks as Completed
✅ Pending & Completed Tasks
✅ Beautiful Task Cards
✅ Floating Action Button
✅ AlertDialog Input Form
✅ TextField User Input
✅ ListView.builder Implementation
✅ StatefulWidget
✅ setState() State Management
✅ CRUD Operations
✅ SharedPreferences Local Storage
✅ JSON Serialization
✅ jsonEncode() & jsonDecode()
✅ Offline Data Persistence
✅ Automatic Save After Changes
✅ Automatic Load After Restart
✅ Task Progress Tracking
✅ Statistics Dashboard
✅ Empty State Illustration
✅ Professional Typography
✅ Rounded Material Cards
✅ Soft Shadows & Elevation
✅ Beginner-Friendly Flutter Project
✅ Clean Flutter Architecture
✅ Organized Project Structure
✅ Android Ready
✅ iOS Ready
✅ Flutter Web Compatible
✅ Desktop Compatible
✅ Production-Level Flutter UI
✅ Real-World Flutter Project
✅ Step-by-Step Explanation
━━━━━━━━━━━━━━━━━━━━
🎥 Demo Video
Watch the complete Flutter To-Do List App tutorial below and learn how to build a professional offline task management application using CRUD operations, SharedPreferences, Material 3 UI, JSON serialization, ListView.builder, StatefulWidget, and responsive Flutter design from scratch.
━━━━━━━━━━━━━━━━━━━━
🛠 Technologies Used
• Flutter
• Dart Programming Language
• Material 3 Design
• StatefulWidget
• setState()
• ListView.builder
• SharedPreferences
• JSON Serialization
• jsonEncode()
• jsonDecode()
• AlertDialog
• FloatingActionButton
• TextField
• Checkbox
• Card Widget
• Container Widget
• Column Widget
• Row Widget
• Expanded Widget
• Responsive Layout
• Flutter Widgets
• Local Storage
• Data Persistence
• Mobile Application Development
• Android Development
• iOS Development
• Flutter Best Practices
• Professional Flutter Architecture
━━━━━━━━━━━━━━━━━━━━
🔍 How Flutter To-Do List App Works
The Flutter To-Do List application starts when Flutter executes the main() function. This function acts as the entry point of the application and launches the widget tree using the runApp() method.
The MaterialApp widget initializes the application while enabling Material 3 design, application theme, navigation configuration, typography, and responsive user interface styling.
After initialization, Flutter loads the main To-Do List screen where users can manage all their daily tasks.
The application is built using a StatefulWidget, allowing the interface to rebuild automatically whenever task information changes.
Unlike StatelessWidget, StatefulWidget stores mutable data, making it ideal for applications where users continuously add, edit, complete, and delete information.
All tasks are stored inside a Dart List, where each task is represented using a custom Task model containing information such as title, description, completion status, and creation details.
Whenever the user taps the Floating Action Button, Flutter opens an AlertDialog containing input fields for creating a new task.
Users enter task information using TextField widgets connected to TextEditingControllers, allowing Flutter to capture user input efficiently.
After pressing the Save button, Flutter validates the entered information and creates a new Task object.
The new Task object is immediately inserted into the task list, and the application calls setState() to rebuild the interface.
Flutter automatically refreshes only the affected widgets instead of rebuilding the complete application, resulting in smooth performance.
The task list is displayed using ListView.builder, which efficiently creates widgets only for visible items on the screen.
Each task appears inside a beautiful Material 3 Card containing the task title, completion checkbox, edit button, and delete button.
Whenever the completion checkbox changes, Flutter updates the corresponding task object and instantly refreshes the interface.
Users can modify existing tasks using the Edit button, which opens the same AlertDialog pre-filled with the current task information.
Deleting a task removes it from the list immediately, and the user interface updates without restarting the application.
To permanently store all tasks, the application uses SharedPreferences.
Since SharedPreferences only supports primitive data types, every Task object is first converted into JSON using the jsonEncode() function.
The encoded JSON string is then saved locally inside the device's storage.
Whenever the application starts again, Flutter retrieves the saved JSON string from SharedPreferences.
Using jsonDecode(), Flutter converts the JSON back into Dart objects and recreates every saved task.
This process allows all user tasks to remain available even after completely closing or restarting the application.
Material 3 components, responsive layouts, modern cards, beautiful spacing, soft shadows, premium typography, and clean color combinations create a professional user experience across Android phones, iPhones, tablets, desktop devices, and Flutter Web.
This project demonstrates how Flutter combines StatefulWidget, setState(), ListView.builder, CRUD operations, SharedPreferences, JSON serialization, responsive layouts, and Material 3 design principles to build modern offline applications while maintaining clean, scalable, and production-ready source code.
━━━━━━━━━━━━━━━━━━━━
📸 Screenshots
Below are some screenshots of the completed Flutter To-Do List application. These images demonstrate the modern Material 3 user interface, beautiful task cards, responsive layouts, local storage implementation, CRUD operations, statistics dashboard, and premium light theme.
━━━━━━━━━━━━━━━━━━━━
📚 Step-by-Step Tutorial
Step 1 — Install Flutter SDK and configure your development environment.
Step 2 — Create a new Flutter project.
Step 3 — Open the project inside Visual Studio Code or Android Studio.
Step 4 — Understand the Flutter project structure.
Step 5 — Configure Material 3 inside MaterialApp.
Step 6 — Create the main StatefulWidget.
Step 7 — Design the Scaffold layout.
Step 8 — Create the Material 3 AppBar.
Step 9 — Build beautiful statistics cards.
Step 10 — Create the progress indicator section.
Step 11 — Design responsive task cards.
Step 12 — Add ListView.builder for displaying tasks.
Step 13 — Create the Floating Action Button.
Step 14 — Design the Add Task AlertDialog.
Step 15 — Capture user input using TextField.
Step 16 — Implement CRUD Create operation.
Step 17 — Implement CRUD Read operation.
Step 18 — Implement CRUD Update operation.
Step 19 — Implement CRUD Delete operation.
Step 20 — Mark tasks as completed using Checkbox.
Step 21 — Build the Task Model class.
Step 22 — Convert Task objects using jsonEncode().
Step 23 — Restore Task objects using jsonDecode().
Step 24 — Save tasks using SharedPreferences.
Step 25 — Load saved tasks during app startup.
Step 26 — Update the interface using setState().
Step 27 — Improve spacing, colors, and typography.
Step 28 — Make the UI fully responsive.
Step 29 — Test the application on Android, iOS, Desktop, and Flutter Web.
Step 30 — Complete the Flutter To-Do List App and prepare for API integration in Episode 6.
━━━━━━━━━━━━━━━━━━━━
💻 Full Source Code Available on GitHub 👇
🔗 View Full Flutter To-Do List App Source Code on GitHub
━━━━━━━━━━━━━━━━━━━━
⚠️ Educational Notice
This Flutter To-Do List App project is created strictly for educational purposes to help beginners learn Flutter development, Dart programming, CRUD operations, SharedPreferences, JSON serialization, Material 3 UI design, responsive layouts, and real-world mobile application development.
The source code is intended for learning modern Flutter development practices and should not be used for malicious activities or redistributed without following the applicable license of the project.
This tutorial demonstrates how Flutter widgets interact with local storage to build responsive, interactive, and offline-first applications using clean architecture and reusable components.
Although this project stores data locally using SharedPreferences, larger production applications generally use SQLite, Hive, Isar, Firebase, or REST APIs depending on project requirements.
Feel free to improve this application by adding categories, due dates, reminders, notifications, dark mode, search functionality, cloud synchronization, Firebase Authentication, or advanced state management solutions such as Provider, Riverpod, Bloc, or GetX as your Flutter skills continue to grow.
FuzzuTech and the developer are not responsible for any issues resulting from modifying, distributing, or using this project in production environments without proper testing.
━━━━━━━━━━━━━━━━━━━━
🎯 Conclusion
Congratulations! You have successfully built your first complete Flutter To-Do List application using Material 3 design principles and CRUD operations.
Throughout this project, you learned how StatefulWidget manages changing data, how setState() rebuilds the interface instantly, how ListView.builder efficiently displays dynamic data, and how SharedPreferences permanently stores information on the device.
You also explored CRUD operations, Task Models, JSON serialization using jsonEncode() and jsonDecode(), responsive layouts, reusable widgets, clean project organization, and professional Flutter development practices commonly used in real-world applications.
This project provides a strong foundation for developing offline Flutter applications and prepares you for connecting Flutter apps with real-world APIs and online services.
In the next episode of this Flutter Beginner Course, we'll build a beautiful Live Weather Application while learning HTTP requests, REST APIs, JSON parsing, Future, async/await, FutureBuilder, loading states, error handling, and real-time weather updates using a professional Weather API.
If you enjoy Flutter tutorials, Dart programming, mobile app development, Android development, iOS development, Material 3 UI design, and real-world Flutter projects, subscribe to FuzzuTech and continue your Flutter development journey with us.
━━━━━━━━━━━━━━━━━━━━
🛒 Recommended for Flutter Developers
🚀 Improve your Flutter development experience with these recommended products:
👉 Mechanical Keyboard – YOUR_AFFILIATE_LINK
👉 Wireless Mouse – YOUR_AFFILIATE_LINK
👉 Laptop Stand – YOUR_AFFILIATE_LINK
👉 USB-C Hub – YOUR_AFFILIATE_LINK
👉 Flutter Development Laptop – YOUR_AFFILIATE_LINK
━━━━━━━━━━━━━━━━━━━━
❤️ Thank You for Reading
Thank you for following this Flutter Beginner Course Episode 5.
If this tutorial helped you learn Flutter, don't forget to Like 👍, Share 📤, Comment 💬, and Subscribe 🔔 to FuzzuTech for more professional Flutter projects, Dart tutorials, mobile application development videos, and complete programming courses.
See you in Episode 6, where we'll build a beautiful Live Weather App using a real Weather API while learning HTTP Requests, REST APIs, JSON Parsing, Future, async/await, and FutureBuilder.
— FuzzuTech ❤️
━━━━━━━━━━━━━━━━━━━━
Comments
Post a Comment