Flutter Documentation

This guide introduces Flutter mobile development fundamentals, focusing on concepts and best practices for developers using the Codeunia Learn platform.

Overview

Flutter is Google's UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase. It uses Dart language and provides fast development with hot reload.

Flutter Fundamentals

Widgets

Building blocks of UI. Stateless for static, Stateful for dynamic.

Dart Language

Object-oriented with async support. Similar to JavaScript but typed.

Material Design

Design system for consistent UI. Cupertino for iOS style.

App Structure

main.dart entry point. lib/ for code, pubspec.yaml for dependencies.

State Management

Provider, Riverpod, Bloc for complex apps.

Navigation

Navigator for screen transitions.

Packages

Pub.dev for third-party libraries.

Best Practices

Use keys for widgets, optimize builds, and test with Flutter Driver.

Testing

Unit, widget, integration tests.

Performance Optimization

Profile with DevTools, use const constructors.

Deployment

Build APKs/IPAs, deploy to stores.

Resources and References

• Flutter Documentation
• Dart Language
• Pub.dev

Troubleshooting

Common issues include layout overflows, state not updating. Use DevTools.

Development Setup

Install Flutter SDK, Android Studio/VS Code, and emulators.