What is Flutter?
What is Flutter?
About
- Flutter is an open-source UI software development kit by Google.
- Builds cross-platform apps from single codebase.
- Uses Dart programming language (optimized for UI).
- Implements reactive framework with widget-based architecture.
Main Topics
-
Cross-Platform Development
- Definition: Single codebase for multiple platforms.
- Example:
// Same code runs on: // - iOS // - Android // - Web // - Desktop
-
Widget-Based Architecture
- Definition: Everything is a widget.
- Example:
Center( child: Text('Hello World'), )
-
Dart Programming Language
- Definition: Optimized for UI development.
- Example:
void main() => runApp(MyApp());
-
Skia Rendering Engine
- Definition: High-performance graphics.
- Example:
// Renders directly to canvas CustomPaint( painter: MyPainter(), )
-
Native Performance
- Definition: Compiled to native code.
- Example:
// ARM binary output // No interpreter bridge
How to Use
- Development: Write once, deploy anywhere
- UI Building: Compose widgets
- Testing: Single test suite
- Deployment: Platform-specific bundles
How It Works
- Dart Code → Compiled to native
- Widget Tree → Rendered by Skia
- Platform Channels → Native interop
- Hot Reload → Stateful updates
Example App Structure:
void main() {
runApp(MaterialApp(
home: Scaffold(
body: Center(child: Text('Flutter')),
),
));
}
Conclusion
Flutter revolutionizes cross-platform development by combining high-performance rendering with a productive developer experience. Its widget-based architecture and single-codebase approach enable beautiful, native-quality applications across multiple platforms with unprecedented development speed.