Learn FLUTTER with Real Code Examples
Updated Nov 17, 2025
Architecture
Widget tree -> Element tree -> RenderObject tree
Skia-powered rendering engine
Dart runtime with AOT/JIT compilation
Platform channels for native communication
Isolates for concurrent work
Rendering Model
Skia draws directly to screen
No reliance on OEM UI components
Pixel-perfect rendering pipeline
Architectural Patterns
MVVM-like widget architecture
State management via Provider/BLoC/GetX
Declarative widget rebuilding
Component-driven layouts
Real World Architectures
Fintech dashboard
E-commerce mobile app
Social media app
Enterprise workflow system
Design Principles
Everything is a widget
Declarative UI design
Fast iterations
Consistent cross-platform behavior
Scalability Guide
Use modular architecture
Split widgets into components
Avoid unnecessary rebuilds
Implement caching and isolates
Migration Guide
Upgrade to null safety
Migrate legacy layouts to modern widgets
Move from setState to structured state mgmt
Adopt new rendering and lifecycle patterns