flutter-dev

1# Flutter Development Guide
2 
3A practical guide for building cross-platform applications with Flutter 3 and Dart. Focuses on proven patterns, state management, and performance optimization.
4 
5## Quick Reference
6 
7### Widget Patterns
8 
9| Purpose | Component |
10|---------|-----------|
11| State management (simple) | `StateProvider` + `ConsumerWidget` |
12| State management (complex) | `NotifierProvider` / `Bloc` |
13| Async data | `FutureProvider` / `AsyncNotifierProvider` |
14| Real-time streams | `StreamProvider` |
15| Navigation | `GoRouter` + `context.go/push` |
16| Responsive layout | `LayoutBuilder` + breakpoints |
17| List display | `ListView.builder` |
18| Complex scrolling | `CustomScrollView` + Slivers |
19| Hooks | `HookWidget` + `useState/useEffect` |
20| Forms | `Form` + `TextFormField` + validation |
21 
22### Performance Patterns
23 
24| Purpose | Solution |
25|---------|----------|
26| Prevent rebuilds | `const` constructors |
27| Selective updates | `ref.watch(provider.select(...))` |
28| Isolate repaints | `RepaintBoundary` |
29| Lazy lists | `ListView.builder` |
30| Heavy computation | `compute()` isolate |
31| Image caching | `cached_network_image` |
32 
33## Core Principles
34 
35### Widget Optimization
36- Use `const` constructors wherever possible
37- Extract static widgets to separate const classes
38- Use `Key` for list items (ValueKey, ObjectKey)
39- Prefer `ConsumerWidget` over `StatefulWidget` for state
40 
41### State Management
42- Riverpod for dependency injection and simple state
43…