📘 Part 10 – Best Practices & Architecture in Flutter BLoC
🧱 1. Use a Clean Folder Structure
Organizing your code clearly improves maintainability. Here’s a suggested structure:
✅ Keep logic, data, and UI separate. Avoid putting everything in one file.
🧠 2. Prefer Cubit for Simple Logic
If your feature has:
-
A single state change trigger
-
No complex event handling
➡️ Use Cubit to keep it clean and minimal.
🔄 3. Use BLoC for Complex Flows
Use BLoC when:
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Multiple types of events must be handled
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You need strong separation of concerns
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Async operations like network calls are involved
🧪 4. Write Tests for Your BLoCs
📦 Add bloc_test to dev_dependencies:
✅ Example Test:
🔍 5. Use BlocObserver for Debugging
Track all BLoC state changes globally:
🚀 6. Integrate Dependency Injection
Avoid tightly coupling your BLoCs to services.
Use packages like:
-
get_it -
injectable
🧠 Summary: Best Practices
| Practice | Why it Matters |
|---|---|
| Use clean folder structure | Easier to scale and maintain |
| Prefer Cubit for simple logic | Less boilerplate, faster to implement |
| Use BLoC for event-heavy flows | Cleaner separation of logic |
| Write tests for BLoCs/Cubits | Avoid regressions and bugs |
| Use BlocObserver for debugging | Track issues in development |
| Inject dependencies properly | More modular and testable code |