AI agent skill · by @HoangNguyen0403

Android Di

Configure Hilt dependency injection with proper scoping, modules, and constructor injection in Android. Use when changing the production Hilt graph; defer test overrides, Room wiring, navigation-specific scopes, and generic DI explanations to their specific skills.

Archived 2026-10-23 · Source updated 2026-09-15 · License: MIT. Check the original repository for the latest version.

SKILL.md instructions

# Android Dependency Injection (Hilt)

## **Priority: P0 (CRITICAL)**

## 1. Bootstrap Hilt

- Annotate `Application` class with `@HiltAndroidApp`.
- Annotate Activities/Fragments with `@AndroidEntryPoint`.

See [module templates](references/files.md) for bootstrap and module examples.

## 2. Define Modules

- Use `@Binds` (abstract class) over `@Provides` when possible — generates smaller code.
- explicit with `@InstallIn` (`SingletonComponent`, `ViewModelComponent`).

See [module templates](references/files.md) for `@Binds` examples.

## 3. Prefer Constructor Injection

- Use `@Inject constructor(...)` over field injection.
- Use `@AssistedInject` for runtime parameters.

## Anti-Patterns

- **No Manual Dagger Components**: Use Hilt — it generates all wiring.
- **No Field Injection in Logic**: Use constructor injection; field injection only in Android framework classes.

## References

- [Module Templates](references/files.md)