# Android Di

> Standards for Hilt Setup, Scoping, and Modules. Use when setting up Hilt dependency injection, component scoping, or modules in Android. (triggers: **/*Module.kt, **/*Component.kt, @HiltAndroidApp, @Inject, @Provides, @Binds)

- Skill: `comeonoliver/android-di` (Agent Skill)
- Install (CLI): `npx skillmds@latest add comeonoliver/android-di`
- Raw SKILL.md: https://api.skillmd.com/api/skills/comeonoliver/android-di/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: ComeOnOliver (https://skillmd.com/u/comeonoliver)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/comeonoliver/android-di

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# Android Dependency Injection (Hilt)

## **Priority: P0**

## Implementation Guidelines

### Setup

- **App**: Must annotate `Application` class with `@HiltAndroidApp`.
- **Entries**: Annotate Activities/Fragments with `@AndroidEntryPoint`.

### Modules

- **Binding**: Use `@Binds` (abstract class) over `@Provides` when possible (smaller generated code).
- **InstallIn**: Be explicit (`SingletonComponent`, `ViewModelComponent`).

### Construction

- **Constructor Injection**: Prefer over Field Injection (`@Inject constructor(...)`).
- **Assisted Injection**: Use for runtime parameters (`@AssistedInject`).

## Anti-Patterns

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

## References

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