android-di

name	android-di
description	Configure Hilt dependency injection with proper scoping, modules, and constructor injection in Android. Use when setting up Hilt DI, component scoping, or defining modules. (triggers: **/*Module.kt, **/*Component.kt, @HiltAndroidApp, @Inject, @Provides, @Binds)

Android Dependency Injection (Hilt)

Priority: P0

1. Bootstrap Hilt

• Annotate Application class with @HiltAndroidApp.
• Annotate Activities/Fragments with @AndroidEntryPoint.

See module templates for bootstrap and module examples.

2. Define Modules

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

See module templates 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 the wiring.
• No Field Injection in Logic: Use constructor injection; field injection only in Android framework classes.

References

• Module Templates