name: Android Dependency Injection (Hilt) description: Standards for Hilt Setup, Scoping, and Modules metadata: labels: [android, di, hilt, dagger] triggers: files: ['/*Module.kt', '/*Component.kt'] keywords: ['@HiltAndroidApp', '@Inject', '@Provides', '@Binds']

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

• Component Manual Creation: **No Manual Dagger**: Use Hilt Standard.
• Field Inject in Logic: **No Field Inject**: Only in Android Components.

References

• Module Templates