Luca Bettelli
Luca has been an Android Engineer for over a decade, between Italy and Japan, always striving for clean, scalable, and maintainable Android apps. He's excited to share practical solutions with the Android community that helped shape his journey so far.
Mercari
Your job title –Software Engineer, Android
Session
Modern Android apps normally follow the Single-Activity architecture with Compose Navigation, but as screens grow complex with multiple UI components and ViewModels, we hit a fundamental limitation: there's no clean way to share dependencies at the screen level. Built-in Hilt scopes are either too broad (@Singleton, causing state leakage) or too narrow (@ViewModelScoped, preventing sharing).
This talk introduces a custom Dagger component that solves this gap with screen-scoped dependency injection that matches the screen lifecycle.
Key Takeaways
- Understand Hilt's component hierarchy limitations
- Learn how to build custom Hilt components and manage their lifecycle
- Implement screen-scoped dependency injection with a practical example
Perfect for developers already comfortable with Hilt/Dagger dependency injection, who hit this architectural wall and only found hacky solutions to work around it.