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Dagger Hilt Pros and Cons - Android Summit 2020
- 1. Dagger Hilt: Live Demo, Pros and Cons Vasiliy Zukanov Android developer and instructor Twitter: VasiliyZukanov Site: TechYourChance.com
- 2. @VasiliyZukanov 2 Questions after the session in Zoom, or on Twitter @VasiliyZukanov (next 24 hours)
- 3. Dagger – DI framework by Square Dagger 2 – DI framework by Google dagger.android – extension of Dagger 2 by Google Hilt – abstraction over Dagger 2 by Google @VasiliyZukanov 3 History of Dagger
- 4. Migrate the tutorial app from Dagger 2 to Hilt Discuss Hilt’s pros and cons Should you adopt or refactor to Hilt right now? Future predictions (also known as “conspiracies”) My stuff (if time permits) @VasiliyZukanov 4 Our plan for today
- 5. @VasiliyZukanov 5 Tutorial App Review https://github.com/techyourchance/android_summit_2020_tutorial
- 6. Activities and Fragments Application Scope Activity Scope Presentation Scope or Controller Scope (unscoped) AppComponent AppModule ActivityComponent ActivityModule PresentationComponent PresentationModule ViewModelModule
- 7. @VasiliyZukanov 7 Migration from Dagger 2 to Hilt It’ll be very quick, so don’t fixate on the details
- 8. Activities and Fragments Application Scope Activity Scope Presentation Scope or Controller Scope (unscoped) SingletonComponent AppModule ActivityComponent ActivityModule @AndroidEntryPoint @InstallIn @InstallIn
- 9. Hilt Pros and Cons @VasiliyZukanov 9 Cons: • Hilt requires additional annotation processor • Yet another annotation processor for ViewModel handling • Complexity leaks in non-trivial cases (e.g. FragmentFactory) • Gradle plugin (optional) • Immaturity Pros: • Better conventions than dagger.android • Simpler handling of ViewModels and SavedStateHandle • Standardization • Simpler integration, UI and E2E testing * • Better documentation **
- 10. @VasiliyZukanov 10 Do you need to migrate to Hilt? To me, Hilt doesn’t provide any benefits at this point… …but I never adopted dagger.android…
- 11. @VasiliyZukanov 11 If Hilt doesn’t bring new capabilities, why Google pushes it so hard? *speculation (conspiracy) warning* IMO, 50%+ probability that Hilt will support KMP projects
- 12. @VasiliyZukanov 12 If you’re interested in professional-grade Android development content… www.TechYourChance.com
- 13. Thank you!