Getting started with dagger 2
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Fast dependency injection for Android applications. Check my samples out: https://github.com/rodrigohenriques/android-mvp-clean-architecture https://github.com/rodrigohenriques/Dagger-2-Sample Linkedin: https://br.linkedin.com/in/henriquesrodrigo
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Getting started with dagger 2
- 1. Getting Started with Dagger 2 Fast dependency injection for Android applications
- 2. Why dependency injection? Separation of concerns Testability Every app has some kind of dependency injection
- 3. Uncle Bob “Depend upon Abstractions. Do not depend upon concretions.”
- 4. A brief history of time JSR-330 Guice Dagger
- 6. Dagger 2 Maintained by Java Core Libraries team at Google Faster than Guice and Dagger Easy to use and to debug Mobile first
- 8. Dagger API @Modules + @Provides @Inject @Component
- 10. Requesting Dependencies @Inject annotations required Constructor, Field & Method
- 11. Constructor Injection @Inject on a single constructor Parameters are dependencies They can be stored in private and final fields
- 15. Dependency Graph EpisodeRepository DataModule#provideEpisodeRepository RemoteEpisodeRepository TraktvApi DataModule#provideTraktvApi OmdbApi DataModule#provideOmdbApi Constructor Injection
- 16. Field Injection @Inject on fields for dependencies Field can not be private or final Inject happens after object is fully instantiated Object is usually responsible for injection
- 17. Method Injection
- 20. Components Bridge between modules and injections The injector
- 21. Components
- 22. Components this notation is optional
- 23. Components
- 24. Components
- 25. How about some live coding?
- 27. Questions?