Why I love Koin? (Droidcon Vienna 2019)

Dependency injection is a technique widely used in Android apps nowadays. It is not discussed that it allows developers to decouple components and make them more testable and modularized (and easy to maintain). But for the beginner, it could be difficult in a first approach. `Koin` is a library that makes it really easy and quick to set up, readable and really lightweight when it comes to compiling times.
In this talk, my intention is that the audience would run to their laptops and start using Koin straight away after it had finished (or something like that ;)). This talk is meant for beginners in their first contact with a Dependency Injection framework, and I will show the basics and some code examples of what they will find in the day-to-day work based on my own experience.

Transcript

1. Why I love Koin
2. Hola! @gemamsr Android Engineer en
4. “Coding is like playing a videogame”
5. Dependency injection
6. What is a dependency
7. What is a dependency A needs a method from B A depends on B A B
8. What is dependency injection A B A B
9. What is dependency injection
10. Types of dependency injection Constructor injection
11. Types of dependency injection Setter injection
12. Types of dependency injection Field injection
13. Advantages Testing More reusable More readable Easy switching
14. Advantages Makes you a happier developer
15. DI options for Android DIY Dagger Kodein Sam Edwards: DIY Dependency Injection with Kotlin Toothpick
16. Koin https://insert-koin.io/ 100% Kotlin DSL very intuitive Very light container API extremely easy
17. Setup
18. DSL KoinApplication DSL Module DSL
19. KoinApplication DSL
20. KoinApplication DSL
21. Module DSL
22. Module DSL
23. Module DSL
24. Module DSL Presenter Repository LocalDataSource RemoteDataSource HttpClient String
25. Module DSL
26. Module DSL
27. Dependency declaration
28. Dependency declaration
29. Dependency declaration
30. Dependency declaration
31. Qualifiers
32. Qualifiers
33. Multi-modules
34. Multi-modules
35. Multi-modules
36. Scopes
37. Scopes
38. Scopes
39. Scopes
40. Scopes
41. Scopes
42. Scopes
43. Scopes
44. Android arch support
45. Android arch support
46. Android arch support
47. Android arch support
48. Testing
49. Testing
50. Testing
51. Testing
52. Testing
53. Testing
54. Example Examples - Koin Documentation
55. Live coding?
56. Zeldapp app common detail search
57. Zeldapp Search Module SearchApi SearchRepository SearchUseCase SearchProcessor SearchViewModel SchedulerProvider
58. Zeldapp Detail Module DetailApi DetailRepository DetailUseCase DetailProcessor DetailViewModel SchedulerProvider
60. Thank you Disclaimer: No cucco was harmed during the talk preparation
61. Questions