Getting big payouts with Koin

on YouTube ↗36m

" summary

Demonstrates using Koin 2.0 as a Kotlin service-locator to wire an Android single-screen app: ViewModel with a repository and a user ID, repository built from a Room DAO (needs application context) and a Retrofit service (needs OkHttp and base URL). Shows modules, factory vs single, scoped lifecycles tied to screens, startKoin/global context and lazy viewModel injection, and overriding modules to supply mocked DAO/service for hermetic tests. Presents checkModules to validate runtime wiring (no compile-time guarantees) and reports the approach works and speeds test setup.

AI-written summary · about

" chapters (13)

1. 0:00Introduction to Koin
2. 3:48Service locators vs DI
3. 9:31Introducing Koin library
4. 13:50Global context and DSL
5. 16:42Setting up modules
6. 20:00Constructor injection
7. 23:12Singleton and efficiency
8. 24:15Retrieving dependencies
9. 25:18ViewModel integration
10. 27:01Passing parameters
11. 28:49Scoped dependencies
12. 31:17Testing with Koin
13. 33:23Compile safety

" related talks

• 36mInvesting in KoinRick Busarow · Kotlin/Everywhere Chicago 2019
• 47mAndroid Architecture Design with KoinArnaud Giuliani · Android Makers 2022
• 45mDependency Injection from Zero to HeroArnaud Giuliani · droidcon London 2019
• 39mInject your Jetpack Compose Application with KoinArnaud Giuliani · droidcon Berlin 2023
• 39mInject Basics!Jitin Sharma · droidCon Berlin 2019
• 41mMaking a Kotlin, Architecture Components, Rx and Coroutines sandwichFilip Babić · Mobilization 8
• 01h 03mLive App Architecture Debugging with Kotzilla & KoinArnaud Giuliani · droidcon Berlin 2025
• 41mAndroid, Compose, MP & Server - Inject them all with CoinArnaud Giuliani · droidcon New York 2024