Inject Basics!
summary
Shows how to do dependency injection with raw Kotlin and a small Android app (dog photos, later cats) handling networking, storage and threading without a framework, then compares Dagger and Koin. Claims constructor injection for testable classes, notes activities need special handling, and warns Dagger generates code, forbids cycles and gives compile-time safety while forcing injected fields mutable. Notes Koin uses a module/bean registry, is easy to write and test but is runtime‑checked — Koin = service locator, Dagger = code generation with compile‑time safety.
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chapters (9)
- 0:00Introduction
- 1:29Dependency injection basics
- 8:08Service locator vs constructor injection
- 11:13Dagger framework overview
- 18:59Dagger Android introduction
- 27:00Pure inversion of control
- 29:04Koin dependency injection
- 35:23Do you need DI frameworks?
- 38:53Q&A
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