Koin

https://insert-koin.io/docs

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Koin is a lightweight dependency injection framework for Kotlin that provides service locator...

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### Define and Start Koin with Compiler Plugin DSL

Source: https://insert-koin.io/docs/intro

Define your classes, modules using the Compiler Plugin DSL, and start Koin with the defined modules. Inject dependencies in your Activity using the `viewModel()` delegate.

```kotlin
class UserRepository(private val api: ApiService)
class UserViewModel(private val repository: UserRepository) : ViewModel()

val appModule = module {
    single<ApiService>()
    single<UserRepository>()
    viewModel<UserViewModel>()
}

startKoin {
    modules(appModule)
}

class MainActivity : AppCompatActivity() {
    private val viewModel: UserViewModel by viewModel()
}
```

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### Define and Start Koin with Annotations

Source: https://insert-koin.io/docs/intro

Define your classes with Koin annotations like `@Singleton` and `@KoinViewModel`. Define your module using `@Module` and `@ComponentScan` to auto-detect dependencies. This approach offers compile-time safety.

```kotlin
@Singleton
class UserRepository(private val api: ApiService)

@KoinViewModel
class UserViewModel(private val repository: UserRepository) : ViewModel()

@Module
@ComponentScan("com.myapp")
class AppModule
```

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