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// DSL — now with compile-time auto-wiring
val appModule = module {
    single<Database>()
    single<UserRepository>()
    viewModel<MainViewModel>()
}

// Or Annotations — same power
@Singleton
class UserRepository(private val database: Database)

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val appModule = module {
    single { Database() }
    single { UserRepository(get()) }
    viewModel { MainViewModel(get()) }
}

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Koin

Overall Statistics Across All Sessions:
MainActivityViewModel: Avg = 0.166 ms, Min = 0.146 ms, Max = 0.198 ms, Standard Error ± 0.002 ms
ForYouViewModel: Avg = 2.052 ms, Min = 0.223 ms, Max = 9.042 ms, Standard Error ± 0.302 ms
AppStartup: Avg = 1416.360 ms, Min = 1204.000 ms, Max = 1746.000 ms, Standard Error ± 37.072 ms

--

Hilt

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// generated sources
import org.koin.ksp.generated.*


fun main(){
    startKoin {
        modules(CoffeeAppModule().module)
    }
}

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@Module
@ComponentScan("org.koin.sample.coffee")
class CoffeeAppModule

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@Single
class ElectricHeater : Heater

@Single
class Thermosiphon(private val heater: Heater) : Pump

@Single
class CoffeeMaker(private val pump: Pump, private val heater: Heater)

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val dataModule = module {
    // data components definitions
}
val featureModule1 = module {
    includes(dataModule)
    // feature1 definitions
}
val featureModule2 = module {
    includes(dataModule)
    // feature2 definitions

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class ClassA(val b : ClassB)
class ClassB()

module {
    singleOf(::ClassA)
    singleOf(::ClassB)
}

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class MyAdapter(val presenter : MyPresenter)

module {
  scope<MyActivity> {
    // get MyPresenter instance from current scope 
    scoped { MyAdapter(get()) }
    scoped { MyPresenter() }
  }
}

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class MyActivity : AppCompatActivity, AndroidScopeComponent {
    // use Activity Retained Scope
    override val scope : Scope by activityRetainedScope()
    val presenter : MyPresenter by inject()
}