What is Koin?

A pragmatic lightweight dependency injection framework for Kotlin developers.

Written in pure Kotlin, using functional resolution only: no proxy, no code generation, no reflection.

Koin is a DSL, a light container and a pragmatic API.

Get started Setup

// Add Jcenter to your repositories if needed
repositories {
    jcenter()    
}
dependencies {
    // Koin for Kotlin
    compile 'org.koin:koin-core:0.9.3'
}

// Add Jcenter to your repositories if needed
repositories {
    jcenter()
}
dependencies {
    // Koin for Android
    compile 'org.koin:koin-android:0.9.3'
    // or Koin for Android Architecture (if needed)
    compile 'org.koin:koin-android-architecture:0.9.3'
}

// Add Jcenter to your repositories if needed
repositories {
    jcenter()
}
dependencies {
    // Koin for SparkKotlin
    compile 'org.koin:koin-spark:0.9.3'
}

// Add Jcenter to your repositories if needed
repositories {
    jcenter()
}
dependencies {
    // Koin for Ktor
    compile 'org.koin:koin-ktor:0.9.3'
}

// Given some classes class Controller(val service : BusinessService) class BusinessService() // just declare it val myModule = applicationContext { bean { Controller(get()) } bean { BusinessService() } }

// use koin-android-architecture val module = applicationContext{ bean { BusinessService() } // Declare a ViewModel viewModel { MyViewModel(get())} } class MyViewModel(val service : BusinessService) : ViewModel() { // do antyhing with service instance } // Bind it to your Activity class MyActivity() : AppCompatActivity() { val viewModel MyViewModel : by viewModel() }

What is Koin?

Declare

Start

Inject