Koin Androidx Examples

This page provides an example of how Koin AndroidX Samples that utilize Koin for dependency injection can be built using Mill.

This example also showcases the support for Robolectric tests which are configured to run on the JVM and not on an Android device, allowing for faster test execution and easier debugging.

Create and configure an Android SDK module to manage Android SDK paths and tools.

build.mill (download, browse)
import mill.*, androidlib.*, kotlinlib.*

object androidSdkModule0 extends AndroidSdkModule {
  def buildToolsVersion = "35.0.0"
}

object examples extends mill.api.Module {
  object `androidx-samples` extends AndroidAppKotlinModule, AndroidR8AppModule {

    def kotlinVersion = "2.0.20"

    def androidSdkModule = mill.api.ModuleRef(androidSdkModule0)

    def androidCompileSdk = 35

    def androidMinSdk = 26

    def androidIsDebug = true

    override def androidDebugSettings: T[AndroidBuildTypeSettings] = Task {
      AndroidBuildTypeSettings(
        isMinifyEnabled = false
      )
    }

    def androidDefaultProguardFileNames: Task[Seq[String]] = Task.Anon {
      Seq("proguard-android-optimize.txt")
    }

    def androidApplicationId = "org.koin.sample.sandbox"

    def androidApplicationNamespace = "org.koin.sample.sandbox"

    def bomMvnDeps = Seq(
      mvn"io.insert-koin:koin-bom:4.1.1"
    )

    def mvnDeps: T[Seq[Dep]] = Seq(
      mvn"androidx.collection:collection-ktx:1.4.2".forceVersion(),
      mvn"androidx.savedstate:savedstate-ktx:1.3.1".forceVersion(),
      mvn"androidx.lifecycle:lifecycle-livedata-core-ktx:2.9.2".forceVersion(),
      mvn"androidx.arch.core:core-common:2.2.0".forceVersion(),
      mvn"androidx.constraintlayout:constraintlayout:2.2.1",
      mvn"androidx.work:work-runtime-ktx:2.10.1",
      mvn"io.insert-koin:koin-android",
      mvn"io.insert-koin:koin-core-coroutines",
      mvn"io.insert-koin:koin-androidx-workmanager",
      mvn"io.insert-koin:koin-androidx-navigation"
    )

    object test extends AndroidAppKotlinTests, TestModule.Junit4 {

      def androidIncludeAndroidResources = true

      def mvnDeps: T[Seq[Dep]] = Seq(
        mvn"androidx.arch.core:core-testing:2.2.0",
        mvn"junit:junit:4.13.2",
        mvn"io.insert-koin:koin-test-junit4",
        mvn"io.insert-koin:koin-android-test",
        mvn"io.insert-koin:koin-test-coroutines",
        mvn"androidx.test.ext:junit:1.2.1",
        mvn"androidx.test:runner:1.6.2",
        mvn"androidx.test.espresso:espresso-core:3.6.1",
        mvn"io.insert-koin:koin-test-junit4:1.4.1",
        mvn"org.robolectric:robolectric:4.14.1",
        mvn"androidx.test:core:1.6.1"
      )
    }
  }
}

Run the Robolectric tests on the JVM

> ./mill examples.androidx-samples.androidApk

> ./mill show examples.androidx-samples.test
...
{
  "msg": " ",
  "results": [
    {
      "fullyQualifiedName": "MainActivityTest.launch_view_2",
      "selector": "MainActivityTest.launch_view_2",
      "duration": ...,
      "status": "Success"
    },
    {
      "fullyQualifiedName": "MainActivityTest.launch_view",
      "selector": "MainActivityTest.launch_view",
      "duration": ...,
      "status": "Success"
    },
    {
      "fullyQualifiedName": "CheckModulesTest.Verify Module Configuration",
      "selector": "CheckModulesTest.Verify Module Configuration",
      "duration": ...,
      "status": "Success"
    }
  ]
}