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AppInitializer.getInstance(context).initializeComponent(MyInitializer::class.java)

husaynhakeem

<manifest>
    <application>
        <provider
            android:name="androidx.startup.InitializationProvider"
            android:authorities="${applicationId}.androidx-startup"
            android:exported="false"
            tools:node="merge">

            <!-- Manually/Lazily run MyInitializer -->
            <meta-data

husaynhakeem

<manifest>
    <application>
        <provider
            android:name="androidx.startup.InitializationProvider"
            android:authorities="${applicationId}.androidx-startup"
            android:exported="false"
            tools:node="merge">

            <!-- Automatically runs FaceDetectorInitializer and CameraInitializer at app startup -->
            <meta-data

husaynhakeem

<manifest>
    <application>
        <provider
            android:name="androidx.startup.InitializationProvider"
            android:authorities="${applicationId}.androidx-startup"
            android:exported="false"
            tools:node="merge">

            <!-- Automatically run MyInitializer at app startup -->
            <meta-data

husaynhakeem

class FaceDetectorInitializer : Initializer<FaceDetector> {

    override fun create(context: Context): FaceDetector {
        val faceDetector = /* Set up and configure the face detector */
        return faceDetector
    }

    override fun dependencies() = listOf(CameraInitializer::class.java)
}

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class CameraInitializer : Initializer<Camera> {

    override fun create(context: Context): Camera {
        val camera = /* Set up, configure and/or initialize the camera */
        return camera
    }

    override fun dependencies() = emptyList<>()
}

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class MyInitializer: Initializer<MyDependency> {

    override fun create(context: Context): MyDependency {
        val myDependency: MyDependency = /* Run initialization/configuration logic */
        return myDependency
    }

    override fun dependencies(): List<Class<out Initializer<*>>> {
        return listOf(AnotherDependencyInitializer::class.java,
                      YetAnotherDependencyInitializer::class.java)

husaynhakeem

implementation "androidx.startup:startup-runtime:1.0.0-alpha01"

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@Test
fun shouldSendData() {
    val scenario = FragmentScenario.launchInContainer(FragmentB::class.java)

    // Register result listener
    var receivedData = ""
    scenario.onFragment { fragment ->
        fragment.parentFragmentManager.setFragmentResultListener(
            KEY,
            fragment,

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@Test
fun shouldReceiveData() {
    val scenario = FragmentScenario.launchInContainer(FragmentA::class.java)

    // Pass data using the parent fragment manager
    scenario.onFragment { fragment ->
        val data = bundleOf(KEY_DATA to "value")
        fragment.parentFragmentManager.setFragmentResult("aKey", data)
    }