ThomasGorisse

    private void updateRegionNodes() {
        if (augmentedFace == null) {
            return;
        }

        Pose centerPose = augmentedFace.getCenterPose();

        faceRegionNode.setWorldPosition(new Vector3(centerPose.tx(), centerPose.ty(), centerPose.tz()));

        // Rotate the bones by 180 degrees because the .fbx template's coordinate system is

ThomasGorisse

IndirectLight buildIndirectLight() {
    Preconditions.checkNotNull(irradianceData, "\"irradianceData\" was null.");
    Preconditions.checkState(
        irradianceData.length >= FLOATS_PER_VECTOR,
        "\"irradianceData\" does not have enough components to store a vector");

    if (reflectCubemap == null) {
      throw new IllegalStateException("reflectCubemap is null.");
    }

ThomasGorisse

<uses-permission android:name="android.permission.CAMERA" />

<application>
    …
    <meta-data android:name="com.google.ar.core" android:value="optional" />
</application>

ThomasGorisse

val View.lifecycle get() = lifecycleOwner.lifecycle
val View.lifecycleScope get() = lifecycleOwner.lifecycleScope

ThomasGorisse

view.lifecycle.addObserver(onResume = {
    refreshData()
})

ThomasGorisse

texView.lifecycleScope.launchWhenCreated { // Launch on Dispatchers.Main
    val data = withContext(Dispatchers.IO) { // Dispatchers.IO for background task
        loadNetworkData() // Suspend function making http calls
    }
    texView.text = data // Dispatchers.Main for UI change
}

ThomasGorisse

textView.lifecycleScope.launchWhenCreated {
    while (isActive) {
        view.text = "${System.currentTimeMillis()}" // Dispatchers.Main
        withContext(Dispatchers.IO) { // Dispatchers.IO for waiting in background
            delay(1000) // Wait 1 second
        }
    }
}

ThomasGorisse

val lifecycle = findViewById(R.id.frameLayout).lifecycle
// Or
val imageView = ImageView(context)
imageView.lifecycleScope.launchWhenCreated {
    (imageView.parent as View).isVisible = true
    loadSlideShow(imageView.width, imageView.height)
}

ThomasGorisse

view.doOnResume {
    startWelcomeAnimation(view)
}
view.doOnPause {
    stopWelcomeAnimation(view)
}

ThomasGorisse

view.doOnDestroy {
    removeListener(view)
}