tpakis

enum class ABTestVariation(val navGraphRes: Int) {
    BASELINE(R.navigation.baseline_navigation),
    VARIATION1(R.navigation.variant1_navigation),
    VARIATION2(R.navigation.variant2_navigation),
}

private val abTestVariation: ABTestVariation by lazy {
    intent?.getSerializableExtra(KEY) as? ABTestVariation ?: ABTestVariation.BASELINE
}

tpakis

<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/baseline_navigation"
    app:startDestination="@id/step1Fragment">

    <fragment
        android:id="@+id/step1Fragment"
        android:name="com.example.abnavigationexample.ui.abtest.fragments.Step1Fragment"

tpakis

<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/baseline_navigation"
    app:startDestination="@id/step1Fragment">

    <fragment
        android:id="@+id/step1Fragment"
        android:name="com.example.abnavigationexample.ui.abtest.fragments.Step1Fragment"

tpakis

private fun handleNavigationEvent(nextStep: Int?) {
     if (nextStep != null) {
            try {
                navController.navigate(R.id.next, bundleOf(STEP_BUNDLE_KEY to nextStep))
                // if there is no next step then finish
            } catch (e: IllegalArgumentException) {
                finish()
            }
        }
}

tpakis

class CustomCrashHandler(
    private val defaultHandler: Thread.UncaughtExceptionHandler? = null,
    applicationContext: Context
) : Thread.UncaughtExceptionHandler {

    private val chuckerCollector: ChuckerCollector by lazy {
        ChuckerCollector(
            context = applicationContext,
            // Toggles visibility of the push notification
            showNotification = true,

tpakis

class App: Application() {
    override fun onCreate() {
        super.onCreate()
        setupChuckerErrors()
    }

    private fun setupChuckerErrors() {
        if (BuildConfig.DEBUG) {
            val systemHandler = Thread.getDefaultUncaughtExceptionHandler()
            Thread.setDefaultUncaughtExceptionHandler(CustomCrashHandler(systemHandler, this))

tpakis

class DebouncingOnClickListener(
    private val intervalMillis: Long,
    private val doClick: ((View) -> Unit)
) : View.OnClickListener {

    override fun onClick(v: View) {
        if (enabled) {
            enabled = false
            v.postDelayed(ENABLE_AGAIN, intervalMillis)
            doClick(v)

tpakis

fun View.setOnCLick(intervalMillis: Long = 0, doClick: (View) -> Unit) =
    setOnClickListener(DebouncingOnClickListener(intervalMillis = intervalMillis, doClick = doClick))

// use it like this
my_button.setOnCLick(intervalMillis = 500) {
    // Do stuff
}

// or this
my_button.setOnCLick {

tpakis

fun <T : View> Activity.bindView(@IdRes res: Int): Lazy<T> {
    @Suppress("UNCHECKED_CAST")
    return lazy(LazyThreadSafetyMode.NONE) { findViewById<T>(res) }
}

fun <T : View> View.bindView(@IdRes res: Int): Lazy<T> {
    @Suppress("UNCHECKED_CAST")
    return lazy(LazyThreadSafetyMode.NONE) { findViewById<T>(res) }
}

tpakis

class MainActivity : AppCompatActivity() {

    private val buttonBaseline: Button by bindView(R.id.button_go_to_baseline)

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        buttonBaseline.setOnClickListener {
            goToABTest(ABTestVariation.BASELINE)
        }