wellingtoncosta

suspend fun doSomeHeavyOperation() {
  // do some non blocking operation
}

wellingtoncosta

fun main() {
  GlobalScope.launch {
    val payments = fetchLastPayments()
    processPayments(payments)
  }
}

wellingtoncosta

class FragmentTwo : Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.fragment_fragment_two, container, false).apply {
            this.back_to_fragment_one.setOnClickListener {
                RxBus.instance.publish(MAIN_ACTIVITY_SUBJECT, FRAGMENT_ONE_TAG)
            }

wellingtoncosta

class FragmentOne : Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.fragment_fragment_one, container, false).apply {
            this.go_to_fragment_two.setOnClickListener {
                RxBus.instance.publish(MAIN_ACTIVITY_SUBJECT, FRAGMENT_TWO_TAG)
            }

wellingtoncosta

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        observeEvents()
        RxBus.instance.publish(MAIN_ACTIVITY_SUBJECT, FRAGMENT_ONE_TAG)
    }

    private fun observeEvents() {

wellingtoncosta

class RxBus private constructor() {

    private val subjects = HashMap<String, PublishSubject<Any>>()
    private val subscriptions = HashMap<Any, CompositeDisposable>()

    private fun subject(key: String) = subjects.getOrPut(key) { PublishSubject.create() }

    private fun disposable(key: Any) = subscriptions.getOrPut(key) { CompositeDisposable() }

    fun subscribe(subject: String, owner: Any, action: (Any) -> Unit) {

wellingtoncosta

class FragmentOne : Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.fragment_fragment_one, container, false).apply {
            this.go_to_fragment_two.setOnClickListener {
                RxBus.instance.publish(FRAGMENT_TWO_TAG)
            }

wellingtoncosta

class FragmentTwo : Fragment() {

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.fragment_fragment_two, container, false).apply {
            this.back_to_fragment_one.setOnClickListener {
                RxBus.instance.publish(FRAGMENT_ONE_TAG)
            }

wellingtoncosta

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        observeEvents()
        RxBus.instance.publish(FRAGMENT_ONE_TAG)
    }

    private fun observeEvents() {

wellingtoncosta

<androidx.constraintlayout.widget.ConstraintLayout
        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:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".ui.FragmentTwo">

    <com.google.android.material.appbar.AppBarLayout
            android:id="@+id/appbar_fragment_two"