CostaFot

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // the URL we want to load
        val url = "https://media.giphy.com/media/cYxLgjZI5ezI2lrItX/giphy.gif"

        val circularProgressDrawable = createSpinner()

CostaFot

class MainViewModel : ViewModel() {

    private val compositeDisposableOnDestroy = CompositeDisposable()
    private var latestCatCall: Disposable? = null
    // the list that will be observed by the activity
    val bunchOfCats = MutableLiveData<List<NetCat>>()
    // the error message observed
    val errorMessage = MutableLiveData<String>()

    // the API call

CostaFot

class MainActivity : AppCompatActivity() {

    // Read the docs with detailed instructions to get your API key and endpoint!
    // https://docs.thecatapi.com/

    // public static fields in a companion object because im a horrible person
    companion object {
        // the server url endpoint
        const val serverUrl = "https://api.thecatapi.com/v1/"
        // this is where you declare your api key

CostaFot

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
// need this plugin to make this work
apply plugin: 'kotlin-kapt'

android {
   // your android stuff goes here
}

CostaFot

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

android {
   // your android stuff goes here
}

dependencies {
    // auto-generated dependencies

CostaFot

  override fun onPause() {
        compositeDisposableOnPause.clear()
        super.onPause()
    }

CostaFot

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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=".MainActivity">

    <Button
        android:id="@+id/button"

CostaFot

  override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        button.setOnClickListener {
            changeButtonText() 
        }
    }

CostaFot

 private fun changeButtonText() {
        compositeDisposableOnPause.add(
            Single.fromCallable {generateString()}
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe { textGenerated -> button.text = textGenerated }
        )
    }

CostaFot

 private fun generateString(): String {
        return "reddit"
    }