CostaFot

// RX Java
    implementation 'io.reactivex.rxjava2:rxandroid:2.1.0'
    implementation 'io.reactivex.rxjava2:rxjava:2.2.2'

    // Networking
    implementation "com.squareup.retrofit2:retrofit:2.4.0"
    implementation "com.squareup.retrofit2:adapter-rxjava2:2.4.0"
    implementation "com.squareup.retrofit2:converter-gson:2.4.0"
    implementation 'com.squareup.okhttp3:logging-interceptor:3.10.0'

CostaFot

open class Repository(
    baseUrl: String,
    isDebugEnabled: Boolean,
    apiKey: String
) {

    private val apiKeyHeader: String = "x-api-key"
    val retrofit: Retrofit

    init {

CostaFot

class CatsDataSource(retrofit: Retrofit) {

    private val api: CatsApi = retrofit.create(CatsApi::class.java)

    fun getNumberOfRandomCats(limit: Int, category_ids: Int?) =
        api.getNumberOfRandomCats(limit, category_ids)

    interface CatsApi {

        @GET("images/search")

CostaFot

/**
 * The class representing the Json response. Use http://www.jsonschema2pojo.org/ to get this.
 * Or you can add this plugin for AS here https://plugins.jetbrains.com/plugin/9960-json-to-kotlin-class-jsontokotlinclass-
 * It will create your data class from JSON to kotlin.
 */
data class NetCat(
    @SerializedName("id") val id: String,
    @SerializedName("url") val url: String,
    @SerializedName("breeds") val breeds: List<Any>,

CostaFot

/**
 * This guy extends Repository class so the retrofit variable will be available to use as it's instantiated in the init!
 */
class CatsRepository(
    baseUrl: String,
    isDebugEnabled: Boolean,
    apiKey: String
) : Repository(baseUrl, isDebugEnabled, apiKey) {

    private val catsDataSource: CatsDataSource = CatsDataSource(retrofit)

CostaFot

class MainActivity : AppCompatActivity() {

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

    // the server url endpoint
    private val serverUrl = "https://api.thecatapi.com/v1/"
    // this is where you declare your api key
    private val apiKey = "yourApiKeyHere"

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

@GlideModule
class GlideAppModule : AppGlideModule()

CostaFot

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

    <ImageView
        android:id="@+id/imageView"

CostaFot

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:dist="http://schemas.android.com/apk/distribution"
    package="com.yourpackagenamehere">

    <dist:module dist:instant="true" />
    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"