RxJava setup

Before we move further, let's add the required libraries to your project. If you're using Android Studio, just add the following dependencies to the module build.gradle script:

dependencies {
    …
    compile 'io.reactivex:rxandroid:1.1.0'
    compile 'io.reactivex:rxjava:1.1.0'
}

rxjava is a library that implements the Reactive Extensions (http://reactivex.io/) on Java , and rxandroid is a library that adds classes to help write reactive components with RxJava in Android applications.