Using Gradle

There are several automated build systems available, but the two most mainstream options are Gradle and Maven. Gradle is somewhat a successor to Maven and is especially the go-to build automation solution for Android development. If you are not familiar with Gradle and would like to learn how to use it, check out the Gradle Getting Started guide (https://gradle.org/getting-started-gradle-java/).

There are also several decent books that cover Gradle in varying degrees of depth, which you can find at https://gradle.org/books/. The following screenshot displays the The Central Repository page showing how to set up RxJava 2.0.2 for Gradle:

In your build.gradle script, ensure that you have declared mavenCentral() as one of your repositories. Type in or paste that dependency line compile 'io.reactivex.rxjava2:rxjava:x.y.z', where x.y.z is the version number you want to use, as shown in the following code snippet:

apply plugin: 'java'

sourceCompatibility = 1.8

repositories {
      mavenCentral()
}

dependencies {
      compile 'io.reactivex.rxjava2:rxjava:x.y.z'
}

Build your Gradle project and you should be good to go! You will then have RxJava and its types available for use in your project.