Using RxJava and RxAndroid

The primary feature of the RxAndroid library (https://github.com/ReactiveX/RxAndroid) is that it has Android schedulers to help your concurrency goals for your Android app. It has a Scheduler class for the Android main thread as well as an implementation that can target any message Looper class. Striving to be a core library, RxAndroid does not have many other features. You will need specialized reactive bindings libraries for Android to do more than that, which we will explore later.

Let's start simple. Let's execute the Android application that comes out of the box:

1. Select Run or Run 'MainActivity' from the Run menu:

2. If you have not created a virtual device to execute an Android application yet, the following screen will prompt you to create a virtual device:

3. Check Use same selection for future launches, if you are not going...