At this point, we have a solid framework on which we can build our further financial stock monitoring application. The means to display data are here along with some basic tools and libraries that will become useful as we develop the application.

In particular, we integrated the RxJava library into our code and tested that it works with a very simple Hello World example. Also, we've plugged in additional libraries, such as Butterknife, that will help us work with views with less effort.

Finally, the use of Retrolambda was enabled, which will let us write a much more concise and readable code in future.

However, it's not clear what exactly an Observable is. This is exactly what the next chapter will tackle!