This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
We did not cover mobile specifically in this edition, but plan a Chapter to cover mobile and another for TV in the next edition.
The good news, is the exact same code that you use for Desktop can also be used on mobile, but stick with the common profile classes.
You can run the JavaFX application in an emulator with NetBeans for JavaFX on Windows.