I merged these two project into one and fixed some bugs:
1. https://github.com/FaizMalkani/FloatingActionButton - only 4.3+
2. https://github.com/Quinny898/Floatin...nButton-Compat - I think is not completed or it need special instructions to use doesn't matter, it provides functions to work on 2.1+
Now in one, you have all goodies in one project. I fixed problem with preview so you can now see how it will look after build.
More info and instrucions: https://github.com/Marurban/FloatingActionButton
I want make it only jar file but dont have time now, probably I'll do it in coming week.