Android developers who are interested in flat UI (but feel that the Flat UI Kit from CengaLabs may be overkill for their purposes) may find a lighter solution in FButton, a flat button UI library from Le Van Hoang. It's straightforward and customizable, allowing developers to create modern-looking buttons with a variety of styles. Hoang provides a few examples on GitHub:
You can find everything you need - code, examples, usage instructions, etc. - on GitHub, as well as a demo app on the Play Store.