Taken from Mark Murphy’s answer on the Android Developers mailing list:
http://developer.android.com/reference/android/graphics/Typeface.html
There are only three fonts: normal
(Droid Sans), serif (Droid Serif), and
monospace (Droid Sans Mono).While there may be additional fonts
buried in WebKit somewhere, they
appear to be inaccessible to
developers outside of WebKit. 🙁The only other fonts are any TrueType ones you bundle with your application.
Edit: Roboto is a new font which came in with Android 4.0. You can use this library project to use it in all versions back to API level 4 https://github.com/mcalliph/roboto-text-view