Android lacks proper support for custom typefaces. Most obvious method of defining typeface for UI elements via XML attributes is missing from default framework views.
android-typeface-helper makes it a lot easier to set custom typefaces from java code - one time initialization inside Application subclass and then applying custom typeface to all View's via typeface() static method call.
CustomType allows you to easily use different typfaces in your app. It was created to initially work with the Roboto family of fonts, but has since been adapted to allow you to use any typeface that you would like.
CustomType maintains static Typeface objects to avoid potential memory leaks that can occur. Hence, it is the ideal manner of using any custom typeface in your app, regardless of whether or not it belongs to the Roboto family.
Fontain is a lightweight library for displaying text in custom fonts in your Android applications
Fontain allows you to include a number of custom fonts within your app, and then access them by their Font Family, Weight, Width and Slope. It simplifies the process of selecting the proper typeface for any given usage.