Don't worry, the docs don't lie. Those guys know what they are writing ;)
These font types are only available starting from Jellybean 4.1 and can be accessed as described here: http://developer.android.com/about/versions/android-4.1.html#Fonts
Frage
According to the Android Typography Design Guide, "The current TextView framework offers Roboto in thin, light, regular and bold weights". However, as far as I can tell, all that I can use as a developer is regular and bold. Am I missing something, or is that guide lying through its virtual teeth?
Lösung
Don't worry, the docs don't lie. Those guys know what they are writing ;)
These font types are only available starting from Jellybean 4.1 and can be accessed as described here: http://developer.android.com/about/versions/android-4.1.html#Fonts