Android screen sizes

For my own reference, but possibly interesting to others. 

Android screen sizes of note:

ldpi: small screens in low numbers
mdpi: range of sizes and quite popular
hdpi: most popular
xhdpi: very few devices

summary: must support normal screens at hdpi and mdpi densities.

See more at http://developer.android.com/resources/dashboard/screens.html

See also, the android guide to supporting multiple screen sizes.