Design Guidelines cover
Android mobile design guidelines
Android device design guidelines
Android device design guidelines
Android device design guidelines
Android device design guidelines
OmniGraffle, Adobe Illustrator, Specctr Pro

Design guidelines for specially designed for Android tablet and phone apps. Android device has various screen dimensions, and the developers aren’t (cannot) aware of “pixel” so that I decided to use “unit” as a language between designers and developers. The benchmark of 100% size is medium density-independent pixel (mdpi).