Standard image for the Android back\up button
Android UI guidelines http://developer.android.com/design/downloads/index.html provide a back button image download but the button appears to be a bit different from the one used in the action bar. The stencil for the action bar "back/up" is not available in the Android stencils. Does anyone know if there is standard "back/up" button resource or each app is responsible for creating it's own (opens door for less consistency)? Or does the back button comes automatically with action bar?
The SDK contains an icon called "ic_ab_back_holo_light.png" which looks the same as the icon from the design guidelines:
Located in ...android-sdk\platforms\android-14\data\res\drawable-xhdpi
And the filename is a misnomer, the affordance is known as Up, and it is behaviorally different from the system BACK button.
@RomanNurik files like this often get internal names before formal names are introduced, probably what happened here. Though they should have known better from the start; there's already a Back button on every android phone of course.