Screaming Penguin - Source Does Matter

I use the provided Android "drawables" with my Android apps fairly often. (You can use the built in resources in addition to your own.) I find the "ic_menu" items the most useful. I reuse the same icons the built in apps use for common functions like "save", "edit", "delete", "dial", "browse", and so on. Also, from time to time, some other image the platform provides fits. I found myself guessing at particular images from names, and then jotting down notes - and then finally said to myself "man, I gotta write a script to just spit these out in a table for reference."

Hence, here is the full reference to the included drawables for the 1.0 SDK.

Yes, you can also just include your own drawables with your app, but the thing with the built ins is that they are always there with every app, provided by the platform, and they already cover many common icons you may need (they are in the "android" package, and included in the android.jar file).