IconShock, the icon design company behind many popular icon sets, is now sharing a huge set for Android designers/developers.
Android Icons Set consists of 15,000 items styled with the Android’s design guidelines and probably the most complete set for the platform.
There are 600 completely unique items while the rest are the addons (like “add file, edit file, delete file”) which is great to have the necessary action icons when needed.
It is free to be used in personal projects (free version includes 3 sizes: 24*24px, 32*32px, 48*48px).
P.S. They also have a similar iPhone icons set.