I am attempting to use the volume buttons in a unity3d game on Android. Unfortunately I can\'t see anything pertaining to volume being mapped as a KeyCode, so it seems to me tha
I do not think you can map controls to the volume buttons in Unity (using keycodes). Those buttons are controlled by the system OS, it would be a bad idea to map anything to it anyways.
You can however map to the Android touch buttons. I beileve back is Keycode.Escape and menu is Keycode.Menu.