Select the default key handling for this activity. This controls what will happen to key events that are not otherwise handled. The default mode (Activity.DEFAULT_KEYS_DISABLE) will simply drop them on the floor. Other modes allow you to launch the dialer (Activity.DEFAULT_KEYS_DIALER), execute a shortcut in your options menu without requiring the menu key be held down (Activity.DEFAULT_KEYS_SHORTCUT), or launch a search (Activity.DEFAULT_KEYS_SEARCH_LOCAL and Activity.DEFAULT_KEYS_SEARCH_GLOBAL).

Note that the mode selected here does not impact the default handling of system keys, such as the "back" and "menu" keys, and your activity and its views always get a first chance to receive and handle all application keys.

[Android Documentation]