Android user presses a key

Is there a way to register a receiver for a app running in the background for when a user presses a key. Kind of like "ACTION_USER_PRESENT" but if any keys were pressed on the screen.

MORE DETAIL: My app is running as a service in the background. User ope开发者_JAVA技巧ns the phone and presses keys, like they searching for something online on their driod. Can I capture those key presses in the background?

To detect whether a user is using the device you could also use the information whether the screen is on or off as an approximation (making the assumption that the screen timeout is set). This blog entry shows how to capture the screen on and off events (I haven't done it myself though).

In the Android HCI Extractor ( http://code.google.com/p/android-hci-extractor/ ) we traverse the GUI and install some event filters (by using listeners) in the app top view.

Maybe if you can reach a top level view from which listen the events you could listen to all the events for this view. Let's try ;-)

This tool is an open-source prototype you can find here: http://code.google.com/p/android-hci-extractor/

It is very easy to integrate and use. In the tutorials you can see that only a few lines of code are needed: http://www.catedrasaes.org/trac/wiki/MIM

I hope it helps you!!