Getting information about user interaction from application running in backgorund.

I have been searching this since last two days and till now i have no luck. I am working on an android application which can be used to capture the sequence of user interaction on android device. Starting from when the device is powered ON. This is to be done by an application, based on the users event a script (Comma (,) delimited text format) will be generated which can be used further to played back the records of events.The application must have various button to start, pause, stop button for recording, script creation should also work according to button pressed.
It is possible to keep track of record of user interaction from background in android??
I didn't get anything about this. Any help or suggestion is well appreciate.

— modified on Apr 4, 2012, 3:43:08 PM