To support usability studies on what applications are used, i want to
write a service that logs when an activity is started and also when it
has finished.  This is to understand how the users are using the
device:

One straightforward option is to have the applications modify, to
write this out.  But this is tedious having to modify all applications
and will not work esp with third party or built in applications.

Is there any alternatives that makes this simpler and easier?

BTW: Looking at the android framework source ActivityManagerNative
seems to be invoking a Binder interface when an Activity is started
and finished.  Any information on what this service is?   Is this
something i can tap into?

Apologizes if i am looking at the wrong code, my first foray in to the
framework code.

Any information or thoughts is greatly appreciated.

Thx!
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