Re:Android phones are sending significant amount of user dat...
by dr_kiszonka on Tuesday October 12, 2021 @11:23AM
(#28840846)
Exactly right. And you don't have to be a system app to access this information. Any app with sufficient permissions granted explicitly by a user can access these data (no root needed), and it may have legitimate reasons for doing it.
Android apps have zero or more activities, each of which may be thought of as a single screen and a single Intent, which is a bit like a URL (and sometimes very much like a URL). A messenger or email app will typically have a main activity, an activity to view a single message, an activity to view a conversation with someone, perhaps an activity to view a single attached image, probably an activity to view and edit the application's settings, and so on.
What is sent is perhaps the app's name and a class name within the app for each activity that's started.