title: Android off-game click tracking
body: <p>I would like to know if it is possible to have a process that would constantly run on the phone and would track the number of times a user taps on the screen. 
  For example, the user downloads a game, plays and then quits the app and although he quit the app, this process that got installed together with the app will still run and all that it would do, is that it will increment a value every time the user taps on the screen and then remember the said value, in order to be used the next time the user starts the app.
  I don't know if this is a simple question or not but please keep in mind that I am new to Android development and I did not find any related topics on this.</p>
  
  <p>Thank you in advance.</p>