title: Android: Firing an activity on a call only for international phone numbers
body: <p>I want to launch an activity only when a user calls specific number (e.g.  phone number of a specific country)</p>
  
  <p>From what i read, i understand i can create an intent-filter for android.intent.action.CALL,
  but i wonder if i can invoke the application just for certain numbers (just for numbers that belongs to that country, for example). Ideally i will like the user to be able to define this filter himself. so it will not be hard coded in the manifest file.</p>
  
  <p>Is this possible?</p>