Differentiating between an Activity launch from home screen or from another activity from App

Question

I need to know a generic way to distinguish between a call of activity from launcher and a call from another activity from inside my app, or a BACK on the activity stack

Answer 1

You can find it out from intent flag.

step 1:

  Intent intent = getIntent();
  int flag = intent.getFlag();

step 2:

if flag  =  Intent.FLAG_ACTIVITY_NEW_TASK 
  launch from other app or activities
else 
  launch from home page