Can't understand isFinishing

Question

I've been studying Google IO 2012 code
In one of the activities (HomeActivity.java) they're doing as follows:

void onCreate(Bundle savedInstance)
{
   if(someCondition) {
      // start some other activity here
      finish(); // finish this activity
   }

   if(isFinishing()) return;

   // More code here
}

I wonder why they do not put return right after finish() but instead checking isFinishing() ?

Answer 1

An Activity can be finished in a number of ways.

finishActivity from an activity that has called startActivityForResult

finishAffinity and finishFromChild

So isfinishing is used to account for such cases.