Can anyone explain me the difference between finish() and finishActivity(int requestCode). And the situation of where to use them aptly.
Th
Read Following:
public void finish ()
Call this when your activity is done and should be closed. The ActivityResult is propagated back to whoever launched you via onActivityResult().
public void finishActivity (int requestCode)
Force finish another activity that you had previously started with startActivityForResult(Intent, int).
For further reading have a look at the documentation.