Can i detect if activity was launched normally or after nfc tag with Android Application Record (AAR) was read
===

After a few tutorials, i am not sure if i should use Android Application Record (AAR) as my NDEF record (or just TNF_WELL_KNOWN with RTD_TEXT)
What action will launch my activity, 

    android.intent.action.MAIN

or

    android.nfc.action.NDEF_DISCOVERED ?

I need to do slighty different things in my activity whether activity is launched normally or after nfc tag reading.

Thank you