Sms ContentObserver onChange() fires multiple times

Question

I know this question has been asked multiple times, but nobody has been able to come up with a working answer from what I have seen.

Im working on an app to intercep

Answer 1

If the two are identical:
store each message recv'd
compare it to previous messages recv'd
if not found, process
if found, discard the message

The life of the messages stored should be infinitesimal, a little circular buffer of 5 messages should be fine.