How do I verify PayPal mobile payments?

[AC Question]

How to verify PayPal mobile payments

Hi? i integrated PayPal in my android app, am able to make a payment and the transaction is well done on both side (seller account and client side). I have followed the steps found on paypal but i can't figure out how to integrate it in android. Can anyone help me of how i can verify payment and get the response from PayPal. Thanks, Alain