I am new in Payment Gateway. Currently, I am working on a mobile app where I need to integrate PayU payment gateway in android app.
So far, I have created a code for TES
I was facing the same issue and am feed up with this integration's.
But after contacting with payumoney.com sport team, they told me that the integration kit showing in the downloading kit is not active, that is the key(JBZaLc) and salt(GQs7yium) its only a dummy data's. So we need to send your company details including the bank details, then they verify your company details, then they will provide us the new integration kit. With that kit we can do the testing.