I am trying to integrate paytm\'s payment gateway to my Android App. I can\'t seem to find any proper documentations or procedures on their website. I\'ve checked every lead on
Try this answer :
Go and open this link.
1) Download Android+SDK
2) After downloading it , you will get pgsdk.jar in it and also put in your project folder.
3) Now put their code.
4) In their code, they ask for ChecksumGenerator and ValidateChksum URL which are for testing purpose. You can get it by contacting to paytm development support team and they will give you checksum generation and checksum validation code including merchant id and all necessary things that you need to deploy in your server.
And after successfully integration might be your problem get solved.
See Below link for Knowing some facts regarding PayTm.
https://www.quora.com/How-do-I-integrate-Paytm-wallet-in-an-Android-application-as-a-payment-option-just-like-in-the-Uber-app