Payswiff SDK integradetion on Android

I want to integrate Payswiff SDK in my android project. The Payswiff is the payment gateway to integrate with the app to pay Online card payment via Bluetooth. So when users press the Pay button the payment page want to redirect. make demo project keep one Button name of Pay when the users press the Pay Button payment page wants to appear. I'll give the link of SDK Here is the link below [login to view URL]