title: Reading from an EMV Card to perform transactions
body: <p>I have an mPos android app I'm working on which basically requires reading from the EMV chip card to perform transactions. 
  I understand the concept of sending application protocol data unit (APDU) commands to the chip and receiving APDU responses in return.
  However I am lost and confused as I don't know the exact APDU commands to send to the chip when I need to perform a financial transaction. 
  I have read some of the official EMV docs and also spent days googling but I couldn't find what I was looking for. 
  Any pointers and help would be greatly appreciated. </p>