Process method does not receive full APDU command from host?

Question

The host sends the following command to applet to select EF file

00 A4 02 00 02 40 01

The purpose is to select EF file with ID 40 01<

Answer 1

To get data in APDU buffer you need to call apdu.setIncomingAndReceive() and as in EMV specification AID for an applet is 5-16 bytes can't use less than 5 bytes.