Writing data into Nexus 4 in card emulation mode w

I am trying to send some data to the Nexus 4 through NFC (i.e. the card emulation mode). I tried a number of the command APDUs such as writing and updating APDUs, but I couldn't get them to work.

What I am trying to say is, I want to send some data (that is not the AID) to the phone after the select APDU command.

Thanks in advance,

Bader

The HCE emulated card will understand exactly those commands that your HCE app's APDU service processes. So, for instance, if your HCE service's processCommandApdu() callback method looks like this:

final static byte[] SW_NO_ERROR = new byte[]{ (byte)0x90, (byte)0x00 };
final static byte[] SW_INCORRECT_P1P2 = new byte[]{ (byte)0x6A, (byte)0x86 };
final static byte[] SW_INS_NOT_SUPPORTED = new byte[]{ (byte)0x6D, (byte)0x00 };
final static byte[] SW_ERR_UNKNOWN = new byte[]{ (byte)0x6F, (byte)0x00 };

@Override
public byte[] processCommandApdu(byte[] apdu, Bundle extras) {
    if (apdu.length >= 4) {
        if ((apdu[1] == (byte)0xA4) && (apdu[2] == (byte)0x04)) {
             // SELECT APPLICATION
             return SW_NO_ERROR;
        } else if ((apdu[1] == (byte)0xCA) && (apdu[2] == (byte)0x02)) {
             // GET DATA (SIMPLE TLV)
             switch (apdu[3] & 0x0FF) {
                 case 0x001:
                     return new byte[]{ apdu[3], (byte)0x02, (byte)0x01, (byte)0x00, (byte)0x90, (byte)0x00 };
                 case 0x002:
                     return new byte[]{ apdu[3], (byte)0x02, (byte)0x12, (byte)0x34, (byte)0x90, (byte)0x00 };
                 case 0x003:
                     return new byte[]{ apdu[3], (byte)0x06, (byte)0xAA, (byte)0xBB, (byte)0xCC, (byte)0xDD, (byte)0xEE, (byte)0xFF, (byte)0x90, (byte)0x00 };
                 default:
                     return SW_INCORRECT_P1P2;
             }
        } else {
            return SW_INS_NOT_SUPPORTED;
        }
    }

    return SW_ERR_UNKNOWN;
}

Your HCE app would understand the following command APDUs: