CODEWITHSUNDEEP
androidnfc
Sean
Sean

Reputation: 47

Host-Card Emulation Reader Model

From reading the HCE developers guide here HCE Developer's Guide seems it is possible to use an android phone as a reader. I put card information on an NFC tag, and then read it with my phone. I want to have the phone act as the reader. Do you know if this is possible? I have created a sample project with the following lines of code in it:

import android.nfc.cardemulation.HostApduService;
import android.os.Bundle;


public class MyHostAPDUService extends HostApduService{
@Override
public byte[] processCommandApdu(byte[] apdu, Bundle extras) {
   ...
}
@Override
public void onDeactivated(int reason) {
   ...
}
}

I don't know where to go next.

Upvotes: 0

Views: 594

Answers (1)

ShortMan
ShortMan

Reputation: 101

I have achieved using the phone as a reader but through a slightly different approach:

Using an activity as the base I created a simple reader application where I sent a select and then some following APDUs to a card

private NfcAdapter mAdapter;
private PendingIntent mPendingIntent;
private String[][] mTechLists;
private IsoDep card;

onCreate(){

...

mAdapter = NfcAdapter.getDefaultAdapter(this);

mPendingIntent = pendingIntent.getActivity(this, 0, new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP),0);

mTechLists = new String[][]{new String[]{IsoDep.class.getName()},new String[]{IsoDep.class.getName()}};


...
}

onPause(){
mAdapter.disableForegroundDispatch(this);
}

onResume(){
mAdapter.enableForegroundDispatch(this,mPendingIntent,null,mTechLists);
}

onNewIntent(Intent intent){

Tag theTag = (Tag)intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);

card = IsoDep.get(theTag);

...

card.connect();
...
byte[] response = card.transceive(apduBytes);
}

I haven't done much more work on this as it was just a proof of concept but I hope it's helpful.

Upvotes: -1

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