(Android™) PC/SC Get Card UID

See more SCard Examples

Sends the APDU command to get a card's UID.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSCard scard = new CkSCard();

    // First establish a context to the PC/SC Resource Manager
    boolean success = scard.EstablishContext("user");
    if (success == false) {
        Log.i(TAG, scard.lastErrorText());
        return;
        }

    // Use your own smart card reader name here.
    success = scard.Connect("ACS ACR122 0","shared","no_preference");
    if (success == false) {
        Log.i(TAG, scard.lastErrorText());
        return;
        }

    Log.i(TAG, "Connected reader: " + scard.connectedReader());
    Log.i(TAG, "Active protocol: " + scard.activeProtocol());
    Log.i(TAG, "ATR: " + scard.cardAtr());
    Log.i(TAG, "Reader Status: " + scard.readerStatus());

    //  Send the APDU command 0xFF, 0xCA, 0x00, 0x00, 0x00
    CkBinData bdRecv = new CkBinData();
    success = scard.TransmitHex(scard.activeProtocol(),"FFCA000000",bdRecv,32);
    if (success == true) {

        Log.i(TAG, "Received: " + bdRecv.getEncoded("hex"));

        // The UID is the returned data without the final 2 bytes.
        int numBytes = bdRecv.get_NumBytes();
        if (numBytes > 2) {
            Log.i(TAG, "UID: " + bdRecv.getEncodedChunk(0,numBytes - 2,"hex"));
            }

        }
    else {
        Log.i(TAG, scard.lastErrorText());
        }

    // Disconnect from this reader.
    success = scard.Disconnect("leave");
    if (success == false) {
        Log.i(TAG, scard.lastErrorText());
        }

    // Applications should always release the context when finished.
    success = scard.ReleaseContext();
    if (success == false) {
        Log.i(TAG, scard.lastErrorText());
        }


  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}