How to Understand Java API Usage for Contactless CPU Cards

• Get RFCardReaderDevice

  device = (RFCardReaderDevice) POSTerminal.getInstance(mContext).getDevice(POSTerminal.DEVICE_NAME_RF_CARD_READER);

• Open device

  device.open();

• Search Card

  OperationListener listener = new OperationListener() {
    @Override
    public void handleResult(OperationResult arg0) {
      if (arg0.getResultCode() == OperationResult.SUCCESS) {
        sendSuccessLog2(mContext.getString(R.string.find_card_succeed));
        rfCard = ((RFCardReaderOperationResult) arg0).getCard();
      } else {
        sendFailedLog2(mContext.getString(R.string.find_card_failed));
      }
    }
  };
  device.listenForCardPresent(listener, TimeConstants.FOREVER); The result will be returned in the callback listener.

• Communicate with Card

  CPUCard cpucard = ((CPUCard) rfCard);
  if (rfCard instanceof CPUCard) {
    ATR atr = cpucard .connect();
    result = cpucard .transmit(arryAPDU, 0);
    cpucard .disconnect();
  }

• Close device

  device.close();