How to Customize the POS Graphical User Interface for PINPAD Input

API

setupCallbackHandler

boolean setupCallbackHandler(PinPadCallbackHandler handler)

Set a callback handler. When an input occurs to PINPAD, the callback handler is called.

Parameters
handler	PinPadCallbackHandler : Not null.

Returns
boolean	true: success.

processCallback of PinPadCallbackHandler

void processCallback(byte[] data);

The callback method.

Parameters
data	byte[] : date[0] is the count of input pin.

Usage

The setupcallbackhandler method will set a callback handler. Before calling this method, you should call the open method. After setting the callback handler, the default PINPAD UI will not pop up, the driver will send the inputing PIN count to the callback handler, then the third-app can process the inputing PIN count.

Snippet code:

    PINPadDevice device = (PINPadDevice) POSTerminal.getInstance(mContext)
                    .getDevice("cloudpos.device.pinpad");

    device.open();

    device.setupCallbackHandler(new PinPadCallbackHandler() {
           @Override
           public void processCallback(byte[] data) {
               Log.e(TAG, "processCallback   ");

               mHandler.obtainMessage(PIN_KEY_CALLBACK, data[0]).sendToTarget();
          }
     });

     KeyInfo keyInfo = new KeyInfo(PINPadDevice.KEY_TYPE_MK_SK, 0, 0, 4);
     String pan = "0123456789012345678";
     OperationResult operationResult = device.waitForPinBlock(keyInfo, pan, false,
                    TimeConstants.FOREVER);
     if (operationResult.getResultCode() == OperationResult.SUCCESS) {
        byte[] pinBlock = ((PINPadOperationResult) operationResult).getEncryptedPINBlock();
        sendSuccessLog2("PINBlock = " + StringUtility.byteArray2String(pinBlock));
     } else {
        sendFailedLog2(mContext.getString(R.string.operation_failed));
     }


    device.close();