Java Development

[arun_s]

Hello All,

I am trying to write an application that reads a (NFC enabled) credit card and related data using the NFC APIs available for BB OS7. My application implements the NDEFMessageListener and DetectionListener interface, but there's no activity when I bring a card close to the NFC antenna. Is there something I am overlooking?

Do I also need to implement the TransactionListener interface and use the SecureElementManager and related classes? I could not come across a whole lot of information to guide me through this, unfortunately.

[mwoolley]

There could be a number of explanations for the lack of apparent NFC activity.

- Is NFC switched on in the "Manage Connections" screen on your device (forgive the obvious question)

- have you witnessed *any* NFC activity with other targets such as for example a basic smart poster with this device? Worth checking this in case your device is actually faulty. Please tell me the PCB number on the reverse side of the battery door of your device. Also, please  look for a 5 digit CPR number within the battery compartment. Send these to me as a private message so I can investigate your device.

I doubt NDEFMessageListener is appropriate for a credit card. I would expect DetectionListener to register the presence of the card however.

[mwoolley]

From the device details provided, I believe your hardware is fine.

So that leaves my other comments and questions. What do you think?

[arun_s]

Hello,

I just got my hands on a BlackBerry 9360 (Curve) and I'm trying to  work on the same application- to get a NFC enabled card to be read by an application I am developing.

I did manage to get going this time, with my card being successfully detected. However, I get an IOException each time I call the connection.transceive() method, the message being "Error exchanging ISO14443-4 data : Invalid handle".

The Target object does seem to have a valid URI associated with it, if that helps.

[mwoolley]

Do you know for sure the card supports layer 4? Some NFC cards/tags only support up to layer 3.

What is the purpose of you wanting to read a credit card by the way?

[arun_s]

Thanks for the reply. I do make a check if the Target type is ISO14443-4 and it does return true.

My intention of reading a credt card is to obtain information like card numer, name, etc. for my application.

[mwoolley]

I don't know enough about credit cards but suspect that you will not be able to read them direct like this. Have you looked at the EMV specifications?

[arun_s]

The command I'm sending seems to be fine, the problem is the invalid connection handle.

I also have a J2ME version of the app and an Android version, the same command seems to work just fine.

[mwoolley]

Could you send me the following as a private message with attachment please?

Precise OS version you are running on as shown in Options-About

Your source code.

I'll take a look and see if I can advise.

Thanks