/**
* Callback when a new tag is discovered by the system.
*
* <p>Communication with the card should take place here.
*
* @param tag Discovered tag
*/
public void OnTagDiscovered(Android.Nfc.Tag tag)
{
Console.WriteLine("New tag discovered");
IsoDep isoDep = IsoDep.Get(tag);
if (isoDep != null)
{
try
{
// Connect to the remote NFC device
isoDep.Connect();
byte[] command = new byte[] {
(byte)0x00, /* CLA = 00 (first interindustry command set) */
(byte)0xA4, /* INS = A4 (SELECT) */
(byte)0x04, /* P1 = 04 (select file by DF name) */
(byte)0x0C, /* P2 = 0C (first or only file; no FCI) */
(byte)0x07, /* Lc = 7 (data/AID has 7 bytes) */
/* AID = D6 16 00 00 30 01 01: */
(byte)0xD6, (byte)0x16, (byte)0x00, (byte)0x00,
(byte)0x30, (byte)0x01, (byte)0x01,
(byte)0x00
};
byte[] result = isoDep.Transceive(command);
// If AID is successfully selected, 0x9000 is returned as the status word (last 2
// bytes of the result) by convention. Everything before the status word is
// optional payload, which is used here to hold the account number.
int resultLength = result.Length;
byte[] statusWord = { result[resultLength - 2], result[resultLength - 1] };
byte[] payload = new byte[resultLength - 2];
Array.Copy(result, payload, resultLength - 2);
bool arrayEquals = SELECT_OK_SW.Length == statusWord.Length;
for (int i = 0; i < SELECT_OK_SW.Length && i < statusWord.Length && arrayEquals; i++)
{
arrayEquals = (SELECT_OK_SW[i] == statusWord[i]);
if (!arrayEquals)
{
break;
}
}
if (arrayEquals)
{
// The remote NFC device will immediately respond with its stored account number
string info = System.Text.Encoding.UTF8.GetString(result);
Console.WriteLine("Received: " + info);
// Inform CardReaderFragment of received account number
InfoCallback ourCallback;
if (callback.TryGetTarget(out ourCallback))
{
ourCallback.InfoRecieved(info);
}
}
}
catch (Exception e)
{
Console.WriteLine("Error communicating with card: " + e.Message);
}
}
}
private Ndef GetNdef(Tag tag)
{
Ndef ndef = Ndef.Get(tag);
if (ndef == null)
return null;
else
return ndef;
}
/**
* Callback when a new tag is discovered by the system.
*
* <p>Communication with the card should take place here.
*
* @param tag Discovered tag
*/
public void OnTagDiscovered(Android.Nfc.Tag tag)
{
Log.Info(TAG, "New tag discovered");
IsoDep isoDep = IsoDep.Get(tag);
if (isoDep != null)
{
try{
// Connect to the remote NFC device
isoDep.Connect();
// Build SELECT AID command for our loyalty card service.
// This command tells the remote device which service we wish to communicate with.
Log.Info(TAG, "Requesting remote AID: " + SAMPLE_LOYALTY_CARD_AID);
byte[] command = BuildSelectApdu(SAMPLE_LOYALTY_CARD_AID);
// Send command to remote device
Log.Info(TAG, "Sending: " + ByteArrayToHexString(command));
byte[] result = isoDep.Transceive(command);
// If AID is successfully selected, 0x9000 is returned as the status word (last 2
// bytes of the result) by convention. Everything before the status word is
// optional payload, which is used here to hold the account number.
int resultLength = result.Length;
byte[] statusWord = { result[resultLength - 2], result[resultLength - 1] };
byte[] payload = new byte[resultLength - 2];
Array.Copy(result, payload, resultLength - 2);
bool arrayEquals = SELECT_OK_SW.Length == statusWord.Length;
for (int i = 0; i < SELECT_OK_SW.Length && i < statusWord.Length && arrayEquals; i++)
{
arrayEquals = (SELECT_OK_SW[i] == statusWord[i]);
if (!arrayEquals)
{
break;
}
}
if (arrayEquals)
{
// The remote NFC device will immediately respond with its stored account number
string accountNumber = System.Text.Encoding.UTF8.GetString(payload);
Log.Info(TAG, "Received: " + accountNumber);
// Inform CardReaderFragment of received account number
AccountCallback accountCallback;
if (mAccountCallback.TryGetTarget(out accountCallback))
{
accountCallback.OnAccountRecieved(accountNumber);
}
}
} catch (Exception e) {
Log.Error(TAG, "Error communicating with card: " + e.Message);
}
}
}
private bool TryAndFormatTagWithMessage(Tag tag, NdefMessage ndefMessage)
{
var format = NdefFormatable.Get(tag);
if (format == null)
{
_alertMessage.Text = "Tag does not appear to support NDEF format.";
}
else
{
try
{
format.Connect();
format.Format(ndefMessage);
_alertMessage.Text = "Tag successfully written.";
return true;
}
catch (IOException ioex)
{
_alertMessage.Text = "There was an error trying to format the tag: "+ioex.Message;
}
}
return false;
}
public void OnNewIntent (object sender, Intent e)
{
droidTag = e.GetParcelableExtra(NfcAdapter.ExtraTag) as Tag;
nfcTag.TechList = new List<string>(droidTag.GetTechList());
nfcTag.Id = droidTag.GetId();
if (GetNdef (droidTag) == null)
{
nfcTag.IsNdefSupported = false;
}
else
{
nfcTag.IsNdefSupported = true;
Ndef ndef = GetNdef (droidTag);
nfcTag.NdefMessage = ReadNdef (ndef);
nfcTag.IsWriteable = ndef.IsWritable;
nfcTag.MaxSize = ndef.MaxSize;
}
RaiseNewTag(nfcTag);
}
private bool TryAndWriteToTag(Tag tag, NdefMessage ndefMessage)
{
// This object is used to get information about the NFC tag as
// well as perform operations on it.
var ndef = Ndef.Get(tag);
if (ndef != null)
{
ndef.Connect();
// Once written to, a tag can be marked as read-only - check for this.
if (!ndef.IsWritable)
{
_alertMessage.Text = "Tag is read-only.";
}
// NFC tags can only store a small amount of data, this depends on the type of tag its.
var size = ndefMessage.ToByteArray().Length;
if (ndef.MaxSize < size)
{
_alertMessage.Text = "Tag doesn't have enough space.";
}
ndef.WriteNdefMessage(ndefMessage);
_alertMessage.Text = "Succesfully wrote tag.";
return true;
}
return false;
}
/// <summary>
///
/// </summary>
/// <param name="tag"></param>
/// <param name="ndefMessage"></param>
/// <returns></returns>
private bool TryAndFormatTagWithMessage(Tag tag, NdefMessage ndefMessage)
{
var format = NdefFormatable.Get(tag);
if (format == null)
{
DisplayMessage("Tag does not appear to support NDEF format.");
}
else
{
try
{
format.Connect();
format.Format(ndefMessage);
DisplayMessage("Tag successfully written.");
return true;
}
catch (IOException ioex)
{
var msg = "There was an error trying to format the tag.";
DisplayMessage(msg);
Log.Error(Tag, ioex, msg);
}
}
return false;
}
// public LoyaltyCardReader (WeakReference<AccountCallback> accountCallback)
// {
// mAccountCallback = accountCallback;
// }
/**
* Callback when a new tag is discovered by the system.
*
* <p>Communication with the card should take place here.
*
* @param tag Discovered tag
*/
public void OnTagDiscovered(Android.Nfc.Tag tag)
{
isoDep = IsoDep.Get(tag);
if (isoDep != null)
{
try{
// Connect to the remote NFC device
isoDep.Connect();
Log.Info(TAG, "Tag connected");
// Build SELECT AID command for our loyalty card service.
// This command tells the remote device which service we wish to communicate with.
//byte[] command = BuildSelectApdu(SAMPLE_LOYALTY_CARD_AID);
// Send command to remote device
//byte[] result = isoDep.Transceive(command);
// If AID is successfully selected, 0x9000 is returned as the status word (last 2
// bytes of the result) by convention. Everything before the status word is
// optional payload, which is used here to hold the account number.
// int resultLength = result.Length;
// byte[] statusWord = {result[resultLength-2], result[resultLength-1]};
// byte[] payload = new byte[resultLength-2];
// Array.Copy(result, payload, resultLength-2);
// bool arrayEquals = SELECT_OK_SW.Length == statusWord.Length;
//
// for (int i = 0; i < SELECT_OK_SW.Length && i < statusWord.Length && arrayEquals; i++)
// {
// arrayEquals = (SELECT_OK_SW[i] == statusWord[i]);
// if (!arrayEquals)
// break;
// }
// if (arrayEquals) {
// //Console.WriteLine ("aaa");
// // The remote NFC device will immediately respond with its stored account number
// string accountNumber = System.Text.Encoding.UTF8.GetString (payload);
// MainActivity.chatService.Write (payload);
// //bluetoothChat.conversationArrayAdapter.Add ("Account: " + accountNumber);
// // Inform CardReaderFragment of received account number
// AccountCallback accountCallback;
// if(mAccountCallback.TryGetTarget(out accountCallback))
// {
// accountCallback.OnAccountRecieved(accountNumber);
// }
// }
// else {
//command = HexStringToByteArray("00A40000023F00");
// Send command to remote device
/*Console.WriteLine("Sending PBOC: " + ByteArrayToHexString(command));
* result = isoDep.Transceive(command);
* Console.WriteLine("PBOC returns: " + ByteArrayToHexString(result));
*
*
* string strCommand = StringToHexString(PPSE_CARD_AID);
* command = BuildSelectApdu(strCommand);
* // Send command to remote device
* Console.WriteLine("Sending PBOC: " + ByteArrayToHexString(command));
* result = isoDep.Transceive(command);
* Console.WriteLine("PBOC returns: " + ByteArrayToHexString(result));
*
* command = HexStringToByteArray("00B2010C00");
* // Send command to remote device
* Console.WriteLine("Sending PBOC: " + ByteArrayToHexString(command));
* result = isoDep.Transceive(command);
* Console.WriteLine("PBOC returns: " + ByteArrayToHexString(result));
* //}*/
// command = BuildSelectApdu(UPAY2_CARD_AID);
// // Send command to remote device
// Console.WriteLine("Sending PBOC: " + ByteArrayToHexString(command));
// result = isoDep.Transceive(command);
// Console.WriteLine("PBOC returns: " + ByteArrayToHexString(result));
//MainActivity.conversationArrayAdapter.Add ("command: " + command.ToString());
/*command = HexStringToByteArray("00B2011400");
* // Send command to remote device
* Console.WriteLine("Sending PBOC: " + ByteArrayToHexString(command));
* result = isoDep.Transceive(command);
* Console.WriteLine("PBOC returns: " + ByteArrayToHexString(result));
*
* command = BuildSelectApdu(UPAY1_CARD_AID);
* Console.WriteLine("Sending PBOC: " + ByteArrayToHexString(command));
* result = isoDep.Transceive(command);
* Console.WriteLine("PBOC returns: " + ByteArrayToHexString(result));
*
* command = BuildSelectApdu(SPTC_CARD_AID);
* Console.WriteLine("Sending PBOC: " + ByteArrayToHexString(command));
* result = isoDep.Transceive(command);
* Console.WriteLine("PBOC returns: " + ByteArrayToHexString(result));
*
* command = HexStringToByteArray("00B2011400");
* Console.WriteLine("Sending PBOC: " + ByteArrayToHexString(command));
* result = isoDep.Transceive(command);
* Console.WriteLine("PBOC returns: " + ByteArrayToHexString(result));*/
/*command = BuildSelectApdu("A000000333010106");
* Console.WriteLine("Sending PBOC: " + ByteArrayToHexString(command));
* result = isoDep.Transceive(command);
* Console.WriteLine("PBOC returns: " + ByteArrayToHexString(result));*/
//MainActivity.chatService.Write (Encoding.UTF8.GetBytes(ByteArrayToHexString(result)));
/*string accountNumber = System.Text.Encoding.UTF8.GetString (result);
* AccountCallback accountCallback;
* if(mAccountCallback.TryGetTarget(out accountCallback))
* {
* accountCallback.OnAccountRecieved(accountNumber);
* }*/
// }
} catch (Exception e) {
}
}
}
