/// <inheritdoc/>
public bool Write(params NfcDefRecord[] records)
{
var message = new NdefMessage(records.Select(x =>
new NdefRecord(AndroidNfc.GetTypeNameFormat(x.TypeNameFormat), null, null, x.Payload)).ToArray());
if (_ndef != null)
{
if (!Writable)
{
return(false);
}
_ndef.Connect();
// NFC tags can only store a small amount of data, this depends on the type of tag its.
var size = message.ToByteArray().Length;
if (_ndef.MaxSize < size)
{
throw new InvalidOperationException("Not enough space on NFC tag");
}
_ndef.WriteNdefMessage(message);
return(true);
}
var format = NdefFormatable.Get(_base);
format.Connect();
format.Format(message);
return(true);
}
private bool TryAndFormatTagWithMessage(Tag tag, NdefMessage ndefMessage)
{
var format = NdefFormatable.Get(tag);
if (format == null)
{
Toast.MakeText(this, "Tag does not appear to support NDEF format.", ToastLength.Short).Show();
}
else
{
try
{
format.Connect();
format.Format(ndefMessage);
Toast.MakeText(this, "Tag successfully written.", ToastLength.Short).Show();
return(true);
}
catch (Exception ioex)
{
var msg = "There was an error trying to format the tag: ";
Toast.MakeText(this, msg + ioex, ToastLength.Short).Show();
}
}
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);
}
/*
* Method Name: FormatCard
* Purpose: To format the card to be able to be written to
*/
private async Task FormatCard(Tag cardTag, NdefMessage cardContent)
{
try
{
var formatter = NdefFormatable.Get(cardTag);
if (formatter == null)
{
AlertBoxComponent cardFullAlertBox = new AlertBoxComponent(_context);
cardFullAlertBox.Setup("Incorrect Card Type", "This card does not support Ndef format. Please use a different card.");
cardFullAlertBox.Show();
}
await formatter.ConnectAsync();
await formatter.FormatAsync(cardContent);
formatter.Close();
AlertBoxComponent writeSuccessfulAlertBox = new AlertBoxComponent(_context);
writeSuccessfulAlertBox.MenuOptionSetup("Card Write Was Successful", "The card was successfully written to. You will now be taken back to the main menu.", _context, _activity);
writeSuccessfulAlertBox.Show();
}
catch (Exception e)
{
AlertBoxComponent cardFullAlertBox = new AlertBoxComponent(_context);
string alertMessage = "An error has occured. Please try again.Error: " + e;
cardFullAlertBox.Setup("Error Writing To Card", alertMessage);
cardFullAlertBox.Show();
}
}
private Boolean FormatNFC(Ndef ndef)
{
bool retorno = false;
NdefFormatable ndefFormatable = NdefFormatable.Get(ndef.Tag);
Java.Lang.String msg = new Java.Lang.String(MENSAGEM_PADRAO);
try
{
if (ndefFormatable == null)
{
return(retorno);
}
if (!ndefFormatable.IsConnected)
{
ndefFormatable.Connect();
}
ndefFormatable.Format(new NdefMessage(NdefRecord.CreateMime
("UTF-8", msg.GetBytes(Charset.ForName("UTF-8")))));
ndefFormatable.Close();
retorno = true;
}
catch (Exception e)
{
Console.WriteLine(e.Message);
throw new System.Exception("Não foi possível ler o cartão.");
}
return(retorno);
}
/// <summary>
/// Attempts to format a new tag with the message.
/// </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)
{
if (tag.GetTechList().Any((s) => s.ToLower().Contains("ndef")))
{
DisplayMessage("Tag supports NDEF but is not formattable - not all of them are.\nYou might also retry the write.");
}
else
{
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(Res.AtroposMimeType, ioex, msg);
}
}
return(false);
}
private bool?FormatNdef(Tag tag, NdefMessage ndefMsg)
{
NdefFormatable ndef = NdefFormatable.Get(tag);
if (ndef == null)
{
ShowToast("Tag is not NDEF formatable.");
return(false);
}
try
{
ndef.Connect();
ndef.Format(ndefMsg);
}
catch (Exception e)
{
ShowToast("Failed formating tag: " + e.Message);
return(null);
}
finally
{
try
{
ndef.Close();
}
catch (Exception)
{
ShowToast("Tag connection failed to close.");
}
}
return(true);
}
/// <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 (Java.IO.IOException ioex)
{
var msg = "There was an error trying to format the tag.";
DisplayMessage(msg);
Log.Error(this.Application.PackageName, ioex.Message, msg);
}
}
// clear the input text
_writeTextView.Text = String.Empty;
return(false);
}
private void OnWriteTag(Intent intent, string content)
{
if (null != content)
{
var tag = intent.GetParcelableExtra(NfcAdapter.ExtraTag) as Tag;
if (tag != null)
{
Ndef ndef = Ndef.Get(tag);
if (ndef != null && ndef.IsWritable)
{
var payload = Encoding.ASCII.GetBytes(content);
var mimeBytes = Encoding.ASCII.GetBytes("text/plain");
var record = new NdefRecord(NdefRecord.TnfWellKnown, mimeBytes, new byte[0], payload);
var ndefMessage = new NdefMessage(new[] { record });
ndef.Connect();
ndef.WriteNdefMessage(ndefMessage);
ndef.Close();
}
else
{
NdefFormatable ndefFormatable = NdefFormatable.Get(tag);
if (ndefFormatable != null)
{
try
{
var payload = Encoding.ASCII.GetBytes(content);
var mimeBytes = Encoding.ASCII.GetBytes("text/plain");
var record = new NdefRecord(NdefRecord.TnfWellKnown, mimeBytes, new byte[0], payload);
var ndefMessage = new NdefMessage(new[] { record });
ndefFormatable.Connect();
ndefFormatable.Format(ndefMessage);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
finally
{
try
{
ndefFormatable.Close();
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
}
}
}
}
public WriteResponse WriteTag(NdefMessage message, Tag tag)
{
int size = message.ToByteArray().Length;
string mess = "";
try {
Ndef ndef = Ndef.Get(tag);
if (ndef != null)
{
ndef.Connect();
if (!ndef.IsWritable)
{
return(new WriteResponse(0, "Tag is read-only"));
}
if (ndef.MaxSize < size)
{
mess = "Tag capacity is " + ndef.MaxSize + " bytes, message is " + size
+ " bytes.";
return(new WriteResponse(0, mess));
}
ndef.WriteNdefMessage(message);
if (writeProtect)
{
ndef.MakeReadOnly();
}
mess = "Wrote message to pre-formatted tag.";
return(new WriteResponse(1, mess));
}
else
{
NdefFormatable format = NdefFormatable.Get(tag);
if (format != null)
{
try {
format.Connect();
format.Format(message);
mess = "Formatted tag and wrote message";
return(new WriteResponse(1, mess));
} catch (IOException) {
mess = "Failed to format tag.";
return(new WriteResponse(0, mess));
}
}
else
{
mess = "Tag doesn't support NDEF.";
return(new WriteResponse(0, mess));
}
}
} catch (Exception) {
mess = "Failed to write tag";
return(new WriteResponse(0, mess));
}
}
public override WriteResult WriteTag(NdefMessage message, Tag tag)
{
if (tag == null)
{
return(WriteResult.NULL);
}
try
{
var ndefTag = Ndef.Get(tag);
if (ndefTag == null)
{
NdefFormatable nForm = NdefFormatable.Get(tag);
if (nForm != null)
{
try
{
nForm.Connect();
nForm.Format(message);
nForm.Close();
return(WriteResult.OK);
} catch { return(WriteResult.FORMATFAILED); }
}
return(WriteResult.NOTSUPPORTED);
}
else
{
ndefTag.Connect();
if (ndefTag.MaxSize < message.ToByteArray().Length)
{
return(WriteResult.TOOLARGE);
}
if (ndefTag.IsWritable)
{
ndefTag.WriteNdefMessage(message);
ndefTag.Close();
return(WriteResult.OK);
}
return(WriteResult.READONLY);
}
}
catch { return(WriteResult.FAILED); }
}
public NFCMessage NdefFormatable_FormatTag(Tag tag)
{
if (!tag.GetTechList().Contains(Tech_NdefFormatable))
{
return(NFCMessage.NFC_UN_FORMATABLE_TAG);
}
NdefFormatable ndefFormatable = NdefFormatable.Get(tag);
if (ndefFormatable == null)
{
return(NFCMessage.NFC_CANT_FORMAT);
}
ndefFormatable.Connect();
NdefRecord record = NdefRecord.CreateMime("text/plain", Encoding.ASCII.GetBytes("New"));
NdefMessage message = new NdefMessage(new NdefRecord[] { record });
ndefFormatable.Format(message);
ndefFormatable.Close();
OnFormatting_NdefTag?.Invoke();
return(NFCMessage.NFC_TAG_FORMATED);
}
/**
*
* Método faz a formatação do cartão.
*
* A formatação do cartão só é necessario na sua primeira gravação.
*
* Após já existir algum valor gravado no cartão, não será possível formata-lo
* novamente.
*
* @param ndef = Contém as informações do cartão que esta sendo lido.
*
* @throws IOException
* @throws FormatException
*
* @return boolean => True = Cartão Formatado / False = Cartão não formatado
*
* */
public bool FormataCartao(Ndef ndef)
{
bool retorno = false;
NdefFormatable ndefFormatable = NdefFormatable.Get(ndef.Tag);
Java.Lang.String msg = new Java.Lang.String(MENSAGEM_PADRAO);
try
{
if (ndefFormatable == null)
{
return(retorno);
}
if (!ndefFormatable.IsConnected)
{
ndefFormatable.Connect();
}
ndefFormatable.Format(new NdefMessage(NdefRecord.CreateMime
("UTF-8", msg.GetBytes(Charset.ForName("UTF-8")))));
ndefFormatable.Close();
retorno = true;
}
catch (IOException e)
{
throw new IOException(e.Message);
}
catch (System.FormatException e)
{
throw new System.FormatException(e.Message);
}
finally
{
this.GravaTempoFinal();
}
return(retorno);
}
public (TagInfo?, NFCMessage) ReadInfo(Tag tag)
{
if (tag == null)
{
return(null, NFCMessage.NFC_NULL_TAG);
}
return(new TagInfo
{
Uid = tag.GetId(),
Tag = tag,
IsoDep = IsoDep.Get(tag),
MifareClassic = MifareClassic.Get(tag),
MifareUltralight = MifareUltralight.Get(tag),
NfcV = NfcV.Get(tag),
Ndef = Ndef.Get(tag),
NdefFormatable = NdefFormatable.Get(tag),
NfcA = NfcA.Get(tag),
NfcB = NfcB.Get(tag),
NfcF = NfcF.Get(tag),
NfcBarcode = NfcBarcode.Get(tag),
TechList = tag.GetTechList()
}, NFCMessage.NFC_NO_ERROR);
}
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);
}
protected override void OnNewIntent(Intent intent)
{
base.OnNewIntent(intent);
Toast.MakeText(this, "Leyendo NFC", ToastLength.Short).Show();
var tag = intent.GetParcelableExtra(NfcAdapter.ExtraTag) as Tag;
/*if (_inWriteMode)
* {
* _inWriteMode = false;
*
* if (tag == null)
* {
* return;
* }
*
* // These next few lines will create a payload (consisting of a string)
* // and a mimetype. NFC record are arrays of bytes.
* var payload = Encoding.ASCII.GetBytes("YeeSaurio");
* var mimeBytes = Encoding.ASCII.GetBytes("application/NFCFighters");
* var apeRecord = new NdefRecord(NdefRecord.TnfMimeMedia, mimeBytes, new byte[0], payload);
* var ndefMessage = new NdefMessage(new[] { apeRecord });
*
* if (!TryAndWriteToTag(tag, ndefMessage))
* {
* // Maybe the write couldn't happen because the tag wasn't formatted?
* TryAndFormatTagWithMessage(tag, ndefMessage);
* }
* }
*
* /*string[] techList = tag.GetTechList();
* info.Text = "";
* foreach (string tech in techList)
* {
* info.Text += "\n\t" + tech;
* }*/
NfcA nfca = NfcA.Get(tag);
NdefFormatable ndeff = NdefFormatable.Get(tag);
IsoDep iso = IsoDep.Get(tag);
MifareUltralight mifU = MifareUltralight.Get(tag);
/*try
* {
* nfca.Connect();
* short s = nfca.Sak;
* byte[] a = nfca.GetAtqa();
* string atqa = Encoding.ASCII.GetString(a);
* info.Text += "\nSAK = " + s + "\nATQA = " + atqa;
* nfca.Close();
* } catch (Exception e)
* {
* Toast.MakeText(this, "NfcA" + e.Message, ToastLength.Short).Show();
* }*/
/*try
* {
* iso.Connect();
*
* iso.Close();
* }
* catch (Exception e)
* {
* Toast.MakeText(this, "IsoDep" + e.Message, ToastLength.Short).Show();
* }*/
/*try
* {
* ndeff.Connect();
* //info.Text += "\nType: " + ndeff.GetType();
* //info.Text += "\nConnected: " + ndeff.IsConnected;
* var rawMsgs = intent.GetParcelableArrayExtra(NfcAdapter.ExtraNdefMessages);
* var msg = (NdefMessage)rawMsgs[0];
* var record = msg.GetRecords()[0];
*
* info.Text += "\n\tNdefFormatted: " + Encoding.ASCII.GetString(record.GetPayload());
* ndeff.Close();
* }
* catch (Exception e)
* {
* Toast.MakeText(this, "NdefFormatted " + e.Message, ToastLength.Short).Show();
* }*/
try
{
mifU.Connect();
byte[] mPag = mifU.ReadPages(12);
StringBuilder aux = new StringBuilder();
String cont_mpag = "";
for (int i = 0; i < mPag.Length; i++)
{
aux.Append(mPag[i]);
}
cont_mpag = aux.ToString();
//info.Text = Charset.AvailableCharsets().ToString();
//var mifM = new String(cont_mpag, Charset.ForName("US-ASCII"));
string mifM = Encoding.ASCII.GetString(mPag);
info.Text += "\nTu personaje es " + mifM;
mifU.Close();
}
catch (Exception e)
{
//Toast.MakeText(this, "MifareUltralight" + e.Message, ToastLength.Short).Show();
}
}