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);
}
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();
}
}
internal void CheckForNfcMessage(Intent intent)
{
if (!Enabled)
{
return;
}
if (intent.Action != NfcAdapter.ActionTechDiscovered)
{
return;
}
if (!(intent.GetParcelableExtra(NfcAdapter.ExtraTag) is Tag tag))
{
return;
}
try
{
var ev1 = MifareUltralight.Get(tag);
//TagDetected?.Invoke(tag);
ev1.Connect();
byte[] FirstTag = MainTabViewModel.Current?.DataBag.GetData();
byte[] mem = new byte[80];
for (int i = 0; i < 20; i += 4)
{
byte[] payload = ev1.ReadPages(i);
Buffer.BlockCopy(payload, 0, mem, 4 * i, 16);
}
if (WriteMode)
{
byte[] dstData = MainTabViewModel.MergeTagData(FirstTag, mem);
// password auth
// var response = ev1.Transceive(new byte[]{
// (byte) 0x1B, // PWD_AUTH
// 0,0,0,0 });
// Check if PACK is matching expected PACK
// This is a (not that) secure method to check if tag is genuine
//if ((response != null) && (response.Length >= 2))
//{
//}
for (int i = 4; i < 16; i++)
{
ev1.WritePage(i, dstData.Skip(4 * i).Take(4).ToArray());
}
MainTabViewModel.Current?.DataBag.SetData(dstData);
WriteMode = false;
}
else
{
MainTabViewModel.Current?.SetControlsVisibility(mem[41]);
MainTabViewModel.Current?.DataBag.SetData(mem);
}
ev1.Close();
MainTabViewModel.Current.cbNFCRead = false;
MainTabViewModel.Current.cbNFCWrite = false;
try
{
// Use default vibration length
Vibration.Vibrate();
}
catch (FeatureNotSupportedException ex)
{
// Feature not supported on device
}
catch (Exception ex)
{
// Other error has occurred.
}
}
catch (Exception e)
{
try
{
Vibration.Vibrate();
Thread.Sleep(1000);
Vibration.Vibrate();
}
catch (Exception ex)
{
// Other error has occurred.
}
}
}
