/// <summary>
/// Handle Android OnNewIntent
/// </summary>
/// <param name="intent">Android <see cref="Intent"/></param>
internal void HandleNewIntent(Intent intent)
{
if (intent == null)
{
return;
}
if (intent.Action == NfcAdapter.ActionTagDiscovered || intent.Action == NfcAdapter.ActionNdefDiscovered)
{
_currentTag = intent.GetParcelableExtra(NfcAdapter.ExtraTag) as Tag;
if (_currentTag != null)
{
var nTag = GetTagInfo(_currentTag);
if (_isWriting)
{
// Write mode
OnTagDiscovered?.Invoke(nTag, _isFormatting);
}
else
{
// Read mode
OnMessageReceived?.Invoke(nTag);
}
}
}
}
/// <summary>
/// Event raised when NFC tags are detected
/// </summary>
/// <param name="session">iOS <see cref="NFCTagReaderSession"/></param>
/// <param name="tags">Array of iOS <see cref="INFCTag"/></param>
public override void DidDetectTags(NFCTagReaderSession session, INFCTag[] tags)
{
_customInvalidation = false;
_tag = tags.First();
var connectionError = string.Empty;
session.ConnectTo(_tag, (error) =>
{
if (error != null)
{
connectionError = error.LocalizedDescription;
Invalidate(session, connectionError);
return;
}
var ndefTag = GetNdefTag(_tag);
if (ndefTag == null)
{
Invalidate(session, UIMessages.NFCErrorNotCompliantTag);
return;
}
ndefTag.QueryNdefStatus((status, capacity, error) =>
{
if (error != null)
{
Invalidate(session, error.LocalizedDescription);
return;
}
if (status == NFCNdefStatus.NotSupported)
{
Invalidate(session, UIMessages.NFCErrorNotSupportedTag);
return;
}
var identifier = GetTagIdentifier(ndefTag);
var nTag = new TagInfo(identifier)
{
IsWritable = status == NFCNdefStatus.ReadWrite
};
if (_isWriting)
{
// Write mode
OnTagDiscovered?.Invoke(nTag, _isFormatting);
}
else
{
// Read mode
ndefTag.ReadNdef((message, error) =>
{
if (error != null)
{
Invalidate(session, UIMessages.NFCErrorRead);
return;
}
if (message == null)
{
Invalidate(session, UIMessages.NFCErrorEmptyTag);
return;
}
session.AlertMessage = UIMessages.NFCSuccessRead;
nTag.Records = GetRecords(message.Records);
OnMessageReceived?.Invoke(nTag);
Invalidate(session);
});
}
});
});
}
/// <summary>
/// Event raised when NFC tags are detected
/// </summary>
/// <param name="session">iOS <see cref="NFCTagReaderSession"/></param>
/// <param name="tags">Array of iOS <see cref="INFCTag"/></param>
public override void DidDetectTags(NFCTagReaderSession session, INFCTag[] tags)
{
_customInvalidation = false;
_tag = tags.First();
var connectionError = string.Empty;
session.ConnectTo(_tag, (error) =>
{
if (error != null)
{
connectionError = error.LocalizedDescription;
Invalidate(session, connectionError);
return;
}
var ndefTag = GetNdefTag(_tag);
if (ndefTag == null)
{
Invalidate(session, Configuration.Messages.NFCErrorNotCompliantTag);
return;
}
ndefTag.QueryNdefStatus((status, capacity, error) =>
{
if (error != null)
{
Invalidate(session, error.LocalizedDescription);
return;
}
var isNdefSupported = status != NFCNdefStatus.NotSupported;
var identifier = GetTagIdentifier(ndefTag);
var nTag = new TagInfo(identifier, isNdefSupported)
{
IsWritable = status == NFCNdefStatus.ReadWrite,
Capacity = Convert.ToInt32(capacity)
};
if (!isNdefSupported)
{
session.AlertMessage = Configuration.Messages.NFCErrorNotSupportedTag;
OnMessageReceived?.Invoke(nTag);
Invalidate(session);
return;
}
if (_isWriting)
{
// Write mode
OnTagDiscovered?.Invoke(nTag, _isFormatting);
}
else
{
// Read mode
ndefTag.ReadNdef((message, error) =>
{
// iOS Error: NFCReaderError.NdefReaderSessionErrorZeroLengthMessage (NDEF tag does not contain any NDEF message)
// NFCReaderError.NdefReaderSessionErrorZeroLengthMessage constant should be equals to 403 instead of 304
// see https://developer.apple.com/documentation/corenfc/nfcreadererror/code/ndefreadersessionerrorzerolengthmessage
if (error != null && error.Code != 403)
{
Invalidate(session, Configuration.Messages.NFCErrorRead);
return;
}
session.AlertMessage = Configuration.Messages.NFCSuccessRead;
nTag.Records = GetRecords(message?.Records);
OnMessageReceived?.Invoke(nTag);
Invalidate(session);
});
}
});
});
}
