private void Write(object sender, EventArgs e) { lock (this) { var label = FindViewById <TextView>(Resource.Id.DataLabel); try { if (nfcTag == null) { label.Text = "nfc tag is null"; return; } var data = DateTime.Now.ToString(); /* * var ndefRecord = new NdefRecord(NdefRecord.TnfMimeMedia, * null, * new byte[] { }, * Encoding.UTF8.GetBytes(data)); */ var ndefRecord = NdefRecord.CreateExternal( "Smartisan.Nfc.Smartisan.Nfc", // your domain name "myapp", // your type name Encoding.UTF8.GetBytes(data)); // payload var ndef = Ndef.Get(nfcTag); ndef.Connect(); ndef.WriteNdefMessage(new NdefMessage(ndefRecord)); ndef.Close(); label.Text = $"Data:{newLine}{data}"; } catch (Exception ex) { label.Text += $"{newLine} Exception: {newLine} {ex.Message} {newLine} {ex.StackTrace}"; } finally { if (nfcTag != null) { if (Ndef.Get(nfcTag).IsConnected) { Ndef.Get(nfcTag).Close(); } } } } }
/// <summary> /// Transforms a <see cref="NFCNdefRecord"/> into an Android <see cref="NdefRecord"/> /// </summary> /// <param name="record">Object <see cref="NFCNdefRecord"/></param> /// <returns>Android <see cref="NdefRecord"/></returns> NdefRecord GetAndroidNdefRecord(NFCNdefRecord record) { if (record == null) { return(null); } NdefRecord ndefRecord = null; switch (record.TypeFormat) { case NFCNdefTypeFormat.WellKnown: var languageCode = record.LanguageCode; if (string.IsNullOrWhiteSpace(languageCode)) { languageCode = Configuration.DefaultLanguageCode; } if (languageCode.Length > 5) { languageCode = languageCode.Substring(0, 5); //max support 5 chars like en-US or de-AT } ndefRecord = NdefRecord.CreateTextRecord(languageCode, Encoding.UTF8.GetString(record.Payload)); //no need to force it to 2 letters only //ndefRecord = NdefRecord.CreateTextRecord(languageCode.Substring(0, 2), Encoding.UTF8.GetString(record.Payload)); break; case NFCNdefTypeFormat.Mime: ndefRecord = NdefRecord.CreateMime(record.MimeType, record.Payload); break; case NFCNdefTypeFormat.Uri: ndefRecord = NdefRecord.CreateUri(Encoding.UTF8.GetString(record.Payload)); break; case NFCNdefTypeFormat.External: ndefRecord = NdefRecord.CreateExternal(record.ExternalDomain, record.ExternalType, record.Payload); break; case NFCNdefTypeFormat.Empty: ndefRecord = GetEmptyNdefRecord(); break; case NFCNdefTypeFormat.Unknown: case NFCNdefTypeFormat.Unchanged: case NFCNdefTypeFormat.Reserved: default: break; } return(ndefRecord); }
/// <summary> /// Transforms a <see cref="NFCNdefRecord"/> into an Android <see cref="NdefRecord"/> /// </summary> /// <param name="record">Object <see cref="NFCNdefRecord"/></param> /// <returns>Android <see cref="NdefRecord"/></returns> NdefRecord GetAndroidNdefRecord(NFCNdefRecord record) { if (record == null) { return(null); } NdefRecord ndefRecord = null; switch (record.TypeFormat) { case NFCNdefTypeFormat.WellKnown: var languageCode = record.LanguageCode; if (string.IsNullOrWhiteSpace(languageCode)) { languageCode = Configuration.DefaultLanguageCode; } ndefRecord = NdefRecord.CreateTextRecord(languageCode.Substring(0, 2), Encoding.UTF8.GetString(record.Payload)); break; case NFCNdefTypeFormat.Mime: ndefRecord = NdefRecord.CreateMime(record.MimeType, record.Payload); break; case NFCNdefTypeFormat.Uri: ndefRecord = NdefRecord.CreateUri(Encoding.UTF8.GetString(record.Payload)); break; case NFCNdefTypeFormat.External: ndefRecord = NdefRecord.CreateExternal(record.ExternalDomain, record.ExternalType, record.Payload); break; case NFCNdefTypeFormat.Empty: ndefRecord = GetEmptyNdefRecord(); break; case NFCNdefTypeFormat.Unknown: case NFCNdefTypeFormat.Unchanged: case NFCNdefTypeFormat.Reserved: default: break; } return(ndefRecord); }
/// <summary> /// Transforms a <see cref="NFCNdefRecord"/> into an Android <see cref="NdefRecord"/> /// </summary> /// <param name="record">Object <see cref="NFCNdefRecord"/></param> /// <returns>Android <see cref="NdefRecord"/></returns> NdefRecord GetAndroidNdefRecord(NFCNdefRecord record) { if (record == null) { return(null); } NdefRecord ndefRecord = null; switch (record.TypeFormat) { case NFCNdefTypeFormat.WellKnown: ndefRecord = NdefRecord.CreateTextRecord(Locale.Default.ToLanguageTag(), Encoding.UTF8.GetString(record.Payload)); break; case NFCNdefTypeFormat.Mime: ndefRecord = NdefRecord.CreateMime(record.MimeType, record.Payload); break; case NFCNdefTypeFormat.Uri: ndefRecord = NdefRecord.CreateUri(Encoding.UTF8.GetString(record.Payload)); break; case NFCNdefTypeFormat.External: ndefRecord = NdefRecord.CreateExternal(record.ExternalDomain, record.ExternalType, record.Payload); break; case NFCNdefTypeFormat.Empty: ndefRecord = GetEmptyNdefRecord(); break; case NFCNdefTypeFormat.Unknown: case NFCNdefTypeFormat.Unchanged: case NFCNdefTypeFormat.Reserved: default: break; } return(ndefRecord); }
public bool WriteExternalType(string domain, string type, string payload, object tag) { if (!(tag is Tag)) { return(false); } if (string.IsNullOrEmpty(domain) || string.IsNullOrEmpty(type) || string.IsNullOrEmpty(payload)) { return(false); } WriteResult writeResult = WriteResult.FAILED; try { NdefRecord extRecord = NdefRecord.CreateExternal(domain, type, Encoding.UTF8.GetBytes(payload)); NdefMessage ndefMessage = new NdefMessage(new NdefRecord[] { extRecord }); writeResult = WriteTag(ndefMessage, (Tag)tag); } catch { } return(writeResult == WriteResult.OK); }