/// <summary>
/// Returns the string formatted payload
/// </summary>
/// <param name="type">type of <see cref="NFCNdefTypeFormat"/></param>
/// <param name="payload">record payload</param>
/// <param name="uri">record uri</param>
/// <returns>String formatted payload</returns>
internal static string GetMessage(NFCNdefTypeFormat type, byte[] payload, string uri)
{
string message;
if (!string.IsNullOrWhiteSpace(uri))
{
message = uri;
}
else
{
if (type == NFCNdefTypeFormat.WellKnown)
{
// NDEF_WELLKNOWN Text record
var status = payload[0];
var enc = status & 0x80;
var languageCodeLength = status & 0x3F;
if (enc == 0)
{
message = Encoding.UTF8.GetString(payload, languageCodeLength + 1, payload.Length - languageCodeLength - 1);
}
else
{
message = Encoding.Unicode.GetString(payload, languageCodeLength + 1, payload.Length - languageCodeLength - 1);
}
}
else
{
// Other NDEF types
message = Encoding.UTF8.GetString(payload, 0, payload.Length);
}
}
return(message);
}
/// <summary>
/// Returns the string formatted payload
/// </summary>
/// <param name="type">type of <see cref="NFCNdefTypeFormat"/></param>
/// <param name="payload">record payload</param>
/// <param name="uri">record uri</param>
/// <returns>String formatted payload</returns>
internal static string GetMessage(NFCNdefTypeFormat type, byte[] payload, string uri)
{
var message = string.Empty;
if (!string.IsNullOrWhiteSpace(uri))
{
message = uri;
}
else
{
if (type == NFCNdefTypeFormat.WellKnown)
{
// NDEF_WELLKNOWN Text record
var languageCodeLength = payload[0] & 0x63;
message = Encoding.UTF8.GetString(payload, languageCodeLength + 1, payload.Length - languageCodeLength - 1);
}
else
{
// Other NDEF types
message = Encoding.UTF8.GetString(payload, 0, payload.Length);
}
}
return(message);
}
async void Publish(NFCNdefTypeFormat?type = null)
{
try
{
if (ChkReadOnly.IsChecked)
{
if (!await DisplayAlert("Warning", "Make a Tag read-only is permanent and can't be undone. Are you sure?", "Yes", "No"))
{
ChkReadOnly.IsChecked = false;
return;
}
_makeReadOnly = true;
}
else
{
_makeReadOnly = false;
}
if (type.HasValue)
{
_type = type.Value;
}
CrossNFC.Current.StartPublishing(!type.HasValue);
}
catch (System.Exception ex)
{
await ShowAlert(ex.Message);
}
}
async void Publish(NFCNdefTypeFormat?type = null)
{
try
{
if (type.HasValue)
{
_type = type.Value;
}
CrossNFC.Current.StartPublishing(!type.HasValue);
}
catch (System.Exception ex)
{
await ShowAlert(ex.Message);
}
}
