/// <summary>
/// Reads the NDEF formatted data from the NFC tag.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <privilege>http://tizen.org/privilege/nfc</privilege>
/// <exception cref="NotSupportedException">Thrown when the NFC is not supported.</exception>
/// <exception cref="InvalidOperationException">Thrown when the method fails due to an invalid operation.</exception>
public Task <NfcNdefMessage> ReadNdefMessageAsync()
{
var task = new TaskCompletionSource <NfcNdefMessage>();
NfcNdefMessage ndefMsg = null;
Interop.Nfc.TagReadCompletedCallback callback = (int result, IntPtr ndefMessage, IntPtr userData) =>
{
if (result == (int)NfcError.None)
{
ndefMsg = new NfcNdefMessage(ndefMessage);
task.SetResult(ndefMsg);
return(true);
}
return(false);
};
int ret = Interop.Nfc.Tag.ReadNdef(_tagHandle, callback, IntPtr.Zero);
if (ret != (int)NfcError.None)
{
Log.Error(Globals.LogTag, "Failed to read ndef message, Error - " + (NfcError)ret);
NfcErrorFactory.ThrowNfcException(ret);
}
return(task.Task);
}
bool ReadNdefCallback(int result, IntPtr ndefMessage, IntPtr userData)
{
bool ret = false;
int requestId = (int)userData;
if (_readNdefTaskSource.ContainsKey(requestId))
{
if (result == (int)NfcError.None)
{
var ndefMsg = new NfcNdefMessage(ndefMessage);
_readNdefTaskSource[requestId].TrySetResult(ndefMsg);
ret = true;
}
_readNdefTaskSource.Remove(requestId);
}
return(ret);
}
/// <summary>
/// Writes the NDEF formatted data.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <param name="ndefMessage">The NfcNdefMessage object.</param>
/// <privilege>http://tizen.org/privilege/nfc</privilege>
/// <exception cref="NotSupportedException">Thrown when the NFC is not supported.</exception>
/// <exception cref="ArgumentException">Thrown when the method fails due to an invalid parameter.</exception>
/// <exception cref="InvalidOperationException">Thrown when the method fails due to an invalid operation.</exception>
public Task <NfcError> WriteNdefMessageAsync(NfcNdefMessage ndefMessage)
{
var task = new TaskCompletionSource <NfcError>();
Interop.Nfc.VoidCallback callback = (int result, IntPtr userData) =>
{
task.SetResult((NfcError)result);
return;
};
int ret = Interop.Nfc.Tag.WriteNdef(_tagHandle, ndefMessage.GetHandle(), callback, IntPtr.Zero);
if (ret != (int)NfcError.None)
{
Log.Error(Globals.LogTag, "Failed to write ndef message, Error - " + (NfcError)ret);
NfcErrorFactory.ThrowNfcException(ret);
}
return(task.Task);
}
/// <summary>
/// Writes the NDEF formatted data.
/// </summary>
/// <since_tizen> 3 </since_tizen>
/// <param name="ndefMessage">The NfcNdefMessage object.</param>
/// <privilege>http://tizen.org/privilege/nfc</privilege>
/// <exception cref="NotSupportedException">Thrown when the NFC is not supported.</exception>
/// <exception cref="ArgumentException">Thrown when the method fails due to an invalid parameter.</exception>
/// <exception cref="InvalidOperationException">Thrown when the method fails due to an invalid operation.</exception>
public Task <NfcError> WriteNdefMessageAsync(NfcNdefMessage ndefMessage)
{
int requestId = 0;
var task = new TaskCompletionSource <NfcError>();
lock (this)
{
requestId = _requestId++;
_voidTaskSource[requestId] = task;
}
int ret = Interop.Nfc.Tag.WriteNdef(_tagHandle, ndefMessage.GetHandle(), _nativeVoidCallback, (IntPtr)requestId);
if (ret != (int)NfcError.None)
{
Log.Error(Globals.LogTag, "Failed to write ndef message, Error - " + (NfcError)ret);
_voidTaskSource.Remove(requestId);
NfcErrorFactory.ThrowNfcException(ret);
}
return(task.Task);
}
internal P2pDataReceivedEventArgs(IntPtr p2pHandle, IntPtr ndefHandle)
{
_p2pTarget = new NfcP2p(p2pHandle);
_ndefMessage = new NfcNdefMessage(ndefHandle);
}
internal NdefMessageDiscoveredEventArgs(IntPtr messageHandle)
{
_ndef = new NfcNdefMessage(messageHandle);
}
