Android : NetHttpBinding with Websocket - Android

I am trying to implement a WCF Websocket Service into a Xamarin Android Client application.

Is there any possibility to set the Channel Endpoint in any Android XML file? I am getting a

'A binding must be configured for this channel factory'

exception.

I defined the endpoint address in the web referenced wsdl-File:

<wsdl:service name="StockQuoteService">
<wsdl:port name="NetHttpBinding_IStockQuoteService" binding="tns:NetHttpBinding_IStockQuoteService">
  <soap12:address location="ws://IP-Address/WSWCFApp/Service.svc" />
  <wsa10:EndpointReference>
    <wsa10:Address>ws://IP-Address/WSWCFApp/Service.svc</wsa10:Address>
  </wsa10:EndpointReference>
</wsdl:port>

Does anybody know?