Android Send data back to server

How would one go about sending data back to server, from an android application?

I've already tried using HttpPost and posted back to a RESTful WCF service, but I couldnt get that to work (I've already created a SO question about this, without finding the solution..) - No matter what I do I keep getting 405 Method not allowed or the 400 Bad Request.. :(

I'm n开发者_开发问答ot asking for full code example necessarily.. just a pointer in a direction, which can enable me to send data back to a server.

It is important that the user should not have to allow or dismiss the transfer.. it should happen under the covers, so to speak

Thanks in advance

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Services is the way to go. REST (I recommend this one on Android), or SOAP based. There're loads of tutorials on getting an android app communicate a service, even with .net / wcf ones.

Tho you can always just open raw sockets and send data with some custom protocol.

Edit:

Here's the doInBackground part of my asynctask handling http post communication, maybe that'll help:

protected String doInBackground(String... req) {

        Log.d(TAG, "Message to send: "+req[0]);
        HttpPost p = new HttpPost(url);

        try{
            p.setEntity(new StringEntity(req[0], "UTF8"));
        }catch(Exception e){
            e.printStackTrace();
        }
        p.setHeader("Content-type", "application/json");

        String response = "";
        try{
            HttpResponse resp = hc.execute(p, localContext);
            InputStream is = resp.getEntity().getContent();
            response = convertStreamToString(is);
            Log.d("Response", "Response is " + response);
        } catch (Exception e){
            e.printStackTrace();
        }

        return response;
     }