How to set header using http post method

i am currently working on one application.. in that application i have to use get and post both methods.. get method works properly but in post method suddenly i get the response like

   "invalid method.post required"..

my code for that is:

     String list_url = "************************";
    try {

        String appand = TimeStampForAuth.TimeStameMethod(main.this);
        String auth = android.util.Base64.encodeToString(("iphone" + ":" + 
            "2a5a262d5a")
        .getBytes("UTF-8"), andr开发者_开发问答oid.util.Base64.NO_WRAP);

        DefaultHttpClient client = new DefaultHttpClient();
        HttpPost post = new HttpPost(list_url+appand);

        Log.d("URL_LIST", list_url+appand);

        List nvps = new ArrayList();
        nvps.add(new BasicNameValuePair("login",Login));
        nvps.add(new BasicNameValuePair("password",password));
        nvps.add(new BasicNameValuePair("title",title));
        nvps.add(new BasicNameValuePair("category_id",cat_id));




        UrlEncodedFormEntity p_entity = new UrlEncodedFormEntity(nvps,HTTP.UTF_8);
        post.addHeader("Authorization", "Basic " + auth);
        post.setEntity(p_entity);
        HttpResponse response = client.execute(post);
        HttpEntity responseEntity = response.getEntity();
        String s = EntityUtils.toString(responseEntity);
        Log.d("List response", s);

    }
    catch(Exception e){
        System.out.println(e.toString());
    }

in that i am missing somethinf or what that i dont know..is all that thing is valid for post method....

please help me as early as possible...

thanking you.........

Try using setHeader() instead of addHeader()

You could try HttpClient 4.1 for Android: http://code.google.com/p/httpclientandroidlib/ (There are bugs in the HttpClient version 4.0 which Android uses.) You can also debug with it a little more with httpClient.log.enableDebug(true);

If you don't want to use an external library, I'd start debugging the network traffic. With a software called Wireshark you can see and inspect all Http Requests/Responses very easily.

For authorization I personally would use:

httpClient.getCredentialsProvider().setCredentials(
  new AuthScope(hostname, port), 
  new UsernamePasswordCredentials(user, pass));

use this instead:

   HttpURLConnection connection = (HttpsURLConnection) serviceURL.openConnection();
   connection.setRequestMethod("POST");