how to solve http/1.1 401 unauthorized error

static String deviceID="30000000",controllerDeviceID="null",partnerMode=null,phoneNumber="9578010375",phoneOS="ICS",phoneModel="MotoG",createdOn="124566",status="Active";

Details details;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
      HttpAsyncTask h=new HttpAsyncTask();
      h.execute();
}
public static String POST(String url)
{

    InputStream inputStream=null;
    String json = "";
    String result=null;
   try {
       HttpClient httpClient=new DefaultHttpClient();
       HttpPost httpPost=new HttpPost(url);
       JSONObject jsonObject = new JSONObject();
       jsonObject.accumulate("DeviceID",deviceID);
       jsonObject.accumulate("ControllerPhoneNumber",controllerDeviceID);
       jsonObject.accumulate("PhoneNumber",phoneNumber);
       jsonObject.accumulate("DeviceOS",phoneOS);
       jsonObject.accumulate("DeviceModel",phoneModel);
       json=jsonObject.toString();
       StringEntity se=new StringEntity(json);
       httpPost.setEntity(se);
       se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
       httpPost.setHeader("Content-type", "application/json");
       HttpResponse httpResponse = httpClient.execute(httpPost);
       se.setContentEncoding(HTTP.UTF_8);
       inputStream = httpResponse.getEntity().getContent();
       Log.d("OUTPUT",httpResponse.getStatusLine().toString());
       if (inputStream!=null)
           result=convertInputStreamToString(inputStream);

       else
           result="Did not work";
   }
   catch (Exception e)
   {
       Log.v("InputStream",e.getLocalizedMessage());

   }
    return result;
}

private class HttpAsyncTask extends AsyncTask<string,void,string>

{

    @Override
    protected String doInBackground(String... urls) {
        POST(url);
        return null;
    }
    @Override
    protected void onPostExecute(String result)
    {
        Toast.makeText(getBaseContext(), "Data Sent!", Toast.LENGTH_LONG).show();
    }
}

private static String convertInputStreamToString(InputStream inputStream) throws IOException {
    BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));<code></code>
    String line = "";
    String result = "";
    while((line = bufferedReader.readLine()) != null)
        result += line;

    inputStream.close();
    return result;

}