udacity alumni graphql query

 List<NameValuePair> someVariable = new ArrayList<NameValuePair>();
    nameValuePairs.add(new BasicNameValuePair("query", "{articles{id}}"));

    HttpClient httpclient=new DefaultHttpClient();
    HttpPost httppost = new HttpPost("http://udacity-alumni-api.herokuapp.com/graphql");
    httppost.setHeader(HTTP.CONTENT_TYPE,"application/x-www-form-urlencoded;charset=UTF-8");

    try {
        httppost.setEntity(new UrlEncodedFormEntity(someVariable, "UTF-8"));
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }

    // Execute HTTP Post Request
    try {
        HttpResponse response = httpclient.execute(httppost);
        Log.d("Response:" , response.toString());
    } catch (IOException e) {
        e.printStackTrace();
    }