private static String receiveFromBackEnd(String url, List<BasicNameValuePair> list) throws IOException, JSONException {
StringBuilder str = new StringBuilder();
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url+"?"+ URLEncodedUtils.format(list,"utf-8"));
httpGet.addHeader(new BasicHeader("Content-Type",
"application/json"));
HttpResponse response = httpclient.execute(httpGet);
BufferedReader reader = new BufferedReader(new InputStreamReader(
response.getEntity().getContent()));
String line;
while ((line = reader.readLine()) != null) {
str.append(line);
}
return str.toString();
}