String error = ""; // string field
    private String getDataFromUrl(String demoIdUrl) {

        String result = null;
        int resCode;
        InputStream in;
        try {
            URL url = new URL(demoIdUrl);
            URLConnection urlConn = url.openConnection();

            HttpsURLConnection httpsConn = (HttpsURLConnection) urlConn;
            httpsConn.setAllowUserInteraction(false);
            httpsConn.setInstanceFollowRedirects(true);
            httpsConn.setRequestMethod("GET");
            httpsConn.connect();
            resCode = httpsConn.getResponseCode();

            if (resCode == HttpURLConnection.HTTP_OK) {
                in = httpsConn.getInputStream();

                BufferedReader reader = new BufferedReader(new InputStreamReader(
                        in, "iso-8859-1"), 8);
                StringBuilder sb = new StringBuilder();
                String line;
                while ((line = reader.readLine()) != null) {
                    sb.append(line).append("\n");
                }
                in.close();
                result = sb.toString();
            } else {
                error += resCode;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }