public class post extends AsyncTask<String, Void, String> {


    protected void onPreExecute() {

    }


    protected String doInBackground(String... arg0) {


        try {


            URL url = new URL("http://192.168.1.207/api/v2/xxxx/xxxx/cad_livro?fields=vl_pago%2Cvl_oferta%2Cid_user%2Cid_liv&filter=id_user%20%3D%20" + teste);

            JSONObject postDataParams = new JSONObject();

            HttpURLConnection conn = (HttpURLConnection) url.openConnection();

            conn.setRequestProperty("Content-type", "application/json");
            conn.setRequestMethod("POST");
            conn.setReadTimeout(15000 /* milliseconds */);
            conn.setConnectTimeout(15000 /* milliseconds */);
            conn.setDoInput(true);
            conn.setDoOutput(true);

            //ContentValues post = new ContentValues();

postDataParams.put("id_user_comp", idUser);
            postDataParams.put("vl_pago", mVl_anun);
            postDataParams.put("id_liv", id_livro);

            Log.e("resource", postDataParams.toString());


            JSONObject resource = new JSONObject();
            JSONArray array = new JSONArray();
            array.put(postDataParams);
            resource.put("resource", array);

            //   System.out.println("Resposta do server: "+ resource.toString());


            conn.connect();
            OutputStream os = conn.getOutputStream();
            BufferedWriter writer = new BufferedWriter(
                    new OutputStreamWriter(os, "UTF-8"));
            //writer.write(getPostDataString(postDataParams));
            writer.write(resource.toString());

            writer.flush();
            writer.close();
            os.close();


            int responseCode = conn.getResponseCode();

            if (responseCode == HttpsURLConnection.HTTP_OK) {