/** add by yejc 20130527 end */
  public JSONObject sendRequest(final String content, String url) {
    NetworkManager nM = new NetworkManager(this.mContext);

    JSONObject jsonResponse = null;
    try {
      String response = null;
      synchronized (nM) {
        response = nM.SendAndWaitResponse(content, url /*Constants.server_url*/);
      }

      jsonResponse = new JSONObject(response);
    } catch (Exception e) {
      e.printStackTrace();
    }

    if (jsonResponse != null) BaseHelper.log(TAG, jsonResponse.toString());

    return jsonResponse;
  }