title: Prase 401 volley error message
body: <p>How to parse 401 response data for volley,here is the server response am getting i haev used volley network response but its not able to get response data which is in JSON format</p>
  
  <pre><code>Status 200 OK 
  {
      alert: {
          title: "Unauthorised access to appointment"
          message: ""
      }-
      response: "0"
  }
  
  
  
  new Response.ErrorListener() {
      @Override
      public void onErrorResponse(VolleyError error) {
          Log.e(TAG, "Req Failed!");
          mProgressDialog.dismiss();
          NetworkResponse localNetworkResponse = error.networkResponse;
          if (localNetworkResponse != null) {
              if (!WebAPIEngine.checkStatusCodeVolley(localNetworkResponse.statusCode)) {
                  AlertDialogUtil.displayErrorAlert(error.toString(), mContext);
              }
          } else {
              Log.e(TAG, error.toString());
              try {
                  JSONObject jsonObject = new JSONObject(error.getMessage());
                      if (WebAPIEngine.processErrorAlertResp(jsonObject)) {
                          AlertDialogUtil.displayErrorAlert(WebAPIEngine.getErrorMessage(), mContext);
                      } else {
                          AlertDialogUtil.displayErrorAlert(error.toString(), mContext);
                      }
                  } 
              catch (Exception e) { e.printStackTrace(); }
          }
      }
  });
  </code></pre>