VolleyErrorHelper.java 文件源码

/**
 * Handles the server error, tries to determine whether to show a stock message or to
 * show a message retrieved from the server.
 *
 * @param err Volley error
 * @param context Context
 * @return String
 */
private static String handleServerError(Object err, Context context) {
    VolleyError error = (VolleyError) err;

    NetworkResponse response = error.networkResponse;

    if (response != null) {
        switch (response.statusCode) {
            case 404:
            case 422:
            case 400:
            case 401:

                try {
                    String string = new String(error.networkResponse.data);
                    JSONObject object = new JSONObject(string);
                    if (object.has("message")) {
                        return object.get("message").toString();
                    }
                    else if(object.has("error_description")) {
                        return object.get("error_description").toString();
                    }
                }catch (JSONException e)
                {
                    return "Could not parse response";
                }
                // invalid request
                return error.getMessage();

            default:
                return ERR_UNKNOWN_STATUS_CODE;
        }
    }
    return ERR_GENERIC;
}