Problema no Android.os.NetworkOnMainThreadException

class RetrieveFeedTask extends AsyncTask {



    private Exception exception;



    protected RSSFeed doInBackground(String... urls) {

        try {

            

        } catch (Exception e) {

            this.exception = e;



            return null;

        }

    }



    protected void onPostExecute(RSSFeed feed) {

        // TODO: check this.exception

        // TODO: do something with the feed

    }

}