private static boolean isHttpSuccess(int responseCode) {
    return (responseCode >= HttpURLConnection.HTTP_OK
        && responseCode < HttpURLConnection.HTTP_MULT_CHOICE);
  }
Network fetcher that uses the simplest Android stack.

<p>Apps requiring more sophisticated networking should implement their own {@link
NetworkFetcher}.
imagepipeline/src/main/java/com/facebook/imagepipeline/producers/HttpUrlConnectionNetworkFetcher.java