private static String error(String format, Object... args) {
    return String.format(Locale.getDefault(), format, args);
  }
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