UrlConnectionDownloader.java 文件源码

static Object install(Context context) throws IOException {
  File cacheDir = Utils.createDefaultCacheDir(context);
  HttpResponseCache cache = HttpResponseCache.getInstalled();
  if (cache == null) {
    long maxSize = Utils.calculateDiskCacheSize(cacheDir);
    cache = HttpResponseCache.install(cacheDir, maxSize);
  }
  return cache;
}