code: @TargetApi(Build.VERSION_CODES.GINGERBREAD)
      public static DownloadManager getDownloadManager(Context context) {
          return (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
      }
docs: Get the {@link android.app.DownloadManager} service for this context.
  @param context the context.
  @return the {@link android.app.DownloadManager}