code: public byte getStatus(final int id, final String path) {
          if (FileDownloader.getImpl().isServiceConnected()) {
              return FileDownloader.getImpl().getStatus(id, path);
          }
  
          if (path != null && new File(path).exists()) {
              return FileDownloadStatus.completed;
          }
  
          final ConnectSubscriber subscriber = new ConnectSubscriber() {
              private byte mValue;
  
              @Override
              public void connected() {
                  mValue = FileDownloader.getImpl().getStatus(id, path);
              }
  
              @Override
              public Object getValue() {
                  return mValue;
              }
          };
  
          wait(subscriber);
  
          return (byte) subscriber.getValue();
      }
docs: The {@link FileDownloader#getStatus(int, String)} request.