import com.google.gdata.client.uploader.ProgressListener; //导入依赖的package包/类
/**
 * Constructor to update a media with progress update.  Use {@link Builder}
 * to construct this instance.
 *
 * @param uploadUrl resumable media upload url.
 * @param file media file to upload.
 * @param service {@link MediaService} for target service.
 * @param chunkSize max chunk size in bytes to include in each request.
 * @param executor resource pool to execute upload task.
 * @param progressListener callback to listen to progress updates.
 * @param progressIntervalMillis how often to notify about update progress.
 * @throws IOException any read/write error
 * @throws ServiceException any service specific error
 */
private ResumableGDataFileUploader(URL uploadUrl, MediaFileSource file,
    MediaService service, long chunkSize, ExecutorService executor,
    ProgressListener progressListener, long progressIntervalMillis)
    throws IOException, ServiceException {
  super(uploadUrl, file.getMediaFile(), executor, progressListener, chunkSize,
      progressIntervalMillis);
  this.service = service;
}
 

import com.google.gdata.client.uploader.ProgressListener; //导入依赖的package包/类
/**
 * Sets parameters to track upload progress.
 *
 * @param listener {@link ProgressListener} callback for tracking progress.
 * @param progressInterval time interval in millis for progress
 *        notifications.
 * @return builder.
 */
public Builder trackProgress(
    ProgressListener listener, long progressInterval) {
  this.listener = listener;
  this.progressInterval = progressInterval;
  return this;
}