Interface MediaHttpDownloaderProgressListener (1.34.1)

 public static class MyDownloadProgressListener implements MediaHttpDownloaderProgressListener {

   public void progressChanged(MediaHttpDownloader downloader) throws IOException {
     switch (downloader.getDownloadState()) {
       case MEDIA_IN_PROGRESS:
         System.out.println("Download in progress");
         System.out.println("Download percentage: " + downloader.getProgress());
         break;
       case MEDIA_COMPLETE:
         System.out.println("Download Completed!");
         break;
     }
   }
 }