private Downloader getDownloader(DownloadRequest request) {
   if (URLUtil.isHttpUrl(request.getSource()) || URLUtil.isHttpsUrl(request.getSource())) {
     return new HttpDownloader(request);
   }
   Log.e(TAG, "Could not find appropriate downloader for " + request.getSource());
   return null;
 }
    @Override
    public void run() {
      FeedImage image = DBReader.getFeedImage(DownloadService.this, request.getFeedfileId());
      if (image == null) {
        throw new IllegalStateException("Could not find downloaded image in database");
      }

      image.setFile_url(request.getDestination());
      image.setDownloaded(true);

      saveDownloadStatus(status);
      sendDownloadHandledIntent();
      DBWriter.setFeedImage(DownloadService.this, image);
      numberOfDownloads.decrementAndGet();
      queryDownloadsAsync();
    }
 @Override
 public void run() {
   if (request.isDeleteOnFailure()) {
     if (BuildConfig.DEBUG) Log.d(TAG, "Ignoring failed download, deleteOnFailure=true");
   } else {
     File dest = new File(request.getDestination());
     if (dest.exists() && request.getFeedfileType() == FeedMedia.FEEDFILETYPE_FEEDMEDIA) {
       Log.d(TAG, "File has been partially downloaded. Writing file url");
       FeedMedia media = DBReader.getFeedMedia(DownloadService.this, request.getFeedfileId());
       media.setFile_url(request.getDestination());
       try {
         DBWriter.setFeedMedia(DownloadService.this, media).get();
       } catch (InterruptedException e) {
         e.printStackTrace();
       } catch (ExecutionException e) {
         e.printStackTrace();
       }
     }
   }
 }
  /**
   * Updates the contents of the service's notifications. Should be called before
   * setupNotificationBuilders.
   */
  @SuppressLint("NewApi")
  private Notification updateNotifications() {
    String contentTitle = getString(R.string.download_notification_title);
    int numDownloads = requester.getNumberOfDownloads();
    String downloadsLeft;
    if (numDownloads > 0) {
      downloadsLeft = requester.getNumberOfDownloads() + getString(R.string.downloads_left);
    } else {
      downloadsLeft = getString(R.string.downloads_processing);
    }
    if (android.os.Build.VERSION.SDK_INT >= 16) {

      if (notificationBuilder != null) {

        StringBuilder bigText = new StringBuilder("");
        for (int i = 0; i < downloads.size(); i++) {
          Downloader downloader = downloads.get(i);
          final DownloadRequest request = downloader.getDownloadRequest();
          if (request.getFeedfileType() == Feed.FEEDFILETYPE_FEED) {
            if (request.getTitle() != null) {
              if (i > 0) {
                bigText.append("\n");
              }
              bigText.append("\u2022 " + request.getTitle());
            }
          } else if (request.getFeedfileType() == FeedMedia.FEEDFILETYPE_FEEDMEDIA) {
            if (request.getTitle() != null) {
              if (i > 0) {
                bigText.append("\n");
              }
              bigText.append(
                  "\u2022 " + request.getTitle() + " (" + request.getProgressPercent() + "%)");
            }
          }
        }
        notificationBuilder.setSummaryText(downloadsLeft);
        notificationBuilder.setBigContentTitle(contentTitle);
        if (bigText != null) {
          notificationBuilder.bigText(bigText.toString());
        }
        return notificationBuilder.build();
      }
    } else {
      if (notificationCompatBuilder != null) {
        notificationCompatBuilder.setContentTitle(contentTitle);
        notificationCompatBuilder.setContentText(downloadsLeft);
        return notificationCompatBuilder.build();
      }
    }
    return null;
  }
    private Feed parseFeed(DownloadRequest request) {
      Feed savedFeed = null;

      Feed feed = new Feed(request.getSource(), new Date());
      feed.setFile_url(request.getDestination());
      feed.setId(request.getFeedfileId());
      feed.setDownloaded(true);
      feed.setPreferences(
          new FeedPreferences(0, true, request.getUsername(), request.getPassword()));

      DownloadError reason = null;
      String reasonDetailed = null;
      boolean successful = true;
      FeedHandler feedHandler = new FeedHandler();

      try {
        feed = feedHandler.parseFeed(feed).feed;
        if (BuildConfig.DEBUG) Log.d(TAG, feed.getTitle() + " parsed");
        if (checkFeedData(feed) == false) {
          throw new InvalidFeedException();
        }

      } catch (SAXException e) {
        successful = false;
        e.printStackTrace();
        reason = DownloadError.ERROR_PARSER_EXCEPTION;
        reasonDetailed = e.getMessage();
      } catch (IOException e) {
        successful = false;
        e.printStackTrace();
        reason = DownloadError.ERROR_PARSER_EXCEPTION;
        reasonDetailed = e.getMessage();
      } catch (ParserConfigurationException e) {
        successful = false;
        e.printStackTrace();
        reason = DownloadError.ERROR_PARSER_EXCEPTION;
        reasonDetailed = e.getMessage();
      } catch (UnsupportedFeedtypeException e) {
        e.printStackTrace();
        successful = false;
        reason = DownloadError.ERROR_UNSUPPORTED_TYPE;
        reasonDetailed = e.getMessage();
      } catch (InvalidFeedException e) {
        e.printStackTrace();
        successful = false;
        reason = DownloadError.ERROR_PARSER_EXCEPTION;
        reasonDetailed = e.getMessage();
      }

      // cleanup();
      if (savedFeed == null) {
        savedFeed = feed;
      }

      if (successful) {
        return savedFeed;
      } else {
        saveDownloadStatus(
            new DownloadStatus(
                savedFeed,
                savedFeed.getHumanReadableIdentifier(),
                reason,
                successful,
                reasonDetailed));
        return null;
      }
    }
    @Override
    public void run() {
      FeedMedia media = DBReader.getFeedMedia(DownloadService.this, request.getFeedfileId());
      if (media == null) {
        throw new IllegalStateException("Could not find downloaded media object in database");
      }
      boolean chaptersRead = false;
      media.setDownloaded(true);
      media.setFile_url(request.getDestination());

      // Get duration
      MediaMetadataRetriever mmr = null;
      try {
        mmr = new MediaMetadataRetriever();
        mmr.setDataSource(media.getFile_url());
        String durationStr = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
        media.setDuration(Integer.parseInt(durationStr));
        if (BuildConfig.DEBUG) Log.d(TAG, "Duration of file is " + media.getDuration());
      } catch (NumberFormatException e) {
        e.printStackTrace();
      } catch (RuntimeException e) {
        e.printStackTrace();
      } finally {
        if (mmr != null) {
          mmr.release();
        }
      }

      if (media.getItem().getChapters() == null) {
        ChapterUtils.loadChaptersFromFileUrl(media);
        if (media.getItem().getChapters() != null) {
          chaptersRead = true;
        }
      }

      try {
        if (chaptersRead) {
          DBWriter.setFeedItem(DownloadService.this, media.getItem()).get();
        }
        DBWriter.setFeedMedia(DownloadService.this, media).get();
        if (!DBTasks.isInQueue(DownloadService.this, media.getItem().getId())) {
          DBWriter.addQueueItem(DownloadService.this, media.getItem().getId()).get();
        }
      } catch (ExecutionException e) {
        e.printStackTrace();
        status =
            new DownloadStatus(
                media,
                media.getEpisodeTitle(),
                DownloadError.ERROR_DB_ACCESS_ERROR,
                false,
                e.getMessage());
      } catch (InterruptedException e) {
        e.printStackTrace();
        status =
            new DownloadStatus(
                media,
                media.getEpisodeTitle(),
                DownloadError.ERROR_DB_ACCESS_ERROR,
                false,
                e.getMessage());
      }

      saveDownloadStatus(status);
      sendDownloadHandledIntent();

      numberOfDownloads.decrementAndGet();
      queryDownloadsAsync();
    }