如何在Android中获得专辑缩略图?

private List<Album> getAlbums() {
Cursor cur = managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, null, null, null, null);
  List<Album> albums = new ArrayList<Album>();

  if (cur.moveToFirst()) {
   do {
    int albumIdIndex = cur.getColumnIndex(MediaStore.Audio.Media.ALBUM_ID);
    int albumIndex = cur.getColumnIndex(MediaStore.Audio.Media.ALBUM);
    int artistIndex = cur.getColumnIndex(MediaStore.Audio.Media.ARTIST);
    int albumId = cur.getInt(albumIdIndex);
    String name = cur.getString(albumIndex);
    String artist = cur.getString(artistIndex);
    LogUtil.i(TAG, "albumid= " + albumId + ", album= " + name + ", artist=" + artist);

    Album album = new Album(albumId, name, artist);
    if (!albums.contains(album)) {
     albums.add(album);
    }    
   } while (cur.moveToNext());

  }

  return albums;
 }

我知道我可以使用以下代码来获得实际的艺术品,但我需要缩略图,因为如果我在列表活动中使用完整图像,我的内存就会不足:

Uri sArtworkUri = Uri.parse("content://media/external/audio/albumart");
Uri uri = ContentUris.withAppendedId(sArtworkUri, album_id);

我看到这个帖子: Android media thumbnails. Serious issues? 但是我没有imageId,只有albumid,所以我觉得这没用。