private void getAlbumList(@NonNull final IAlbumTaskCallback callback) {
        mDefaultAlbum.mCount = 0;
        List<AlbumEntity> tmpList = new ArrayList<>();
        if (mBucketMap == null) {
            postAlbums(callback, tmpList);
            return;
        }
        for (Map.Entry<String, AlbumEntity> entry : mBucketMap.entrySet()) {
            tmpList.add(entry.getValue());
            mDefaultAlbum.mCount += entry.getValue().mCount;
        }
        if (tmpList.size() > 0 && tmpList.get(0) != null) {
            mDefaultAlbum.mImageList = tmpList.get(0).mImageList;
            tmpList.add(0, mDefaultAlbum);
        }
        postAlbums(callback, tmpList);
        clear();
    }
get the cover and count

@param buckId album id
boxing/src/main/java/com/bilibili/boxing/model/task/impl/AlbumTask.java