public void addAllData(@NonNull List<BaseMedia> data) {
        int oldSize = mMedias.size();
        this.mMedias.addAll(data);
        int size = data.size();
        notifyItemRangeInserted(oldSize, size);
    }
A RecyclerView.Adapter for image or video picker showing.

@author ChenSL
boxing-impl/src/main/java/com/bilibili/boxing_impl/adapter/BoxingMediaAdapter.java