public void setSelectedMedias(List<BaseMedia> selectedMedias) {
        if (selectedMedias == null) {
            return;
        }
        mSelectedMedias.clear();
        mSelectedMedias.addAll(selectedMedias);
        notifyDataSetChanged();
    }
A RecyclerView.Adapter for image or video picker showing.

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