public final void checkSelectedMedia(List<BaseMedia> allMedias, List<BaseMedia> selectedMedias) {
        mPresenter.checkSelectedMedia(allMedias, selectedMedias);
    }
in {@link BoxingConfig.Mode#MULTI_IMG}, call this to pick the selected medias in all medias.
boxing/src/main/java/com/bilibili/boxing/AbsBoxingViewFragment.java