android databinding recyclerview多种itembinding

// 数据列表public ObservableList<JobRecommendInfo> items = new ObservableArrayList<>();// 子item
public ItemViewSelector<JobRecommendInfo> itemView = new ItemViewSelector<JobRecommendInfo>() {    @Override    public void select(ItemView itemView, int position, JobRecommendInfo item) {        itemView.set(BR.recommendInfo, position ==                items.size() - 1 ? R.layout.item_job_recommend_add :                R.layout.item_job_recommend);    }    @Override    public int viewTypeCount() {        return 2;    }};