BaseViewHolder这样封装有哪些优势？

package com.example.arial.dgamedetail.view;

import android.util.SparseArray;
import android.view.View;

/**
 * Created by John on 2017/3/6.
 */

public class BaseViewHolder {
    public static <T extends View>T get(View view,int id){

        SparseArray<View> viewHolder= (SparseArray<View>) view.getTag();
        if(viewHolder==null)
        {
            viewHolder=new SparseArray<View>();
            view.setTag(viewHolder);
        }
        View childView = viewHolder.get(id);
        if (childView == null) {
            childView = view.findViewById(id);
            viewHolder.put(id, childView);
        }

        return (T) childView;
    }
}