Android学习随笔之ListView2【书上写的优化】

package net.sumuyu.adapter;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import net.sumuyu.act.R;
import net.sumuyu.entity.xx;
import java.util.List;
import java.util.PriorityQueue;

/**
 * Created by 时秋 on 2018/5/7.
 */

public class XXAdapterTwo extends ArrayAdapter<Xx>{

    private int resourceId;

    public XXAdapterTwo(Context context, int textViewResourceId, List<Xx> objects) {
        super(context, textViewResourceId,objects);
        resourceId=textViewResourceId;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        //Xx xx=getItem(position);
        View view;
        ViewHolder viewHolder;
        if (convertView==null){
            view= LayoutInflater.from(getContext()).inflate(resourceId,parent,false);
            viewHolder=new ViewHolder((ImageView)view.findViewById(R.id.xx_image),(TextView)view.findViewById(R.id.xx_name));
            view.setTag(viewHolder);
        }else{
            view=convertView;
            viewHolder=(ViewHolder)view.getTag();
        }
        viewHolder.xxImage.setImageResource(getItem(position).getImageId());
        viewHolder.xxName.setText(getItem(position).getName());
       /* ((TextView)view.findViewById(R.id.xx_name)).setText(xx.getName());
        ((ImageView)view.findViewById(R.id.xx_image)).setImageResource(xx.getImageId());*/
        return view;
    }
    class  ViewHolder{
      private  ImageView xxImage;
      private  TextView xxName;
        public  ViewHolder(ImageView img,TextView text){
            this.xxImage=img;
            this.xxName=text;
        }
    /*    public void setTitle(TextView text){
            this.xxName=text;
        }
        public void setImg(ImageView img){
            this.xxImage=img;
        }

        public TextView getTitle(){
            return this.xxName;
        }

        public ImageView getImg(){
            return this.xxImage;
        }*/

    }
}