android recyclerview

package com.example.administrator.recyclerview;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;


import java.util.List;

public class myadapt extends RecyclerView.Adapter {
    private List<String> list;
    private Context mcontext;
    private String Tag="Tag";

    public myadapt(List<String> list, Context context) {
        this.list = list;
        this.mcontext = context;
    }

    public  interface OnItemClickListener{
        void onItemClick(View v,int pos);
    }

//设置监听器接口，mainactvity 实现接口
    private  OnItemClickListener onItemClickListener;

    public  void setOnItemClickListener(OnItemClickListener listener){
        onItemClickListener=listener;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
        LayoutInflater inflater = LayoutInflater.from(mcontext);
        return new myholder(inflater.inflate(R.layout.item,null),i);
    }

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder viewHolder, final int i) {
            if(viewHolder instanceof  myholder){
                final myholder holder=(myholder)viewHolder;
                holder.getTv().setText(list.get(i));
                holder.itemView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
onItemClickListener.onItemClick(viewHolder.itemView,i);
                    }
                });
            }
    }

    @Override
    public int getItemCount() {
        return list.size();
    }


    class myholder extends RecyclerView.ViewHolder {
        private TextView tv;
        private  int pos;
        public myholder(View itemView,int pos) {
            super(itemView);
            this.pos=pos;
            Log.i("Tag","myholder");
            tv = (TextView)itemView.findViewById(R.id.tv);
        }

        public int getPos(){return  pos;}
        public TextView getTv(){
            return tv;
        }
    }
}