RecyclerDemoAdapter.java

package com.atguigu.recyclerviewdemo;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.ArrayList;

/**
 * 作者：尚硅谷-杨光福 on 2017/1/18 14:54
 * 微信：yangguangfu520
 * QQ号：541433511
 * 作用：RecyclerView的适配器
 */
public class RecyclerDemoAdapter extends RecyclerView.Adapter<RecyclerDemoAdapter.MyViewHolder> {

    private final Context mContext;
    private final ArrayList<String> datas;

    public RecyclerDemoAdapter(Context context, ArrayList<String> datas) {
        this.mContext = context;
        this.datas = datas;
    }

    /**
     * 得到数据的总数
     * @return
     */
    @Override
    public int getItemCount() {
        return datas.size();
    }



    /**
     * 创建ViewHolder
     * @param parent
     * @param viewType
     * @return
     */
    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new MyViewHolder(View.inflate(mContext,R.layout.item,null));
    }

    /**
     * 把数据绑定到ViewHolder上
     * @param holder
     * @param position
     */
    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        //1.根据位置得到数据
        String data = datas.get(position);
        //2.绑定数据
        holder.tv_name.setText(data);


    }




    /**
     * 添加数据
     * @param data
     */
    public void addData(int position,String data) {
        datas.add(position,data);
        //刷新数据
        notifyItemInserted(position);
    }

    /*
    删除数据
     */
    public void removewData(int positon) {
        datas.remove(positon);
        notifyItemRemoved(positon);
    }


    /**
     * ViewHolder
     */
    class MyViewHolder extends RecyclerView.ViewHolder{
        private ImageView iv_icon;
        private TextView tv_name;

        public MyViewHolder(View itemView) {
            super(itemView);
            iv_icon = (ImageView) itemView.findViewById(R.id.iv_icon);
            tv_name = (TextView) itemView.findViewById(R.id.tv_name);
            //设置item的点击事件
            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    //getLayoutPosition 把你点击的View的对应的位置
//                    Toast.makeText(mContext, "data=="+datas.get(getLayoutPosition()), Toast.LENGTH_SHORT).show();
                    if(listener != null){
                        listener.onItemClick(getLayoutPosition());
                    }
                }
            });
        }
    }

    /**
     * item点击的监听器
     */
    public interface OnItemClickListener{
        /**
         * 单点击item的时候回调
         * @param postion
         */
        public void  onItemClick(int postion);
    }

    private OnItemClickListener listener;

    /*
    设置item的点击监听
     */
    public void setOnItemClickListener(OnItemClickListener listener) {
        this.listener = listener;
    }
}