Android零基础入门第66节：RecyclerView点击事件处理

package com.jinyu.cqkxzsxy.android.advancedviewsample.adapter;

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

import com.jinyu.cqkxzsxy.android.advancedviewsample.R;

import java.util.ArrayList;

/**
 * @创建者 鑫鱻
 * @描述 Android零基础入门到精通系列教程
 * 首发微信公众号分享达人秀（ShareExpert）
 */
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder> {
    private ArrayList<String> mDatas = null;
    private LayoutInflater mInflater = null;
    private OnItemClickListener mOnItemClickListener = null;
    private OnItemLongClickListener mOnItemLongClickListener = null;

    public RecyclerViewAdapter(Context context, ArrayList<String> datas) {
        this.mDatas = datas;
        this.mInflater = LayoutInflater.from(context);
    }

    // 创建新View，被LayoutManager所调用
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = mInflater.inflate(R.layout.recyclerview_item, parent, false);
        ViewHolder vewHolder = new ViewHolder(view);
        return vewHolder;
    }

    // 将数据与界面进行绑定的操作
    @Override
    public void onBindViewHolder(final ViewHolder holder, final int position) {
        String name = mDatas.get(position);
        holder.titleTv.setText("Title " + name);
        holder.contenTv.setText("content " + name);

        // 点击事件注册及分发
        if(null != mOnItemClickListener) {
            holder.titleTv.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mOnItemClickListener.onClick(holder.titleTv, position);
                }
            });
            holder.contenTv.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mOnItemClickListener.onClick(holder.contenTv, position);
                }
            });
        }
        // 长按事件注册及分发
        if(null != mOnItemLongClickListener) {
            holder.titleTv.setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {
                    return mOnItemLongClickListener.onLongClick(holder.titleTv, position);
                }
            });
            holder.contenTv.setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {
                    return mOnItemLongClickListener.onLongClick(holder.contenTv, position);
                }
            });
        }
    }

    // 获取数据的数量
    @Override
    public int getItemCount() {
        return mDatas == null ? 0 : mDatas.size();
    }

    // 设置点击事件
    public void setOnItemClickListener(OnItemClickListener l) {
        this.mOnItemClickListener = l;
    }

    // 设置长按事件
    public void setOnItemLongClickListener(OnItemLongClickListener l) {
        this.mOnItemLongClickListener = l;
    }

    // 点击事件接口
    public interface OnItemClickListener {
        void onClick(View parent, int position);
    }

    // 长按事件接口
    public interface OnItemLongClickListener {
        boolean onLongClick(View parent, int position);
    }

    // 自定义的ViewHolder，持有每个Item的的所有界面组件
    public class ViewHolder extends RecyclerView.ViewHolder {
        public TextView titleTv = null;
        public TextView contenTv = null;

        public ViewHolder(View itemView) {
            super(itemView);

            titleTv = (TextView) itemView.findViewById(R.id.title_tv);
            contenTv = (TextView) itemView.findViewById(R.id.content_tv);
        }
    }
}

package com.jinyu.cqkxzsxy.android.advancedviewsample;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;

import com.jinyu.cqkxzsxy.android.advancedviewsample.adapter.RecyclerViewAdapter;
import com.jinyu.cqkxzsxy.android.advancedviewsample.view.RecyclerViewItemDivider;

import java.util.ArrayList;

/**
 * @创建者 鑫鱻
 * @描述 Android零基础入门到精通系列教程，欢迎关注微信公众号ShareExpert
 */
public class RecyclerViewActivity extends AppCompatActivity implements
        RecyclerViewAdapter.OnItemClickListener,
        RecyclerViewAdapter.OnItemLongClickListener {
    private RecyclerView mRecyclerView = null;
    private RecyclerViewAdapter mAdapter = null;
    private ArrayList<String> mDatas = null;
    
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.recyclerview_layout);

        // 获取组件
        mRecyclerView = (RecyclerView) findViewById(R.id.recyclerview);

        // 设置管理器
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        mRecyclerView.setLayoutManager(layoutManager);
        // 自定义分割线
        RecyclerView.ItemDecoration itemDecoration = new RecyclerViewItemDivider(this,
                R.drawable.recyclerview_item_divider);
        mRecyclerView.addItemDecoration(itemDecoration);
        // 如果可以确定每个item的高度是固定的，设置这个选项可以提高性能
        mRecyclerView.setHasFixedSize(true);

        // 初始化列表数据
        initDatas();

        // 设置适配器
        mAdapter = new RecyclerViewAdapter(this, mDatas);
        mAdapter.setOnItemClickListener(this);
        mAdapter.setOnItemLongClickListener(this);
        mRecyclerView.setAdapter(mAdapter);
    }

    private void initDatas() {
        mDatas = new ArrayList<>();

        for (int i = 0; i < 50; i++) {
            mDatas.add(i, i + 1 + "");
        }
    }

    @Override
    public void onClick(View parent, int position) {
        Toast.makeText(this, "点击了第" + (position + 1) + "项", Toast.LENGTH_SHORT).show();
    }

    @Override
    public boolean onLongClick(View parent, int position) {
        Toast.makeText(this, "长压了第" + (position + 1) + "项", Toast.LENGTH_SHORT).show();
        return true;
    }
}