Android之RecycleView

需要导入依赖包

RecycleView布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.bwie.recyclerviewdemo.MainActivity">    <android.support.v7.widget.RecyclerView        android:id="@+id/recyclerView"        android:layout_width="match_parent"        android:layout_height="match_parent">    </android.support.v7.widget.RecyclerView></LinearLayout>

自定义RecycleView布局(item)

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="vertical">    <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:background="@mipmap/ic_launcher"/>    <TextView        android:id="@+id/tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Hello RecyclerView"/></LinearLayout>

MainActivity代码

package com.bwie.recyclerviewdemo;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.support.v7.widget.DividerItemDecoration;import android.support.v7.widget.GridLayoutManager;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.View;import android.widget.Toast;public class MainActivity extends AppCompatActivity implements MyAdapter.OnItemClickListener {    private RecyclerView recyclerView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        recyclerView = findViewById(R.id.recyclerView);        //设置一个线性布局管理器        //HORIZONTAL 设置水平方向  垂直方向   false true  true 反转 倒着显示  false 顺序显示        recyclerView.setLayoutManager(new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false));        //设置一个网格管理器        //Vertical 代表显示多少列        //Horizontal 代表显示多少行        //recyclerView.setLayoutManager(new GridLayoutManager(this,3,GridLayoutManager.HORIZONTAL,false));        //设置分割线        recyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));        //设置适配器        MyAdapter adapter = new MyAdapter(this);        recyclerView.setAdapter(adapter);        //设置点击事件        adapter.setOnItemClickListener(this);    }    @Override    public void setOnItemClick(View view, int position) {        //条目点击事件        Toast.makeText(this, "条目" + position, Toast.LENGTH_SHORT).show();    }    @Override    public void setOnItemLongClick(View view, int position) {        //长按事件        Toast.makeText(this, "长按条目"+position, Toast.LENGTH_SHORT).show();    }}

MyAdapter适配器

package com.bwie.recyclerviewdemo;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 org.w3c.dom.Text;/** * Created by stephen on 2017/12/7. */public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {    private Context context;    public MyAdapter(Context context){        this.context = context;    }    /**     *     * @param parent     * @param viewType     * @return     */    @Override    public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = LayoutInflater.from(context).inflate(R.layout.item,parent,false);        ViewHolder viewHolder = new ViewHolder(view);        return viewHolder;    }    //生命自己的一个事件回调接口    public interface OnItemClickListener{        //条目点击事件        void setOnItemClick(View view,int position);        //条目长按事件        void setOnItemLongClick(View view,int position);    }    private OnItemClickListener onItemClickListener;    public void setOnItemClickListener(OnItemClickListener onItemClickListener){        this.onItemClickListener = onItemClickListener;    }    @Override    public void onBindViewHolder(MyAdapter.ViewHolder holder, final int position) {

        if(position %2 == 0) {            //设置文本            holder.tv.setText("默认偶数行死数据");        }else{            holder.tv.setText("默认奇数行死数据");        }        if(null != onItemClickListener)        {            //回调点击事件            holder.itemView.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    //回调                    onItemClickListener.setOnItemClick(v,position);                }            });            holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {                @Override                public boolean onLongClick(View v) {                    onItemClickListener.setOnItemLongClick(v,position);                    return true;//消费掉                }            });        }    }    @Override    public int getItemCount() {//条目数        return 20;    }    //生命我们自己的ViewHolder    class ViewHolder extends RecyclerView.ViewHolder{        TextView tv;        //View itemViews;        public ViewHolder(View itemView) {            super(itemView);            //itemViews = itemView;            tv = itemView.findViewById(R.id.tv);        }    }}