RecyclerView三种布局

布局===================================================================

mian_activity=============================================================

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

item===================================================================

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="match_parent"
    android:background="#ff00ff"
    android:layout_height="match_parent">
    <ImageView
        android:src="@mipmap/ic_launcher"
        android:layout_width="80dp"
        android:layout_height="80dp" />
    <TextView
        android:id="@+id/teach_item_name"
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="80dp" />
</LinearLayout>

代码===================================================================

package com.example.recyclerview;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.util.Log;

import java.util.ArrayList;
import java.util.List;


public class MainActivity extends AppCompatActivity implements RecyclerAdapter.OnItemClickListener {

    private static final String TAG = MainActivity.class.getSimpleName();
    private RecyclerView mRecyclerView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }
    private void initView() {
        mRecyclerView = (RecyclerView) findViewById(R.id.teach_recycler);
        //设置布局管理器
        //1、第一种LinearLayoutManager
      LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        //2、第二种 GridLayoutManager
    // GridLayoutManager layoutManager=new GridLayoutManager(this,3);
        //3、第三种
        //StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
//        //设置布局的排版方向
//        layoutManager.setOrientation(GridLayoutManager.HORIZONTAL);
        mRecyclerView.setLayoutManager(layoutManager);
        //绑定适配器
        RecyclerAdapter adapter = new RecyclerAdapter(this, getData());
        mRecyclerView.setAdapter(adapter);
        adapter.setOnItemClickListener(this);//将接口传递到数据产生的地方
    }

    /**
     * 获取数据源
     *
     * @return
     */
    public List<Modle> getData() {
        List<Modle> data = new ArrayList<>();
        for (int i = 0; i < 30; i++) {
            Modle model = new Modle();
            model.setName("猴子请来的都比---" + i);
            model.setHeight(((int) (Math.random() * 100 + 200)));
            data.add(model);
        }
        return data;
    }

    @Override
    public void onItemClick(int position, Modle model) {
        Log.e(TAG, "onItemClick: " + position);
    }
}

RecyclerView========================================================

package com.example.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;

/**
 * Created by 你家大林哥 on 2018/5/3.
 */

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> implements View.OnClickListener {
    private static final String TAG = RecyclerAdapter.class.getSimpleName();
    private List<Modle> data;
    private LayoutInflater inflater;
    private RecyclerView mRecyclerView;//用来计算Child位置
    private OnItemClickListener onItemClickListener;
    //对外提供接口初始化方法
    public void setOnItemClickListener(OnItemClickListener onItemClickListener){
        this.onItemClickListener=onItemClickListener;
    }

    public RecyclerAdapter(Context context, List<Modle> data) {
        this.data = data;
        inflater= (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public static class ViewHolder extends RecyclerView.ViewHolder{
        TextView name;

        public ViewHolder(View itemView) {
            super(itemView);
            name= (TextView) itemView.findViewById(R.id.teach_item_name);
        }
    }

    /**
     * 创建VIewHolder，导入布局，实例化itemView
     * @param parent
     * @param viewType
     * @return
     */
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = inflater.inflate(R.layout.item, parent, false);
        //导入itemView，为itemView设置点击事件
        itemView.setOnClickListener(this);
        return new ViewHolder(itemView);
    }

    /**
     * 绑定VIewHolder，加载数据
     * @param holder
     * @param position
     */
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.name.setText(data.get(position).getName());//加载数据
        ViewGroup.LayoutParams layoutParams = holder.itemView.getLayoutParams();
        layoutParams.height=data.get(position).getHeight();
        holder.itemView.setLayoutParams(layoutParams);
    }

    /**
     * 数据源的数量，item的个数
     * @return
     */
    @Override
    public int getItemCount() {
        return data!=null?data.size():0;
    }

    /**
     * 适配器绑定到RecyclerView 的时候，回将绑定适配器的RecyclerView 传递过来
     * @param recyclerView
     */
    @Override
    public void onAttachedToRecyclerView(RecyclerView recyclerView) {
        super.onAttachedToRecyclerView(recyclerView);
        mRecyclerView=recyclerView;
    }

    /**
     *
     * @param v 点击的View
     */
    @Override
    public void onClick(View v) {
        //RecyclerView可以计算出这是第几个Child
        int childAdapterPosition = mRecyclerView.getChildAdapterPosition(v);
        Log.e(TAG, "onClick: "+childAdapterPosition );
        if (onItemClickListener!=null) {
            onItemClickListener.onItemClick(childAdapterPosition,data.get(childAdapterPosition));
        }
    }

    /**
     * 接口回调
     * 1、定义接口，定义接口中的方法
     * 2、在数据产生的地方持有接口，并提供初始化方法，在数据产生的时候调用接口的方法
     * 3、在需要处理数据的地方实现接口，实现接口中的方法，并将接口传递到数据产生的地方
     */
    public interface OnItemClickListener{
        void onItemClick(int position,Modle model);


    }
}

Modle====================================================================

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package com.example.recyclerview;

/**
 * Created by 你家大林哥 on 2018/5/3.
 */

public class Modle {

    private String name;
    private int height;

    public int getHeight() {
        return height;
    }

    public void setHeight(int height) {
        this.height = height;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

依赖=====================================================================

compile 'com.android.support:recyclerview-v7:26.1.0'