RecyclerView添加两种布局

简介：

　　本篇博客主要介绍如何在RecyclerView中添加两种布局

　　思路：主要重写Recyclerview.Adapter中的一些方法

　　1.public int getItemViewType(int position)   获取不同的type

　　2.public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType)  根据不同的viewType   添加不同的布局

案例：

1.布局

1)activity_main.xml

　　

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView

        android:id="@+id/recyclerview"

        android:layout_width="match_parent"

        android:layout_height="match_parent"></android.support.v7.widget.RecyclerView>

</RelativeLayout>

2)第一种子布局item_recyclerview

　　

<?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"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:orientation="vertical">

    <android.support.v7.widget.CardView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        app:cardCornerRadius="5dp"

        app:contentPadding="5dp"

        app:cardBackgroundColor="#44ff0000"

        android:layout_margin="5dp"

        >

        <LinearLayout

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:orientation="horizontal"

            >

            <ImageView

                android:layout_width="48dp"

                android:layout_height="48dp"

                android:id="@+id/img"

                />

            <LinearLayout

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:orientation="vertical"

                android:layout_marginLeft="10dp"

                android:gravity="center_vertical"

                >

                <TextView

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content"

                    android:id="@+id/tv1"

                    android:maxLines="1"

                    android:ellipsize="end"

                    />

                <TextView

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content"

                    android:id="@+id/tv2"

                    android:maxLines="1"

                    android:ellipsize="end"

                    />

            </LinearLayout>

        </LinearLayout>

    </android.support.v7.widget.CardView>

</LinearLayout>

2)第二种子布局item_recyclerview2

　　

<?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"

    android:layout_width="match_parent"

    android:layout_height="wrap_content"

    android:orientation="vertical">

    <android.support.v7.widget.CardView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        app:cardCornerRadius="5dp"

        app:contentPadding="5dp"

        app:cardBackgroundColor="#4400ff00"

        android:layout_margin="5dp"

        >

        <LinearLayout

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:orientation="horizontal"

            >

            <LinearLayout

                android:layout_width="0dp"

                android:layout_height="match_parent"

                android:layout_weight="1"

                android:orientation="vertical"

                android:layout_marginRight="10dp"

                android:gravity="center_vertical"

                >

                <TextView

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content"

                    android:id="@+id/tv1"

                    android:maxLines="1"

                    android:ellipsize="end"

                    />

                <TextView

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content"

                    android:id="@+id/tv2"

                    android:maxLines="1"

                    android:ellipsize="end"

                    />

            </LinearLayout>

            <ImageView

                android:layout_width="48dp"

                android:layout_height="48dp"

                android:id="@+id/img"

                />

        </LinearLayout>

    </android.support.v7.widget.CardView>

</LinearLayout>

2.数据 Person类

　　

package com.example.dhj.recyclerviewtest;

/**

 * Created by Administrator on 2017/7/31 0031.

 */

public class Person {

    private int age;

    private String name;

    private String detail;

    private int imgId;

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getDetail() {

        return detail;

    }

    public void setDetail(String detail) {

        this.detail = detail;

    }

    public int getImgId() {

        return imgId;

    }

    public void setImgId(int imgId) {

        this.imgId = imgId;

    }

}

3.适配器MyAdapter

　　

package com.example.dhj.recyclerviewtest;

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.ImageView;

import android.widget.TextView;

import java.util.List;

/**

 * Created by Administrator on 2017/7/31 0031.

 */

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {

    private Context context;

    private List<Person> datas;

    private static final int ITEM_ONE=1;

    private static final int ITEM_TWO=2;

    public MyAdapter(Context context, List<Person> datas) {

        this.context = context;

        this.datas = datas;

    }

    @Override

    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View view;

        if(viewType==ITEM_ONE){

            view= LayoutInflater.from(context).inflate(R.layout.item_recyclerview,parent,false);

        }else{

            view=LayoutInflater.from(context).inflate(R.layout.item_recyclerview2,parent,false);

        }

        ViewHolder vh=new ViewHolder(view);

        return vh;

    }

    @Override

    public void onBindViewHolder(ViewHolder holder, int position) {

        holder.img.setBackgroundResource(datas.get(position).getImgId());

        holder.tv1.setText(datas.get(position).getName());

        holder.tv2.setText(datas.get(position).getDetail());

    }

    @Override

    public int getItemCount() {

        return datas==null?0:datas.size();

    }

    @Override

    public int getItemViewType(int position) {

        if(position%2==0){

            return ITEM_ONE;

        }else{

            return ITEM_TWO;

        }

    }

    class ViewHolder extends RecyclerView.ViewHolder{

        private TextView tv1,tv2;

        private ImageView img;

        public ViewHolder(View itemView) {

            super(itemView);

            tv1=itemView.findViewById(R.id.tv1);

            tv2=itemView.findViewById(R.id.tv2);

            img=itemView.findViewById(R.id.img);

        }

    }

}

4.Activity

　　

public class MainActivity extends AppCompatActivity {

    private RecyclerView recyclerView;

    private List<Person> datas;

    private MyAdapter adapter;

    private int[] imgs={R.drawable.p1,R.drawable.p2,R.drawable.p3,R.drawable.p4,R.drawable.p5,R.drawable.pic1,

            R.drawable.pic2,R.drawable.pic3,R.drawable.pic4,R.drawable.pic5,R.drawable.pic6};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        recyclerView= (RecyclerView) findViewById(R.id.recyclerview);

        initData();

        initRecyclerView();

    }

    private void initRecyclerView() {

        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        adapter=new MyAdapter(this,datas);

        recyclerView.setAdapter(adapter);

    }

    private void initData() {

        datas=new ArrayList<>();

        for(int i=0;i<imgs.length;i++){

            Person p=new Person();

            p.setName("hahfa"+i);

            p.setDetail("今天是星期一，还有5天才能休息"+i);

            p.setImgId(imgs[i]);

            datas.add(p);

        }

    }

}