RecyclerView跟ListView类似，但是却比ListView更好用，算是ListView的升级版，谷歌官方也推荐使用RecylerView代替ListView。

关于ListView的用法可以查看上一篇博客
【Android】ListView的用法、自定义adapter（性能优化）

一、添加依赖

RecyclerView不属于support库的内容，需要添加依赖引入项目

build.gradle

dependencies {
    ...
    implementation 'androidx.recyclerview:recyclerview:1.1.0-rc01'
}

recyclerview版本一直会更新，上面是写博客时的最新版本。可以用Android Studio搜索到最新版本。关于添加依赖，可以查看博客
【Android】记不住gradle的写法？Android Studio搜索添加依赖（dependencies）

二、使用RecyclerView

1、准备资源

把图片复制到drawerable目录内备用，我这里只准备了一张图片重复用

2、简单布局

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	...
    <androidx.recyclerview.widget.RecyclerView     注意要写全包名
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
        
</LinearLayout>

新建一个recyclerView的item布局，就放一个图片和一个文本
contact_layout.xml

<?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="90dp">

    <ImageView
        android:id="@+id/iv"
        android:layout_width="70dp"
        android:layout_height="70dp"/>
    <TextView
        android:id="@+id/tv"
        android:layout_marginStart="20dp"
        android:layout_marginTop="15dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

3、新建一个类存储数据

Contact.java

public class Contact {
    private String name;
    private int imageId;
    public Contact(String name, int imageId){
        this.name = name;
        this.imageId = imageId;
    }

    public String getName(){
        return name;
    }

    public int getImageId(){
        return imageId;
    }
}

4、自定义Adapter

我们需要新建一个Adapter继承于RecyclerView .Adapter，同样地，ViewHolder 也要继承于RecyclerView的ViewHolder，ViewHolder能提高性能。其实代码很简单，就是写了2个构造方法并且实现了3个接口，构造方法用于接收数据，重写的3个方法用于处理数据

ContactAdapter.java

public class ContactAdapter extends RecyclerView .Adapter<ContactAdapter.ViewHolder>{
    private List<Contact> mContactList;

    static class ViewHolder extends RecyclerView.ViewHolder{
        View contactView;//存储解析到的view
        ImageView imageView;
        TextView textView;
        public ViewHolder(View view){
            super(view);
            contactView = view;
            imageView = view.findViewById(R.id.iv);
            textView = view.findViewById(R.id.tv);
        }
    }

    public ContactAdapter(List<Contact> contactList){
        mContactList = contactList;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.contact_layout,parent,false);//解析layout
        final ViewHolder viewHolder = new ViewHolder(view);//新建一个viewHolder绑定解析到的view
        //监听每一项的点击事件
        viewHolder.contactView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int position = viewHolder.getAdapterPosition();
                Contact contact = mContactList.get(position);
                Toast.makeText(view.getContext(),contact.getName(),Toast.LENGTH_SHORT).show();
            }
        });
        //监听每一项里的控件的点击事件，如点击了ImageView
        viewHolder.imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int position = viewHolder.getAdapterPosition();
                Contact contact = mContactList.get(position);
                Toast.makeText(view.getContext(),contact.getImageId(),Toast.LENGTH_SHORT).show();
            }
        });
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
        Contact contact = mContactList.get(position);
        holder.imageView.setImageResource(contact.getImageId());
        holder.textView.setText(contact.getName());
    }

    @Override
    public int getItemCount() {
        return mContactList.size();
    }


}

5、代码中使用RecyclrView

MainActivity.java

public class MainActivity extends AppCompatActivity {
    
    private List<Contact> contactList = new ArrayList<>();//存储实例化的数据
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        addContact();//往contactList添加数据
        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        LinearLayoutManager layoutManager = new LinearLayoutManager(MainActivity.this);//添加布局管理器
        //layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);设置为横向水平滚动，默认是垂直
        recyclerView.setLayoutManager(layoutManager);//设置布局管理器
        ContactAdapter adapter = new ContactAdapter(contactList);
        recyclerView.setAdapter(adapter);
    }

    private void addContact(){
        for (int i = 0;i<3;i++){
            Contact LiuMengLi = new Contact("柳梦璃",R.drawable.img);
            contactList.add(LiuMengLi);
            Contact HanLingSha = new Contact("韩菱纱",R.drawable.img);
            contactList.add(HanLingSha);
            Contact YunTianHe = new Contact("云天河",R.drawable.img);
            contactList.add(YunTianHe);
            Contact MuRongZiYing = new Contact("慕容紫英",R.drawable.img);
            contactList.add(MuRongZiYing);
        }

    }
}