android:用RecyclerView显示列表不同布局

一，代码：

1,xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".activity.Recycle1Activity">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</androidx.constraintlayout.widget.ConstraintLayout>

两类item:无图:

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/textItem"
    android:layout_width="match_parent"
    android:layout_height="60dp"
    android:gravity="center_vertical"
    android:padding="16dp"
    android:textSize="18sp"/>

有图:

<?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="horizontal"
    android:padding="10dp">

    <ImageView
        android:id="@+id/userImage"
        android:background="#ffff00"
        android:layout_width="160dp"
        android:layout_height="160dp"
        android:src="@drawable/ic_launcher_foreground" />

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="vertical"
        android:paddingStart="16dp"
        android:paddingEnd="16dp"
        android:gravity="center_vertical">

        <TextView
            android:id="@+id/userId"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="商品名"
            android:textSize="18sp"
            android:textColor="@android:color/black" />

        <TextView
            android:id="@+id/userName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="描述"
            android:textSize="14sp"
            android:textColor="@android:color/darker_gray" />
    </LinearLayout>
</LinearLayout>

2,java

model:

package com.example.okdemo1.model;

public class UserListItemEntity {
    private int id;
    private String name;
    private String image;

    public UserListItemEntity(int id, String name, String image) {
        this.id = id;
        this.name = name;
        this.image = image;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    public String getImage() {
        return image;
    }

    public void setImage(String image) {
        this.image = image;
    }
}

activity:

package com.example.okdemo1.activity;

import android.os.Bundle;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import com.example.okdemo1.R;
import com.example.okdemo1.adapter.MyRecycleAdapter;
import com.example.okdemo1.model.UserListItemEntity;

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

public class Recycle1Activity extends AppCompatActivity {

    private RecyclerView recyclerView;
    private MyRecycleAdapter adapter;
    private List<UserListItemEntity> userList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_recycle1);

        recyclerView = findViewById(R.id.recyclerView);
        userList = new ArrayList<>();

        // 添加测试数据
        for (int i = 1; i <= 20; i++) {
            String image = "";
            if (i == 3) {
                image="https://wx1.sinaimg.cn/mw690/9f519e8bgy1i1n60ny8bmj22yo1o0hdv.jpg";
            } else if (i == 6) {
                image="https://wx3.sinaimg.cn/mw690/005SZ2Zygy1i1n5h61b79j30xc0l8grq.jpg";
            } else {
                image="";
            }
            UserListItemEntity one = new UserListItemEntity(i,"第 " + i + " 项",image);
            userList.add(one);
        }

        adapter = new MyRecycleAdapter(Recycle1Activity.this,userList);
        recyclerView.setLayoutManager(new LinearLayoutManager(this)); // 垂直列表
        recyclerView.setAdapter(adapter);

    }
}

adapter:

package com.example.okdemo1.adapter;

import androidx.recyclerview.widget.RecyclerView;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import androidx.recyclerview.widget.RecyclerView;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.DiskCacheStrategy;
import com.bumptech.glide.request.RequestOptions;
import com.example.okdemo1.R;
import com.example.okdemo1.model.UserListItemEntity;

import java.util.List;

public class MyRecycleAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    private Context context;
    private static final int TYPE_TEXT = 0;
    private static final int TYPE_IMAGE = 1;

    private List<UserListItemEntity> dataList;

    public MyRecycleAdapter(Context context,List<UserListItemEntity> dataList) {
        this.dataList = dataList;
        this.context = context;
    }

    @Override
    public int getItemViewType(int position) {
        UserListItemEntity one = dataList.get(position);
        int id = one.getId();
        System.out.println(id);
        if (id == 3 || id == 6){
            return TYPE_IMAGE;
        } else {
            return TYPE_TEXT;
        }
    }


    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if (viewType == TYPE_TEXT) {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_text, parent, false);
            return new TextViewHolder(view);
        } else {
            View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_text_image, parent, false);
            return new ImageViewHolder(view);
        }
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        if (holder instanceof TextViewHolder) {
            ((TextViewHolder) holder).bind(this.context,(UserListItemEntity) dataList.get(position));
        } else {
            ((ImageViewHolder) holder).bind(this.context,(UserListItemEntity) dataList.get(position));
        }
    }

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

// ViewHolder for text item
class TextViewHolder extends RecyclerView.ViewHolder {
    private TextView textView;

    public TextViewHolder(View itemView) {
        super(itemView);
        textView = itemView.findViewById(R.id.textItem);
    }

    public void bind(Context text,UserListItemEntity one) {
        textView.setText(one.getName());
    }
}

// ViewHolder for image item
class ImageViewHolder extends RecyclerView.ViewHolder {
    private ImageView imageView;

    private TextView nameView;
    public ImageViewHolder(View itemView) {
        super(itemView);
        imageView = itemView.findViewById(R.id.userImage);
        nameView = itemView.findViewById(R.id.userName);
    }

    public void bind(Context context,UserListItemEntity imageItem) {

        nameView.setText(imageItem.getName());
        //imageView.
        RequestOptions options = RequestOptions.fitCenterTransform();
        //设置图片
         Glide.with(context)
                .load(imageItem.getImage())
                .apply(options)
                .diskCacheStrategy(DiskCacheStrategy.ALL) // 缓存原始图片和转换后的图片到磁盘
                .skipMemoryCache(false) // 不跳过内存缓存
                .into(imageView);
    }
}

二，测试效果: