androidx.recyclerview:recyclerview的使用

article/2025/11/10 5:14:12

添加扩展

或手动修改app/build.gradle：
在dependencies里添加

implementation 'androidx.recyclerview:recyclerview:1.0.0'

新建布局layout

item布局fruit_item.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="wrap_content"><ImageViewandroid:id="@+id/fruit_image"android:layout_width="wrap_content"android:layout_height="wrap_content" /><TextViewandroid:id="@+id/fruit_name"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center_vertical"android:layout_marginLeft="10dp"/>
</LinearLayout>

修改活动布局activity_main.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="match_parent"><androidx.recyclerview.widget.RecyclerViewandroid:id="@+id/recycler_view"android:layout_width="match_parent"android:layout_height="match_parent"/></LinearLayout>

item数据类

package com.example.recyclerviewtest;public class Fruit {private String name;private int imageId;public Fruit(String name, int imageId) {this.name = name;this.imageId = imageId;}public String getName() {return name;}public int getImageId() {return imageId;}
}

适配器类FruitAdapter

package com.example.recyclerviewtest;import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;import java.util.List;public class FruitAdapter extends RecyclerView.Adapter<FruitAdapter.ViewHolder> {private List<Fruit> mFruitList;static class ViewHolder extends RecyclerView.ViewHolder {View fruitView;ImageView fruitImage;TextView fruitName;public ViewHolder(View view) {super(view);fruitView = view;fruitImage = view.findViewById(R.id.fruit_image);fruitName = view.findViewById(R.id.fruit_name);}}@NonNull@Overridepublic ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.fruit_item, parent, false);final ViewHolder holder = new ViewHolder(view);holder.fruitView.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {int position = holder.getAdapterPosition();Fruit fruit = mFruitList.get(position);Toast.makeText(view.getContext(), "你点击了View"+ fruit.getName(), Toast.LENGTH_SHORT).show();}});holder.fruitImage.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {int position = holder.getAdapterPosition();Fruit fruit = mFruitList.get(position);Toast.makeText(view.getContext(), "你点击了图片"+ fruit.getName(), Toast.LENGTH_SHORT).show();}});return holder;}@Overridepublic void onBindViewHolder(@NonNull ViewHolder holder, int position) {Fruit fruit = mFruitList.get(position);holder.fruitImage.setImageResource(fruit.getImageId());holder.fruitName.setText(fruit.getName());}@Overridepublic int getItemCount() {return mFruitList.size();}public FruitAdapter(List<Fruit> fruitList) {mFruitList = fruitList;}}

主活动类

package com.example.recyclerviewtest;import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;import android.os.Bundle;import java.util.ArrayList;
import java.util.List;public class MainActivity extends AppCompatActivity {private List<Fruit> fruitList = new ArrayList<>();@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initFruits();RecyclerView recyclerView = findViewById(R.id.recycler_view);LinearLayoutManager layoutManager= new LinearLayoutManager(this);recyclerView.setLayoutManager(layoutManager);FruitAdapter adapter = new FruitAdapter(fruitList);recyclerView.setAdapter(adapter);}private void initFruits() {for(int i = 0; i < 10; i++) {Fruit apple = new Fruit("Apple", R.drawable.apple_pic);fruitList.add(apple);Fruit banana = new Fruit("banana", R.drawable.banana_pic);fruitList.add(banana);}}
}