android: recyclerview+GirdLayoutManager处理点击事件

一，代码:

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;

    //点击事件的listener
    private ItemClickListener mClickListener;
    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();
    }

    // allows clicks events to be caught
    public void setClickListener(ItemClickListener itemClickListener) {
        this.mClickListener = itemClickListener;
    }
    
    //点击事件的接口
    // parent activity will implement this method to respond to click events
    public interface ItemClickListener {
        void onItemClick(View view, int position);
    }


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

    public TextViewHolder(View itemView) {
        super(itemView);
        textView = itemView.findViewById(R.id.textItem);
        //处理点击事件
        itemView.setOnClickListener(this);
    }

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

    //处理点击事件
    @Override
    public void onClick(View view) {
        if (mClickListener != null) {
            mClickListener.onItemClick(view, getAdapterPosition());
        }
    }
}

// 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);
    }
}

}   //整个class结束

activity：

package com.example.okdemo1.activity;

import android.os.Bundle;
import android.util.Log;
import android.view.View;

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.GridLayoutManager;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.StaggeredGridLayoutManager;

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

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

public class Recycle1Activity extends AppCompatActivity implements MyRecycleAdapter.ItemClickListener  {

    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

        adapter.setClickListener(this);   //指向当前类中的事件处理接口的实现
        recyclerView.setLayoutManager(new GridLayoutManager(this,
                2,   //两列
                GridLayoutManager.VERTICAL,  //垂直方向
                false
                ));// 垂直网格
       /*
        recyclerView.setLayoutManager(new StaggeredGridLayoutManager(
                3, //3列
                StaggeredGridLayoutManager.VERTICAL   //垂直方向
        )); // 垂直瀑布流
        */
        recyclerView.setAdapter(adapter);
        //recyclerView.addItemDecoration();
        recyclerView.addItemDecoration(new SpaceItemDecoration(10,2));
        recyclerView.setPadding(0,0,0,0);
    }

    @Override
    public void onItemClick(View view, int position) {
        UserListItemEntity one = userList.get(position);
        int id = one.getId();
        String name = one.getName();
        Log.i("TAG", "你点击的数据为: id:"+id+",name:"+ name + ", 位置索引: " + position);
    }
}

二，测试效果: