你上几年级？你连基础都没掌握呢，先别看recyclerView了，先从Java看起吧，连基础的导包都弄懂。

MainActivity.java

package com.example.recyclerview2;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.DefaultItemAnimator;
import android.os.Bundle;
import android.widget.Toast;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    private RecyclerView recyclerView;
    private List<Bitmap> mDatas;
    private MyRecyclerAdapter recycleAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main); // 确保这是正确的布局文件名

        recyclerView = findViewById(R.id.recy_list);

        initData();
        recycleAdapter = new MyRecyclerAdapter(this, mDatas); // 使用 MainActivity.this 作为上下文

        // 使用 GridLayoutManager
        recyclerView.setLayoutManager(new GridLayoutManager(this, 4));
        recyclerView.setAdapter(recycleAdapter);
        recyclerView.setItemAnimator(new DefaultItemAnimator());

        recycleAdapter.setOnItemClickListener(new MyRecyclerAdapter.OnItemClickListener() {
            @Override
            public void onLongClick(int position) {
                Toast.makeText(MainActivity.this, "onLongClick事件您点击了第：" + position + "个Item", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onClick(int position) {
                Toast.makeText(MainActivity.this, "onClick事件您点击了第：" + position + "个Item", Toast.LENGTH_SHORT).show();
            }
        });
    }

    private void initData() {
        mDatas = new ArrayList<>();
        mDatas.add(BitmapFactory.decodeResource(getResources(), R.mipmap.a1));
        mDatas.add(BitmapFactory.decodeResource(getResources(), R.mipmap.a2));
        mDatas.add(BitmapFactory.decodeResource(getResources(),R.mipmap.a3));
        mDatas.add(BitmapFactory.decodeResource(getResources(),R.mipmap.a4));
        mDatas.add(BitmapFactory.decodeResource(getResources(),R.mipmap.a5));
        mDatas.add(BitmapFactory.decodeResource(getResources(),R.mipmap.a6));
        // 添加更多 Bitmap
    }
}

MyRecyclerAdapter.java

package com.example.recyclerview2;

import android.content.Context;
import android.graphics.Bitmap;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

import java.util.List;

public class MyRecyclerAdapter extends RecyclerView.Adapter<MyRecyclerAdapter.MyViewHolder> {
    private  OnItemClickListener mOnItemClickListener;
    private List<Bitmap> mDatas;
    private Context mContext;
    private LayoutInflater inflater;

    public MyRecyclerAdapter(Context context, List<Bitmap> datas){
        this. mContext=context;
        this. mDatas=datas;
        inflater=LayoutInflater. from(mContext);
    }

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

    //重写onCreateViewHolder方法，返回一个自定义的ViewHolder
    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = inflater.inflate(R.layout.item_home,parent, false);
        MyViewHolder holder= new MyViewHolder(view);
        return holder;
    }

    class MyViewHolder extends RecyclerView.ViewHolder{
        ImageView iv;

        public MyViewHolder(View view) {
            super(view);
            iv=(ImageView) view.findViewById(R.id.iv_item_adapter);
        }
    }

    public interface OnItemClickListener{
        void onClick( int position);
        void onLongClick( int position);
    }
    public void setOnItemClickListener(OnItemClickListener onItemClickListener ){
        this.mOnItemClickListener=onItemClickListener;
    }



    //填充onCreateViewHolder方法返回的holder中的控件
    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, final int position) {
        holder.iv.setImageBitmap(mDatas.get(position));

        if (mOnItemClickListener != null) {
            holder.itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mOnItemClickListener.onClick(holder.getBindingAdapterPosition());
                }
            });

            holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {
                    mOnItemClickListener.onLongClick(holder.getBindingAdapterPosition());
                    return false;
                }
            });
        }
    }
}

item_home.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"
    android:padding="16dp">

    <TextView
        android:id="@+id/titleTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="18sp"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/descriptionTextView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="4dp" />

    <ImageView
        android:id="@+id/iv_item_adapter"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="4dp" />

</LinearLayout>