Sử dụng RecycleView qua ví dụ cụ thể

package vn.edu.tinhoc123.recycleviewexample;

public class Country {
    private String countryName;
    private String countryFlag;
    private int population;
    // Constructor
    // getters, setters

}

package vn.edu.tinhoc123.recycleviewexample;

import android.annotation.SuppressLint;
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 CountryRVAdapter extends RecyclerView.Adapter {
    List<Country> lstDataSource;
    public CountryRVAdapter(List<Country> lstDataSource) {
        this.lstDataSource = lstDataSource;
    }
    // Item view hoder class
   public final class CountryItemViewHoder extends RecyclerView.ViewHolder implements View.OnClickListener {
        ImageView flagView;
        TextView countryNameView;
        TextView populationView;
        public int position;
        public CountryItemViewHoder(View itemView) {
            super(itemView);
            itemView.setOnClickListener(this);
            flagView =(ImageView)   itemView.findViewById(R.id.imageViewFlag);
            countryNameView =(TextView)  itemView.findViewById(R.id.textViewCountryName);
            populationView = (TextView) itemView.findViewById(R.id.textViewPopulation);
        }
        @Override
        public void onClick(View view) {
            // Get the clicked item position
            int clickedPosition = getAdapterPosition();
            // Get the corresponding Ctrounty object
            Country country = lstDataSource.get(clickedPosition);
            // Perform the desired action for the clicked item
            Toast.makeText(view.getContext(), "Clicked: " + country.getCountryName(), Toast.LENGTH_SHORT).show();
        }
    }

    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.country_item_layout, parent, false);
        CountryItemViewHoder vh = new CountryItemViewHoder(v);
        return vh;
    }
    @Override
    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, @SuppressLint("RecyclerView") int position) {
        CountryItemViewHoder viewHolder = (CountryItemViewHoder) holder;
        viewHolder.position = position;
        Country country = lstDataSource.get(position);
        ((CountryItemViewHoder) holder).countryNameView.setText(country.getCountryName());
        ((CountryItemViewHoder) holder).flagView.setImageResource( getMipmapResId(holder.itemView, country.getCountryFlag()));
        ((CountryItemViewHoder) holder).populationView.setText(String.valueOf(country.getPopulation()) );
    }
    private int getMipmapResId(View itemView, String mipmapName) {
        String packageName = itemView.getContext().getPackageName();
        return itemView.getResources().getIdentifier(mipmapName, "mipmap", packageName);
    }
    @Override
    public int getItemCount() {
        return lstDataSource.size();
    }
}

<?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:layout_width="match_parent"
    android:layout_height="100dp" >

    <ImageView
        android:id="@+id/imageViewFlag"
        android:layout_width="90dp"
        android:layout_height="90dp"
        android:layout_marginStart="5dp"
        android:layout_marginTop="5dp"
        android:layout_marginBottom="5dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:srcCompat="@tools:sample/avatars" />

    <TextView
        android:id="@+id/textViewCountryName"
        android:layout_width="0dp"
        android:layout_height="50dp"
        android:layout_marginStart="5dp"
        android:layout_marginTop="5dp"
        android:layout_marginEnd="5dp"
        android:text="Ten Quoc Gia o day"
        android:textStyle="bold"
        android:textSize="18dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toEndOf="@+id/imageViewFlag"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/textViewPopulation"
        android:layout_width="0dp"
        android:layout_height="38dp"
        android:layout_marginStart="5dp"
        android:layout_marginTop="2dp"
        android:layout_marginEnd="5dp"
        android:text="Population: 1000000"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/imageViewFlag"
        app:layout_constraintTop_toBottomOf="@+id/textViewCountryName" />
</androidx.constraintlayout.widget.ConstraintLayout>