Do we need a FrameLayout as the root layout of data item?

activity_main.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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

data_item_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tv"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="TextView"
    android:textColor="#FF00FF00"
    android:textSize="30sp"
    android:textStyle="bold" />

DataAdapter.java

package com.example.testrv;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

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

public class DataAdapter extends RecyclerView.Adapter<DataAdapter.DataHolder> {

    private String data[];

    public DataAdapter(String[] data) {
        this.data = data;
    }

    @NonNull
    @Override
    public DataHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.data_item_layout, parent, false);
        return new DataHolder(v);
    }

    @Override
    public void onBindViewHolder(@NonNull DataHolder holder, int position) {
        holder.tv.setText(data[position]);
    }

    @Override
    public int getItemCount() {
        return data.length;
    }

    static class DataHolder extends RecyclerView.ViewHolder {

        private final TextView tv;

        public TextView getTv() {
            return tv;
        }


        public DataHolder(@NonNull View itemView) {
            super(itemView);

            tv = itemView.findViewById(R.id.tv);

            // set click listener here
            itemView.setOnClickListener(v -> {
                tv.setText("item at " + getAdapterPosition() + " is clicked!");
            });

        }
    }

}

MainActivity.java

package com.example.testrv;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        String data[] = {"A", "B"};

        DataAdapter da = new DataAdapter(data);


        RecyclerView rv = findViewById(R.id.rv);
        rv.setLayoutManager(new LinearLayoutManager(this));
        rv.setAdapter(da);

    }
}