Android Studio – Finding ID of search view causes my app/ program to crash

I have developed a basic program where it has list(recycler view) and you can search from it. But, the issue i encountered is when i tried to integrate a search feature. When trying to find the id of the search view, my app crashes. I also tried to use EditText, but it encountered same problem. The line searchViewHx = findViewById(R.id.searchHx) is the one that error

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

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.SearchView;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {
    RecyclerView recyclerView;
    //RecyclerAdapter recyclerAdapter;
    ArrayList<String> soilList = new ArrayList<>();
    ArrayList<String> remarkList = new ArrayList<>();
    ImageView deleteAll;
    AlertDialog.Builder deleteAllBuilder;
    private SearchView searchViewHx;
    //EditText searchEdit;

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

        recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        deleteAll = findViewById(R.id.deleteAll);
        searchViewHx = findViewById(R.id.searchHx); //THE ONE THAT CAUSES ERROR
        //searchViewHx.clearFocus();
        /*searchViewHx.setOnQueryTextListener(new SearchView.OnQueryTextListener(){
            @Override
            public boolean onQueryTextSubmit(String query){
                return false;
            }
            @Override
            public boolean onQueryTextChange(String newText){
                filterList(newText);
                return true;
            }
        });*/

        soilList.add("Soil 1");
        soilList.add("Soil 2");
        soilList.add("Soil 3");
        soilList.add("Soil 4");
        soilList.add("Soil 5");

        remarkList.add("Passed");
        remarkList.add("Failed");
        remarkList.add("Passed");
        remarkList.add("Failed");
        remarkList.add("Failed");
        initRecyclerView();
        deleteAllBuilder = new AlertDialog.Builder(this); //CHANGE THIS
        deleteAll.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View view){
                deleteAllBuilder.setTitle("Alert")
                        .setMessage("Do you want to delete all?")
                        .setCancelable(true)
                        .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                //method that deletes all hx from list and cardview
                            }
                        })
                        .setNegativeButton("No", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {

                            }
                        })
                        .show();
            }
        });
    }

    /*private void filterList(String text) {
        List<String> filteredList = new ArrayList<>();
        filteredList.addAll(soilList);
        for(String item : filteredList){
            if(item.toLowerCase().contains(text.toLowerCase())){
                filteredList.add(item);
            }
            if(filteredList.isEmpty()){
                Toast.makeText(this, "No data found", Toast.LENGTH_SHORT).show();
            }else{
                recyclerAdapter.setFilteredList(filteredList);
            }
        }
    }*/

    private void initRecyclerView(){
        RecyclerAdapter recyclerAdapter = new RecyclerAdapter(soilList, remarkList);
        recyclerView.setAdapter(recyclerAdapter);
    }
    
}

XML FILE:

<?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.constraintlayout.widget.ConstraintLayout
        android:id="@+id/constraintLayout2"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        

        <ImageView
            android:id="@+id/deleteAll"
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:src="@drawable/delete_all"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <androidx.appcompat.widget.SearchView
            android:id="@+id/searchHx"
            android:layout_width="293dp"
            android:layout_height="match_parent"
            android:layout_marginStart="8dp"
            android:layout_marginTop="8dp"
            android:layout_marginBottom="8dp"
            android:background="@drawable/search_bg"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:queryHint="Search"
            app:iconifiedByDefault="false"/>
            <!--android:visibility="gone"/>-->

        <EditText
            android:id="@+id/searchEdit"
            android:layout_width="293dp"
            android:layout_height="match_parent"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            android:visibility="gone"/>

    </androidx.constraintlayout.widget.ConstraintLayout>

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/constraintLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="60dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/constraintLayout2"
        app:layout_constraintVertical_bias="0.0">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recyclerView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHorizontal_bias="0.0"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

I made sure, the search view is on the correct xml layout file and made sure Im using the right id of the search view. I imported the needed class and tried using edit text, to see if it has same problem.