getloadermanager.initLoader isnot accepting "this" parameter

I've tried to use Loader to fetch the data from the database. I've tried getsupportloaderManager and all the other stuff still it's showing error. In getloaderManager().initLoader(PET_LOADER, null, this); Last parameter i.e this isnot getting accepted.

The code is:

package com.example.pets;

import android.content.ContentValues;
 import android.content.Intent;
import android.database.Cursor;
  import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
 import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;

import com.example.pets.Data.PetContract;
import com.google.android.material.floatingactionbutton.FloatingActionButton;

  public class MainActivity extends AppCompatActivity implements 
  LoaderManager.LoaderCallbacks<Cursor>  {

public static final int PET_LOADER = 10;
PetCursorAdapter petCursorAdapter;

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



    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(view -> {
        Intent intent = new Intent(MainActivity.this, EditorActivity.class);
        startActivity(intent);
    });

    ListView listView = (ListView) findViewById(R.id.listview);
    View empty_view = findViewById(R.id.empty_view);
    listView.setEmptyView(empty_view);
    PetCursorAdapter petCursorAdapter = new PetCursorAdapter(this, null);
    listView.setAdapter(petCursorAdapter);


    **getLoaderManager().initLoader(PET_LOADER, null, this);**

}



private void insertPet() {
    // Create a ContentValues object where column names are the keys,
    // and Toto's pet attributes are the values.
    ContentValues values = new ContentValues();
    values.put(PetContract.PetEntry.PET_NAME, "Toto");
    values.put(PetContract.PetEntry.BREED, "Terrier");
    values.put(PetContract.PetEntry.GENDER, PetContract.PetEntry.GENDER_MALE);
    values.put(PetContract.PetEntry.WEIGHT, 7);

    // Insert a new row for Toto into the provider using the ContentResolver.
    // Use the {@link PetEntry#CONTENT_URI} to indicate that we want to insert
    // into the pets database table.
    // Receive the new content URI that will allow us to access Toto's data in the future.
    Uri newUri = getContentResolver().insert(PetContract.CONTENT_URI, values);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu options from the res/menu/menu_catalog.xml file.
    // This adds menu items to the app bar.
    getMenuInflater().inflate(R.menu.menu, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // User clicked on a menu option in the app bar overflow menu
    switch (item.getItemId()) {
        // Respond to a click on the "Insert dummy data" menu option
        case R.id.action_insert_dummy_data:
            insertPet();
            return true;

        // Respond to a click on the "Delete all entries" menu option
        case R.id.action_delete_all_entries:
            // Do nothing for now
            return true;
    }
    return super.onOptionsItemSelected(item);
}

@NonNull
@Override
public Loader<Cursor> onCreateLoader(int id, @Nullable Bundle args) {
    String[] projection = {PetContract.PetEntry._ID, PetContract.PetEntry.PET_NAME, PetContract.PetEntry.BREED};
    return  new CursorLoader(this, PetContract.CONTENT_URI, projection, null, null, null);


}


@Override
public void onLoadFinished(@NonNull Loader<Cursor> loader, Cursor data) {
    petCursorAdapter.swapCursor(data);
}

@Override
public void onLoaderReset(@NonNull Loader<Cursor> loader) {
    petCursorAdapter.swapCursor(null);
}

}

and the problem i'm getting is:

'initLoader(int, android.os.Bundle, android.app.LoaderManager.LoaderCallbacks<D>)' in 'android.app.LoaderManager' cannot be applied to '(int, null, com.example.pets.MainActivity)'

How to solve this error?