Method onItemClick for ListView doesn't work with activity which implements LoaderCallbacks

Question

I cannot find a solution. I have no errors, yet after clicking on the list item the onItemClick method does not work. I put the onItemClick method in various places in the code. I thought maybe the problem is that there is a GridLayout in the ListView and I click GridLayout and not ListView?

Activity class:

import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.ActionBar;
import androidx.appcompat.app.AppCompatActivity;
import androidx.loader.app.LoaderManager;
import androidx.loader.content.CursorLoader;
import androidx.loader.content.Loader;
import butterknife.BindView;
import butterknife.ButterKnife;

import android.provider.MediaStore;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;

import com.niemiec.reliablealarmclock.R;
import com.niemiec.reliablealarmclock.view.activity.addAlarm.sound.file.adapter.MusicListAdapter;


public class MySoundsActivity extends AppCompatActivity implements LoaderManager.LoaderCallbacks<Cursor>, MySoundsContractMVP.View {

    private MusicListAdapter adapter;

    private ActionBar actionBar;
    private MySoundPresenter presenter;

    @BindView(R.id.sounds_list_view)
    ListView filesListView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my_sounds);
        ButterKnife.bind(this);
        actionBar = getSupportActionBar();
        addBackArrow();
        createMySoundsPresenter();

        showMusicList();
    }

    private void showMusicList() {
        getSupportLoaderManager().initLoader(1, null, this);

        filesListView.setOnItemClickListener((AdapterView<?> adapterView, View view, int position, long id) -> {
            Toast.makeText(MySoundsActivity.this, "TEKST!", Toast.LENGTH_SHORT).show();
            System.out.println("TEKST!");
        });
    }

    private void createMySoundsPresenter() {
        presenter = new MySoundPresenter();
        presenter.attach(this);
    }

    private void addBackArrow() {
        actionBar.setDisplayHomeAsUpEnabled(true);
    }

    @NonNull
    @Override
    public Loader<Cursor> onCreateLoader(int id, @Nullable Bundle args) {
        Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
        CursorLoader cl =  new CursorLoader(this, uri, null, null, null, null);
        cl.setSortOrder(MediaStore.MediaColumns.TITLE + " ASC" );
        return cl;
    }

    @Override
    public void onLoadFinished(@NonNull Loader<Cursor> loader, Cursor cursor) {
        cursor.moveToFirst();
        adapter = new MusicListAdapter(this, cursor);
        filesListView.setAdapter(adapter);
    }

    @Override
    public void onLoaderReset(@NonNull Loader<Cursor> loader) {

    }
}

MusicListAdapter class:

import android.content.Context;
import android.database.Cursor;
import android.provider.MediaStore;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.TextView;

import com.niemiec.reliablealarmclock.R;

import static android.content.Context.LAYOUT_INFLATER_SERVICE;

public class MusicListAdapter extends BaseAdapter {
    private Cursor cursor;
    private Context context;
    private LayoutInflater inflater;

    public MusicListAdapter(Context context, Cursor cursor) {
        this.context = context;
        this.cursor = cursor;
        inflater = (LayoutInflater) context.getSystemService(LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {
        return cursor.getCount();
    }

    @Override
    public Object getItem(int i) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = convertView;
        ViewHolder viewHolder = null;

        cursor.moveToPosition(position);

        if (view == null) {
            view = inflater.inflate(R.layout.music_list_row, parent, false);
            viewHolder = new ViewHolder();

            viewHolder.title = view.findViewById(R.id.title_text_view);
            viewHolder.author = view.findViewById(R.id.author_text_view);
            viewHolder.playButton = view.findViewById(R.id.play_image_button);

            view.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) view.getTag();
        }

        viewHolder.author.setText(getAuthor());
        viewHolder.title.setText(cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.TITLE)));
        viewHolder.playButton.setImageResource(R.drawable.ic_baseline_play_circle_outline_24);

        return view;
    }

    private String getAuthor() {
        String author = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.AudioColumns.ARTIST));
        if (author.equalsIgnoreCase("<unknown>")) {
            author = context.getResources().getString(R.string.author_unkown);
        }
        return author;
    }

    class ViewHolder {
        TextView title;
        TextView author;
        ImageButton playButton;
    }
}