No toast showing when I run the app

package com.jackco.funfacts;

import androidx.appcompat.app.AppCompatActivity;

import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

public class FunFactsActivity extends AppCompatActivity {
    private FactBook factBook =  new FactBook();
    private ColorWheel colorWheel = new ColorWheel();
    //Declare our view variables
    private TextView factTextView;
    private Button showFactButton;
    private RelativeLayout relativeLayout;

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

        // Assign the views from the layout file to the corresponding variables
        factTextView = findViewById(R.id.factTextView);
        showFactButton = findViewById(R.id.showFactButton);
        relativeLayout = findViewById(R.id.relativeLayout);


        View.OnClickListener listener = new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //Get fact from FactBook class
                String fact = factBook.getFact();
                int color = colorWheel.getColor();
                //Update the screen with our new fact
                factTextView.setText(fact);
                relativeLayout.setBackgroundColor(color);
                showFactButton.setTextColor(color);
            }
        };

        showFactButton.setOnClickListener(listener);

        Toast.makeText(this, "Yay! Our activity was created!", Toast.LENGTH_SHORT).show();
    }
}