The random numbers won't appear when I click the button

package com.dwayne.funfacts;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.util.Random;

public class FunFactsActivity extends Activity {

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

        // Declare our View variables and assign them the views from the layout file
        final TextView factLabel = (TextView) findViewById(R.id.txtFactView);
        Button showFactButton = (Button) findViewById(R.id.showFactButton);
        View.OnClickListener Listener = new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // The button was clicked, so update the fact label with a new fact
                String fact = "";
                // Randomly select a fact
                Random randomGenerator = new Random(); //Construct a new Random number generator
                int randomNumber = randomGenerator.nextInt(3);
                fact = randomNumber + "";
                factLabel.setText(fact);
            }
        };
    showFactButton.setOnClickListener(Listener);
    }
}