Can anyone fix this crash?

package everingeducational.oceanical;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.Random;

public class MainActivity extends AppCompatActivity {

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

        final ImageView factPhoto;
        final TextView theFact;
        Button anotherFact;

        factPhoto = (ImageView) findViewById(R.id.factPhoto);
        theFact = (TextView) findViewById(R.id.theFact);
        anotherFact = (Button) findViewById(R.id.anotherFact);

        View.OnClickListener listener = new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String[] factBook = {
                        "Scientists say that octopuses are technically aliens.",
                        "Of the more than 500 or so shark species, about 80% grow to less than 1.6 meters.",
                        "Almost any shark 1.8 meters or longer is a potential danger, but three species have been identified repeatedly in fatal bites: great whites, tigers, and bull sharks.",
                        "An estimated 50-80% of all life on earth is found under the ocean surface."
                };


                Random randomGenerator = new Random();
                int randomNumber = randomGenerator.nextInt(factBook.length);


                if (randomNumber == 0) {
                    factPhoto.setImageResource(R.drawable.octopus_alien_discovery);
                }

                else if (randomNumber == 1) {
                    factPhoto.setImageResource(R.drawable.shark_species_laura);
                }

                else if (randomNumber == 2) {
                    factPhoto.setImageResource(R.drawable.shark_long_evolution);
                }

                else {
                    factPhoto.setImageResource(R.drawable.coral_life_constant);
                }








                String fact = factBook[factBook.length];
                theFact.setText(fact);
            }
        };
        anotherFact.setOnClickListener(listener);
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}