Help Errors in fun fact code. Not sure why please help

package com.example.peter.funfacts;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

public class FunFactsActivity extends Activity {

    public static final String TAG = FunFactsActivity.class.getSimpleName();

    private FactBook mFactBook = new FactBook();
    private ColorWheel mColorWheel = new ColorWheel();

    public FunFactsActivity() {
        super();
    }

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

        //Declare View Variables and Assign them the Views from the layout file
        final TextView factLabel = (TextView) findViewById(R.id.factTextView);
        final Button showFactButton = (Button) findViewById(R.id.showFactButton);
        final RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.relativeLayout);

        View.OnClickListener listener = new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                //Update factLabel with dynamic fact
                factLabel.setText(mFactBook.getFact());

                int color = mColorWheel.getColor();
                relativeLayout.setBackgroundColor(color);
                showFactButton.setTextColor(color);
            }
        };

        showFactButton.setOnClickListener(listener);

        //Display a message to user when activity is created that disappears
        Toast.makeText(this, "Yay! Our activity was created.", Toast.LENGTH_LONG).show();

        //Display a message to log when activity is created
        Log.d(TAG,"We're logging from the onCreate() method");
    }
}

package com.example.peter.funfacts;

import java.util.Random;

public class FactBook {
    //Member Variables
    public String[] mFacts = {"Ants stretch when they wake up in the morning.",
            "Ostriches can run faster than horses.",
            "Olympic gold medals are actually made mostly of silver.",
            "You are born with 300 bones; by the time you are an adult you will have 206.",
            "It takes about 8 minutes for light from the Sun to reach Earth.",
            "Some bamboo plants can grow almost a meter in just one day.",
            "The state of Florida is bigger than England.",
            "Some penguins can leap 2-3 meters out of the water.",
            "On average, it takes 66 days to form a new habit.",
            "Mammoths still walked the earth when the Great Pyramid was being built."};

    //Methods
    public String getFact(){
        //Update fact label with new fact
        String fact = "";

        //Randomly select a fact
        Random randomGenerator = new Random();
        int randomNumber = randomGenerator.nextInt(mFacts.length);

        //Convert random number to text fact
        fact = mFacts[randomNumber];

        return fact;
    }
}

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;