Dynamically Changing the Background Color

// Dynamically Changing the Background Color

FunFactsActivity.java

private FactBook mFactBook = new FactBook();

public class FunFactsActivity extends Activity {
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fun_facts);

        final TextView factLabel = (TextView) findViewById(R.id.factTextView);
        Button showFactButton = (Button) findViewById(R.id.showFactButton);

    RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.idOfRelativeLayout);

        View.OnClickListener listenerName = new View.onClickListener(){

                @Override
                public void onClick(View view) {

                String fact = mFactBook.getFact();

                factLabel.setText(fact);
        //change background color onClick:
        relativeLayout.setBackgroundColor(Color.RED);
                               }
        };

        showFactButton.setOnClickListener(listenerName);
    }
}

//-----------------------------------------------------------------------------------------------------------------------------------------

FactBook.java

public class FactBook {

        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." };

        public String getFact() {

                String fact = "";

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

                fact = mFacts[randomNumber];

                return fact; //return = I am done with this method, here is the result.
        }
}


// https://teamtreehouse.com/library/build-a-simple-android-app-new/improving-our-code/dynamically-changing-the-background-color