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package se.andaz.funfacts;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.TextView;

import java.util.Random;

public class FunFactsActivity extends AppCompatActivity {

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

    // Declare our view variables
    private TextView mFactTextView;
    private Button mShowFactButton;
    private RelativeLayout mRelativeLayout;


    @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 variable.
        mFactTextView = (TextView) findViewById(R.id.factTextView);
        mShowFactButton = (Button) findViewById(R.id.funFactButton);
        mRelativeLayout = (RelativeLayout) findViewById(R.id.relativeLayout);

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

                String fact = mFactBook.getFact();
                int color = mColorWheel.getColor();

                // Update the screen with our dynamic fact.
                mFactTextView.setText(fact);
                mShowFactButton.setTextColor(color);
                mRelativeLayout.setBackgroundColor(color);

            }
        };
        mShowFactButton.setOnClickListener(listener);

    }
}

package se.andaz.funfacts;

import java.util.Random;

public class FactBook {
    // Fields (Member Variables) - Properties about the object
    private final 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 - Actions the object can take
    public String getFact()
    {
        String fact = "";
        // Randomly select a fact.
        Random randomGenerator = new Random();
        int randomNumber = randomGenerator.nextInt(mFacts.length);
        fact = mFacts[randomNumber];

        return fact;
    }

}

package se.andaz.funfacts;

import android.graphics.Color;

import java.util.Random;

public class ColorWheel {
    // Fields (Member Variables) - Properties about the object
    private final String[] mColors = {
            "#39add1", // light blue
            "#3079ab", // dark blue
            "#c25975", // mauve
            "#e15258", // red
            "#f9845b", // orange
            "#838cc7", // lavender
            "#7d669e", // purple
            "#53bbb4", // aqua
            "#51b46d", // green
            "#e0ab18", // mustard
            "#637a91", // dark gray
            "#f092b0", // pink
            "#b7c0c7"  // light gray
    };

    // Methods - Actions the object can take
    public int getColor()
    {
        String color = "";
        // Randomly select a fact.
        Random randomGenerator = new Random();
        int randomNumber = randomGenerator.nextInt(mColors.length);
        color = mColors[randomNumber];
        int colorAsInt = Color.parseColor(color);

        return colorAsInt;
    }
}