Dynamically changing background color Android Java

import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class MainActivity extends Activity {

        //Move your declarations here if you intend on using them after the onCreate() method
    private TextView foodLabel;
    private TextView drinkLabel;
    private RelativeLayout mealLayout;

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

                //Inflate your objects
        foodLabel = (TextView) findViewById(R.id.food);
        drinkLabel = (TextView) findViewById(R.id.drink);
        mealLayout = (RelativeLayout) findViewById(R.id.layout);

                //We change the color to RED for the first time as the program loads
                mealLayout.setBackgroundColor(Color.RED);


        //Create the timer object which will run the desired operation on a schedule or at a given time
        Timer timer = new Timer();

                //Create a task which the timer will execute.  This should be an implementation of the TimerTask interface.  
                //I have created an inner class below which fits the bill.
        MyTimer mt = new MyTimer();

                //We schedule the timer task to run after 1000 ms and continue to run every 1000 ms.  
        timer.schedule(mt, 1000, 1000);
    }

        //An inner class which is an implementation of the TImerTask interface to be used by the Timer.
    class MyTimer extends TimerTask {

        public void run() {                       

                        //This runs in a background thread.  
                        //We cannot call the UI from this thread, so we must call the main UI thread and pass a runnable
            runOnUiThread(new Runnable() {

                public void run() {
                    Random rand = new Random();
                                        //The random generator creates values between [0,256) for use as RGB values used below to create a random color
                                        //We call the RelativeLayout object and we change the color.  The first parameter in argb() is the alpha.
                    mealLayout.setBackgroundColor(Color.argb(255, rand.nextInt(256), rand.nextInt(256), rand.nextInt(256) ));
                }
            });
        }

    }