CountDownTimerView.java

package codekata.observer;

public class CountDownTimerView implements CountDownObserver {
    @Override
    public void onStart() {
        //play count down start animation
    }

    @Override
    public void onCountDown(long elapsed, long remaining) {
        //update view
    }

    @Override
    public void onFinish() {
        //play count down end animation
    }
}