public void onCreate(Bundle savedInstanceState) {
...
    mCountDown = (TickTockView) findViewById(R.id.view_ticktock_countdown);
    mCountUp = (TickTockView) findViewById(R.id.view_ticktock_countup);
    if (mCountDown != null) {
        mCountDown.setOnTickListener(new TickTockView.OnTickListener() {
            @Override
            public String getText(long timeRemaining) {
                int seconds = (int) (timeRemaining / 1000) % 60;
                int minutes = (int) ((timeRemaining / (1000 * 60)) % 60);
                int hours = (int) ((timeRemaining / (1000 * 60 * 60)) % 24);
                int days = (int) (timeRemaining / (1000 * 60 * 60 * 24));
                boolean hasDays = days > 0;
                return String.format("%1$02d%4$s %2$02d%5$s %3$02d%6$s",
                        hasDays ? days : hours,
                        hasDays ? hours : minutes,
                        hasDays ? minutes : seconds,
                        hasDays ? "d" : "h",
                        hasDays ? "h" : "m",
                        hasDays ? "m" : "s");
            }
        });
    }

    if (mCountUp != null) {
        mCountUp.setOnTickListener(new TickTockView.OnTickListener() {
            SimpleDateFormat format = new SimpleDateFormat("hh:mm:ss");
            Date date = new Date();
            @Override
            public String getText(long timeRemaining) {
                date.setTime(System.currentTimeMillis());
                return format.format(date);
            }
        });
    }
...
}

@Override
protected void onStart() {
    super.onStart();
    Calendar end = Calendar.getInstance();
    end.add(Calendar.MINUTE, 4);
    end.add(Calendar.SECOND, 5);

    Calendar start = Calendar.getInstance();
    start.add(Calendar.MINUTE, -1);
    if (mCountDown != null) {
        mCountDown.start(start, end);
    }

    Calendar c2= Calendar.getInstance();
    c2.add(Calendar.HOUR, 2);
    c2.set(Calendar.MINUTE, 0);
    c2.set(Calendar.SECOND, 0);
    c2.set(Calendar.MILLISECOND, 0);
    if (mCountUp != null) {
        mCountUp.start(c2);
    }
}

@Override
protected void onStop() {
    super.onStop();
    mCountDown.stop();
    mCountUp.stop();
}