Add the loop play.

Add the loop play.
Using Timer and TimerTask can automatically play.
I'm sorry for my bad english, might describe the wrong, I posted the code it directly：
LightTimer timer = new LightTimer() {
    @Override
    public void run(LightTimer timer) {
            // TODO Auto-generated method stub
            viewFlow.showNext();
        }
    };
timer.startTimer(1000);//Loop play，Once per second