Question

I am making a quiz application with question and answer.
I want to make an clock count down ( Minute + Second ) and display it on screen.
But I can not how to do that.
Can anyone help me please ?

Answer 1

this is one solution to print time mm:ss format (Minutes:seconds)

   public class StartUp extends UiApplication{
        public static void main(String[] args) {
            StartUp start=new StartUp();
            start.enterEventDispatcher();
        }
        public StartUp() {
            pushScreen(new Timerscreen());
        }
    }

          class Timerscreen extends MainScreen
        {
            LabelField time;
            long mille=0;
            Timer timer=null;TimerTask task=null;
            public Timerscreen() {
                mille=1000*60*1;
                time=new LabelField();
                add(time);
                timer=new Timer();

                task=new TimerTask() {

                    public void run() {
                        synchronized (UiApplication.getEventLock()) {

                            if(mille!=0){
                                SimpleDateFormat date=new SimpleDateFormat("mm:ss") ;
                                System.out.println("================="+date.formatLocal(mille)+"====================="+Thread.activeCount());
                                time.setText(date.formatLocal(mille));
                                mille=mille-1000;
                            }else{
time.setText("00:00");
mille=1000*60*1;
                                timer.cancel();
                                UiApplication.getUiApplication().invokeLater(new Runnable() {
                                    public void run() {
                                        Dialog.inform("Time expaired");
                                    }
                                });

                            }
                        }
                    }
                };
                timer.schedule(task,0, 1000);
            }
        }