Android中使用TimerHandler设置每秒刷新操作

效果：

在界面中每秒刷新时间

关键代码如下：

public static TimerHandler timerHandler;    //定义一个TimerHandler全局变量

在onCreate函数中

timerHandler = new TimerHandler();  //实例化TimerHandler
        Timer timer = new Timer();     //设置定时器Timer
        timer.schedule(new MyTimerTask(), 0, 1000 );  //0表示无延迟，1000表示隔1000ms

 

private class MyTimerTask extends TimerTask
    {
        public void run()
        {
            MainActivity.timerHandler.sendEmptyMessage(0);
        }
    }

 

public class TimerHandler extends Handler
    {
        @Override
        public void handleMessage(Message msg)
        {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
            Date date=new Date();
            Date date2 = date;
            try {
                date2 = sdf.parse(START_DATE);<span style="white-space:pre">  </span>//START_DATE是自己定义的一个代表日期的字符串全局变量
            } catch (ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            int secondNum=(int)(((date.getTime()-date2.getTime())/(1000))%60);
            int minNum = (int)(((date.getTime()-date2.getTime())/(60*1000))%60);
            int hourNum = (int)(((date.getTime()-date2.getTime())/(60*60*1000))%24);
            int dayNum=(int)((date.getTime()-date2.getTime())/(24*60*60*1000));
            MainActivity.day.setText(""+dayNum);
            MainActivity.hour.setText(""+hourNum);
            MainActivity.min.setText(""+minNum);
            MainActivity.second.setText(""+secondNum);
        }
    }