定时器的使用

方式一   , handler.postDelayed  定时

        timerCount = Integer.parseInt(timer_tv.getText().toString());   //    页面上10秒 倒数
        handler = new Handler();
        // 开启 定时器
        handler.postDelayed(runnable, 1000);    // 1秒发送一次
----------------------------------------------------
    Runnable runnable = new Runnable() {
        private boolean isStop = false;    // 停止标志位

        @Override
        public void run() {
           //------------业务处理
            Toast.makeText(JpushNotifyordersActivity.this, "定时器运行中", 300)
                    .show();
            timerCount--;
            if (timerCount == 0) {
                timerCount = 10;
                isStop = true;                              // 停止发送
                // handler.removeCallbacks(runnable);            //停止的方法// 请求网络
                finish();
            }
            timer_tv.setText("" + timerCount);
            if (!isStop) {    // 
                handler.postDelayed(this, 1000);    //重复发送
            }
        }
    };

方式二 :

Timer  和  TimerTask 定时

   handler = new Handler() {  
            public void handleMessage(Message msg) {  
                adViewPager.setCurrentItem(msg.what);  
                super.handleMessage(msg);  
  
            }  
     };  

   bannerTimer = new Timer();  

//*********以上是初始化****************
  
  
    //启动banner自动轮播  
    public void bannerStartPlay(){  
        if (bannerTimer != null) {  
            if (bannerTimerTask != null)  
                bannerTimerTask.cancel();  
             //加上
             bannerTimerTask = new BannerTimerTask();  
            bannerTimer.schedule(bannerTimerTask, 5000, 5000);//5秒后执行，每隔5秒执行一次  
        }  
    }  
    //暂停banner自动轮播  
    public void bannerStopPlay(){  
        if (bannerTimerTask != null)  
            bannerTimerTask.cancel();  
    }  

    class BannerTimerTask extends TimerTask {  
        @Override  
        public void run() {  
            // TODO Auto-generated method stub  
            System.out.println("banner playing");  
            Message msg = new Message();  
            if (bannerViewList.size() <= 1)  
                return;  
            int currentIndex = adViewPager.getCurrentItem();  
            if (currentIndex == bannerViewList.size() - 1)  
                msg.what = 0;  
            else  
                msg.what = currentIndex + 1;  
  
            handler.sendMessage(msg);  
        }  
  
    }