public int onStartCommand(final Intent intent, int flags, int startId) {

            long period = 24*60*60*1000; //一天一个周期

        int delay=intent.getIntExtra("delayTime",0);

        if (null == timer ) {

            timer = new Timer();

        }

        timer.schedule(new TimerTask() {

            @Override

            public void run() {

                // TODO Auto-generated method stub

                NotificationManager mn= (NotificationManager) PushService.this.getSystemService(NOTIFICATION_SERVICE);

                Notification.Builder builder = new Notification.Builder(PushService.this);

                Intent notificationIntent = new Intent(PushService.this,MainActivity.class);//点击跳转位置

                PendingIntent contentIntent = PendingIntent.getActivity(PushService.this,0,notificationIntent,0);

                builder.setContentIntent(contentIntent);

                builder.setSmallIcon(R.mipmap.ic_launcher);

                builder.setTicker(intent.getStringExtra("tickerText")); //测试通知栏标题

                builder.setContentText(intent.getStringExtra("contentText")); //下拉通知啦内容

                builder.setContentTitle(intent.getStringExtra("contentTitle"));//下拉通知栏标题

                builder.setAutoCancel(true);

                builder.setDefaults(Notification.DEFAULT_ALL);

                Notification notification = builder.build();

                mn.notify((int)System.currentTimeMillis(),notification);

            }

        },delay, period);

        return super.onStartCommand(intent, flags, startId);

    }