//消息通知栏         //定义NotificationManager         String ns = Context.NOTIFICATION_SERVICE;         NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);         //定义通知栏展现的内容信息         int icon = R.drawable.icon;         CharSequence tickerText = "我的通知栏标题";         long when = System.currentTimeMillis();         Notification notification = new Notification(icon, tickerText, when);         //定义下拉通知栏时要展现的内容信息         Context context = getApplicationContext();         CharSequence contentTitle = "我的通知栏标展开标题";         CharSequence contentText = "我的通知栏展开详细内容";         Intent notificationIntent = new Intent(this, BootStartDemo.class);         PendingIntent contentIntent = PendingIntent.getActivity(this, 0,                 notificationIntent, 0);         notification.setLatestEventInfo(context, contentTitle, contentText,                 contentIntent);         //用mNotificationManager的notify方法通知用户生成标题栏消息通知         mNotificationManager.notify(1, notification);