实现Android的消息通知栏

　要使用消息通知，必需要用到两个类：NotificationManager和Notification，其余NotificationManager的初始化是用getSystemService方法，而且经过notify方法来向android系统发送消息栏通知和显示。

效果：

代码：

　//消息通知栏

//定义NotificationManager

String ns = Context.NOTIFICATION_SERVICE;

NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);

 //定义通知栏展示的内容信息

int icon = R.drawable.icon;

CharSequence tickerText = "个人通知栏标题";

long when = System.currentTimeMillis();

Notification notification = new Notification(icon, tickerText, when);

//定义下拉通知栏时要展示的内容信息

 Context context = getApplicationContext();

CharSequence contentTitle = "个人通知栏标展开标题";

CharSequence contentText = "个人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);