String title = "通知标题";//标题
String content = "通知内容";//内容
//1.得到NotificationManager
NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
//2.实例化一个通知,指定图标、概要、时间
Notification n = new Notification(R.drawable.icon, "提醒通知!", System.currentTimeMillis());
//3.指定通知的标题、内容和intent 由于是在当前Activity内部点击
Intent intent = new Intent(this,MainActivity.class);
PendingIntent pi = PendingIntent.getActivity(this, 0, intent, 0);
n.setLatestEventInfo(this, title, content, pi);
//指定声音
n.defaults = Notification.DEFAULT_SOUND;
//4.发送通知
nm.notify(1, n);