final NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

PendingIntent pendingIntent = PendingIntent.getActivity(BaiDuMapActivity.this, 0, new Intent().setAction(Intent.ACTION_VIEW), 0);

Notification notify= new Notification.Builder(BaiDuMapActivity.this)

                        .setTicker( "您有新短消息，请注意查收！")

                        .setContentTitle("Notification Title")

                        .setContentText("This is the notification message")

                        .setContentIntent(pendingIntent).setNumber(1).getNotification(); 

notify.flags |= Notification.FLAG_AUTO_CANCEL; // FL

manager.notify(1,notify);

查看上面代码发现是没有设置 icon引起的。