private static final int NOTIFICATION_ID = 123; public static final int MESSAGE_FAILED_NOTIFICATION_ID = 789; public static final int DOWNLOAD_FAILED_NOTIFICATION_ID = 531;
分别是收到新短信、发送短信失败、接收短信失败的3个Notification ID。
原文：http://www.cnblogs.com/mstk/p/4060789.html