attachment 目录参考

文件
文件	AudioAttachment.java [代码]
文件	FileAttachment.java [代码]
文件	ImageAttachment.java [代码]
文件	LocationAttachment.java [代码]
文件	MsgAttachment.java [代码]
文件	MsgAttachmentParser.java [代码]
文件	NetCallAttachment.java [代码]
文件	NotificationAttachment.java [代码]
文件	NotificationAttachmentWithExtension.java [代码]
文件	VideoAttachment.java [代码]