手机通讯录，支持数据的备份与还原。防止信息内容丢失。-Phone contacts, support for data backup and restore. Prevent loss of information content.

一个小型Android通讯录，功能：添加、删除、修改、查找、联系人头像添加，数据的备份、还原-A small Android address book functions: add, delete, modify, search, add contact picture, data backup, restore,