一个手机通讯录的实现，电话簿功能描述(1)查看电话记录（2)添加电话记录(3)查找电话(4)在电话簿中永久存储电话信息-a realization of the phone directory, telephone directories functional descr iption (1) View telephone records (2) Add phone records (3) Locating telephone (4)