..-365.3菜单功能..........................................................................................-385.3.1菜单界面...............................................................................-385.3.2菜单功能实现.......................................................................-395.4播放设置界面..................................................................................-415.4.1界面实现...............................................................................-415.4.2歌词显示实现.......................................................................-425.5手机扩展卡的访问..........................................................................-445.5.1文件浏览器界面...................................................................-455.5.2文件浏览器功能实现...........................................................-465.6数据存储方式..................................................................................-475.6.1SharedPreferences..................................................................-475.6.2File存储方式...........................