得到SD卡目录的方法:
public static String getExternalStorageDirectory() { return Environment.getExternalStorageDirectory() + "/"; }
很多情况下SD卡的目录都是mount/SDcard,但前提是你自己用并且你已经确认过了,如果你是开发给大众的,为了保险起见,你还是用这个方法吧!!!
public static String getExternalStorageDirectory() { return Environment.getExternalStorageDirectory() + "/"; }