你试过用TimeZone.getDefault():

大多数应用程序将使用返回基于 TimeZone 的 TimeZone.getDefault()在程序运行的时区.

Most applications will use TimeZone.getDefault() which returns a TimeZone based on the time zone where the program is running.

参考:http://developer.android.com/reference/java/util/TimeZone.html