[Android] 一天有幾毫秒? 一星期有幾毫秒? 一年有幾毫秒? 使用DateUtils的Constants! How many milliseconds in one Day? Week? Year?

一天有幾毫秒?
一星期有幾毫秒?
一年有幾毫秒?
使用DateUtils的Constants!

http://developer.android.com/reference/android/text/format/DateUtils.html

DateUtils.SECOND_IN_MILLIS
DateUtils.MINUTE_IN_MILLIS
DateUtils.HOUR_IN_MILLIS
DateUtils.DAY_IN_MILLIS
DateUtils.WEEK_IN_MILLIS
DateUtils.YEAR_IN_MILLIS