Android日历不显示一天的开始,00:00:00。

huangapple go评论33阅读模式
英文:

Android Calendar does not show start of day, 00:00:00

问题

以下是您要翻译的代码部分:

我正在尝试创建一个日历对象表示一天的开始或者00:00:00

这是我的代码

val calendarStart = Calendar.getInstance(TimeZone.getTimeZone("EST"), Locale.US)
calendarStart.time = Date()
calendarStart[Calendar.HOUR] = 0
calendarStart[Calendar.HOUR_OF_DAY] = 0
calendarStart[Calendar.MINUTE] = 0
calendarStart[Calendar.SECOND] = 0
calendarStart[Calendar.MILLISECOND] = 0
val utcStartDate = calendarStart.time

val calendarEnd = Calendar.getInstance(TimeZone.getTimeZone("EST"), Locale.US)
calendarEnd[Calendar.HOUR_OF_DAY] = 23
calendarEnd[Calendar.MINUTE] = 59
calendarEnd[Calendar.SECOND] = 59
calendarEnd[Calendar.MILLISECOND] = 999
val utcEndDate = calendarEnd.time

结束日期似乎没问题但是开始日期显示为01:00:00如调试日志的屏幕截图所示

有人能解释一下为什么它显示为1:00:00以及我如何创建一个一天的开始日历

*** **更新** ***

#snachmsm给出的答案是正确的并解决了问题但是我选择使用以下代码

val dayStart: LocalDateTime = now.with(LocalTime.MIN)
val zdtStart: ZonedDateTime = dayStart.atZone(ZoneId.systemDefault())
val startDate = Date.from(zdtStart.toInstant())

val dayEnd: LocalDateTime = now.with(LocalTime.MAX)
val zdtEnd: ZonedDateTime = dayEnd.atZone(ZoneId.systemDefault())
val endDate = Date.from(zdtEnd.toInstant())

请注意,代码中的特殊字符“"”已被还原为正常的双引号。

英文:

I am trying to create a Calendar object for the start of the day, or 00:00:00

Here is my code.

	val calendarStart = Calendar.getInstance(TimeZone.getTimeZone("EST"), Locale.US)
	calendarStart.time = Date()
	calendarStart[Calendar.HOUR] = 0
	calendarStart[Calendar.HOUR_OF_DAY] = 0
	calendarStart[Calendar.MINUTE] = 0
	calendarStart[Calendar.SECOND] = 0
	calendarStart[Calendar.MILLISECOND] = 0
	val utcStartDate = calendarStart.time

	val calendarEnd = Calendar.getInstance(TimeZone.getTimeZone("EST"), Locale.US)
	calendarEnd[Calendar.HOUR_OF_DAY] = 23
	calendarEnd[Calendar.MINUTE] = 59
	calendarEnd[Calendar.SECOND] = 59
	calendarEnd[Calendar.MILLISECOND] = 999
	val utcEndDate = calendarEnd.time

The end date seems ok, but the start date shows as 01:00:00 as seen in the screenshot of the debugger log.

Can someone explain to me why it show as 1:00:00 and how do I create a start of day calendar?

Android日历不显示一天的开始,00:00:00。

*** UPDATE ***

The answer #snachmsm gave was correct and did solve the issue. However, I opted to use this code instead:

	val dayStart: LocalDateTime = now.with(LocalTime.MIN)
	val zdtStart: ZonedDateTime = dayStart.atZone(ZoneId.systemDefault())
	val startDate = Date.from(zdtStart.toInstant())

	val dayEnd: LocalDateTime = now.with(LocalTime.MAX)
	val zdtEnd: ZonedDateTime = dayEnd.atZone(ZoneId.systemDefault())
	val endDate = Date.from(zdtEnd.toInstant())

答案1

得分: 1

请注意,您正在尝试获取“EST”时区,但日志显示“EDT”时区 - 与您的情况一样,差异为1小时。

根据此链接,Android中的“EST”不使用夏令时。尝试使用getTimeZone("America/New_York")

英文:

note that you are trying to get EST timezone and log shows EDT timezone - 1h of difference like in your case

according to THIS EST in Android doesn't use daylight saving. try to use getTimeZone("America/New_York")

huangapple
  • 本文由 发表于 2020年7月28日 11:27:51
  • 转载请务必保留本文链接:https://go.coder-hub.com/63126589.html
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定