如何检查以毫秒为单位的时间是否是今天的时间并且与当前时间相差不到 10 秒？

如何解决如何检查以毫秒为单位的时间是否是今天的时间并且与当前时间相差不到 10 秒？

我从服务器响应中以字符串形式获取时间戳..

KS100V1C1-2C3AE8176DC1\1 {"timestamp":"3:7:2021 16:01:38","ChannelId_1":100}
KS100V1C1-2C3AE8176DC1\1 {"timestamp":"3:7:2021 16:01:48","ChannelId_1":100}
KS100V1C1-2C3AE8176DC1\1 {"timestamp":"3:7:2021 16:01:58","ChannelId_1":100}

我在 10 秒的间隔内得到这个，如图所示是响应 38 秒、48 秒、58 秒...

我想检查时间戳是否是今天的，是当前时间 10 秒以下的时间。就像时间戳是 "3:7:2021 16:01:38" 而当前时间是 "3:7:2021 16:01:48" 一样，它应该返回 true。

我已将 String 转换为 Date，然后转换为 Long，如下所示：

fun convertTimetoLong(time: String) : Long {
    val formatter: DateFormat = SimpleDateFormat("dd:mm:yyyy hh:mm:ss")
    val date = formatter.parse(time) as Date
    Log.d("LongTime : ",date.time.toString())
    return date.time
}

并检查时间是否低于 10 秒，我试过这个：

private val TEN_SECONDS = 10 * 60 * 10000

fun isTimeUnder10Seconds(timeStamp: Long): Boolean {
    val tenAgo: Long = System.currentTimeMillis() - TEN_SECONDS
    if (timeStamp < tenAgo) {
        Log.d("10Seconds ?"," is older than 10 seconds")
        return true
    } else {
        Log.d("10Seconds ?"," is not older than 10 seconds")
        return false
    }
}

但这似乎没有按预期工作。请帮忙。谢谢..

解决方法

我会通过java.time来做到这一点：

这是一个比较您的示例值的示例（并且不涉及当前时刻，该时刻位于底部）：

import java.time.LocalDateTime
import java.time.ZonedDateTime
import java.time.ZoneId
import java.time.format.DateTimeFormatter

fun main() {
    val isValid = isOfTodayAndNotOlderThanTenSeconds("6:7:2021 16:01:38","6:7:2021 16:01:48")
    println(isValid)
}

fun isOfTodayAndNotOlderThanTenSeconds(time: String,otherTime: String) : Boolean {
    // provide a formatter that parses the timestamp format
    val dtf = DateTimeFormatter.ofPattern("d:M:uuuu HH:mm:ss")
    // provide a time zone
    val zone = ZoneId.of("UTC")
    // parse the two arguments and apply the same zone to each
    val other = LocalDateTime.parse(otherTime,dtf).atZone(zone)
    val thatTime = LocalDateTime.parse(time,dtf).atZone(zone)
    // finally return if the days/dates are equal
    return thatTime.toLocalDate().equals(other.toLocalDate())
            // and the first argument is at most 10 seconds older
            && !thatTime.isBefore(other.minusSeconds(10))
}

这实际上返回/打印 true。

如果您想将其与现在进行比较，请调整此 fun 以仅采用一个参数并更改要比较的对象：

fun isOfTodayAndNotOlderThanTenSeconds(time: String) : Boolean {
    // provide a formatter that parses the timestamp format
    val dtf = DateTimeFormatter.ofPattern("d:M:uuuu HH:mm:ss")
    // provide a time zone
    val zone = ZoneId.of("UTC")
    // take the current moment in time in the defined zone
    val other = ZonedDateTime.now(zone)
    // parse the argument and apply the same zone
    val thatTime = LocalDateTime.parse(time,dtf).atZone(zone)
    // finally return if the days/dates are equal
    return thatTime.toLocalDate().equals(other.toLocalDate())
            // and the argument is at most 10 seconds older
            && !thatTime.isBefore(other.minusSeconds(10))
}