android 时间工具类

class UtilTime {

    companion object {
private val dateFormat = SimpleDateFormat("yyyy年MM月dd日", Locale.CHINA)
        private val dateFormatYmdHms = SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.CHINA)
        private val dateFormatYmd = SimpleDateFormat("yyyyMMdd", Locale.CHINA)
        private val mCalendar = Calendar.getInstance()

/**
         * 计算两个时间戳的差值，单位是天
         * */
        fun calculateDaysDifference(timestamp1: Long, timestamp2: Long): Int {
            val calendar1 = Calendar.getInstance()
            val calendar2 = Calendar.getInstance()
            val date1 = Date(timestamp1)
            calendar1.time = date1
            val date2 = Date(timestamp2)
            calendar2.time = date2

            val day1 = calendar1.get(Calendar.DAY_OF_MONTH)
            val day2 = calendar2.get(Calendar.DAY_OF_MONTH)

            // 将差值从毫秒转换为天
            return day2 - day1
        }
fun calculateDaysDifferenceString(timestamp1: String, timestamp2: String) : Long{
            // 定义时间格式
            val format = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")
            // 将时间戳字符串转换为 LocalDateTime 对象
            val dt1 = LocalDateTime.parse(timestamp1, format)
            val dt2 = LocalDateTime.parse(timestamp2, format)
            // 计算时间差
            val duration = Duration.between(dt1, dt2)

            // 计算差的天数，只要过了24小时就算差1天
            val daysDifference = duration.toDays() + if (duration.seconds % 86400 > 0) 1 else 0

            return daysDifference
        }

        fun calculateDayDifferenceV2(timestamp1: Long, timestamp2: Long): Long {
            // 计算时间差（以毫秒为单位）
            val diffInMillis = timestamp2 - timestamp1

            // 计算差的天数，只要过了24小时就算差1天
            val daysDifference = TimeUnit.MILLISECONDS.toDays(diffInMillis) + if (diffInMillis % TimeUnit.DAYS.toMillis(1) > 0) 1 else 0

            return daysDifference
        }
    }
}

原文地址：https://blog.csdn.net/Steve_XiaoHai/article/details/140466759

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