android 时间工具类

 主要事项：

1.时间差以24小时为间隔

举例：

2024-08-10 11:59:00到2024-08-11 11:59:00 ，时间差是1天

2024-08-10 11:59:00到2024-08-11 12:59:00 ，时间差是2天

2.时间差以日期为间隔

举例：

2024-08-10 11:59:00到2024-08-11 13:59:00 ，时间差是1天

2024-08-11 11:59:00到2024-08-11 12:59:00 ，时间差还是0天

日期是同1天，或者日期只差1天

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()
 
/**
          /**
         * 比较两个日期是不是同一天
         * */
        private fun areTimestampsOnSameDay(start: Long, end: Long): Boolean {
            val date1 = Date(start)
            val date2 = Date(end)
 
            val calendar1 = Calendar.getInstance()
            calendar1.time = date1
 
            val calendar2 = Calendar.getInstance()
            calendar2.time = date2
 
            // 比较年份、月份和日期部分
            return calendar1.get(Calendar.YEAR) == calendar2.get(Calendar.YEAR) &&
                    calendar1.get(Calendar.MONTH) == calendar2.get(Calendar.MONTH) &&
                    calendar1.get(Calendar.DAY_OF_MONTH) == calendar2.get(Calendar.DAY_OF_MONTH)
        }
 
        /**
         * 计算差的天数，只要过了24小时就算差1天
         * */
        fun calculateDaysAs24HourIntervals(timestamp1: Long, timestamp2: Long): Int {
            val differenceInMillis = abs(timestamp2 - timestamp1)
            return (differenceInMillis / (1000 * 60 * 60 * 24)).toInt()
        }
 
        /**
         * 计算两个时间戳的差值，单位是天，以日期为天数差
         * */
        fun calculateDaysBetweenDates(timestamp1: Long, timestamp2: Long): Int {
            val calendar1 = Calendar.getInstance()
            calendar1.timeInMillis = timestamp1
            calendar1[Calendar.HOUR_OF_DAY] = 0
            calendar1[Calendar.MINUTE] = 0
            calendar1[Calendar.SECOND] = 0
            calendar1[Calendar.MILLISECOND] = 0
 
            val calendar2 = Calendar.getInstance()
            calendar2.timeInMillis = timestamp2
            calendar2[Calendar.HOUR_OF_DAY] = 0
            calendar2[Calendar.MINUTE] = 0
            calendar2[Calendar.SECOND] = 0
            calendar2[Calendar.MILLISECOND] = 0
 
            return ((calendar2.timeInMillis - calendar1.timeInMillis) / (1000 * 60 * 60 * 24)).toInt()
        }
    }
}