57 lines
2.0 KiB
Kotlin
57 lines
2.0 KiB
Kotlin
package com.xscm.modulemain.utils
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import kotlinx.coroutines.CoroutineScope
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import kotlinx.coroutines.Job
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import kotlinx.coroutines.delay
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import kotlinx.coroutines.flow.MutableStateFlow
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import kotlinx.coroutines.flow.StateFlow
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import kotlinx.coroutines.launch
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class CountdownTimer {
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private var job: Job? = null
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private val _timeLeft = MutableStateFlow(0L)
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val timeLeft: StateFlow<Long> = _timeLeft
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fun startCountdown(endTimestamp: Long, scope: CoroutineScope) {
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job?.cancel()
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job = scope.launch {
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while (true) {
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val currentTime = System.currentTimeMillis() / 1000
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val remainingTime = (endTimestamp - currentTime) * 1000 // 转换为毫秒
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if (remainingTime <= 0) {
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_timeLeft.value = 0
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break
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}
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_timeLeft.value = remainingTime
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delay(1000)
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}
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}
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}
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fun stop() {
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job?.cancel()
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}
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/**
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* 将毫秒数格式化为 HH:MM:SS 格式的时间字符串
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* @param milliseconds 毫秒数（支持 0、负数、超大数值）
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* @return 格式化结果，如 3670000 毫秒 → 01:01:10，125000 毫秒 → 00:02:05
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*/
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fun formatTime(milliseconds: Long): String {
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// 1. 处理负数/0：转为非负，避免时间为负
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val nonNegativeMs = if (milliseconds < 0) 0 else milliseconds
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// 2. 计算总秒数（向下取整，不足1秒按0算）
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val totalSeconds = (nonNegativeMs / 1000).toInt()
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// 3. 拆分 小时、分钟、秒
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val hours = totalSeconds / 3600 // 1小时=3600秒
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val remainingSecondsAfterHour = totalSeconds % 3600 // 小时剩余秒数
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val minutes = remainingSecondsAfterHour / 60 // 分钟
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val seconds = remainingSecondsAfterHour % 60 // 秒
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// 4. 格式化：HH/MM/SS 均补0为2位（如 1小时1分5秒 → 01:01:05）
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return String.format("%02d:%02d:%02d", hours, minutes, seconds)
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}
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}
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