如何在kotlin中生成10ms计时器

Question

我想在Kotlin中为我的魔方解算器应用程序生成10毫秒，我该怎么做？我有一个自定义视图，它是一个计时器，我想每10毫秒更新一次计时器

Answer 1

您需要将outputText替换为要显示它的内容

倒计时的代码：

val ttlTime: Long = // input the amount of ms here
        object : CountDownTimer(ttlTime, 10) {
            override fun onTick(millisUntilFinished: Long) {
                outputText.text = "time remaining: " + millisUntilFinished / 10
            }

            override fun onFinish() {
                // code for what needs to happen after the countdown is finished
            }
        }.start()

如果您想正确显示它：

val ttlTime: Long = // input the amount of ms here
object : CountDownTimer(ttlTime, 10) {
    override fun onTick(millisUntilFinished: Long) {
        val microSecond = millisUntilFinished.toString().takeLast(3)
        val second = (millisUntilFinished / 1000) % 60
        val minute = millisUntilFinished / (1000 * 60) % 60
        var finalTime = microSecond

        if (second > 0) {
           finalTime = "$second $finalTime"
           if (minute > 0) {
               finalTime = "$minute $finalTime"
           }
        } else if (minute > 0) {
           finalTime = "$minute 0 $finalTime"
        }
        outputText.text = "time remaining: $finalTime"
    }

    override fun onFinish() {
       // code for what needs to happen after the countdown is finished
    }
}.start()

资料来源：https://developer.android.com/reference/kotlin/android/os/CountDownTimer
（这是用java编写的，但如果你在android studio中粘贴它，你可以将其转换为kotlin）

如果你想让计时器上升：

val startTiming = Calendar.getInstance()

Handler().post(object : Runnable {
    override fun run() {
        Handler().postDelayed(this, 10)
        updateTime(startTiming)
    }
})

fun updateTime(startTime: Calendar) {
    val currentTime = Calendar.getInstance()

    val diff = currentTime.timeInMillis - startTime.timeInMillis
    val microSecond = diff.toString().takeLast(3)
    val second = (diff / 1000) % 60
    val minute = diff / (1000 * 60) % 60
    var finalTime = microSecond

    if (second > 0) {
        finalTime = "$second $finalTime"
        if (minute > 0) {
            finalTime = "$minute $finalTime"
        }
    }
    else if (minute > 0) {
        finalTime = "$minute 0 $finalTime"
    }

    outputText.text = finalTime
}

Answer 2

您可以像这样使用java中的计时器内联函数或计时器类

  val timer = timer(period = 10) {
        //Do something here
    }

安排要定期执行的操作，从指定的延迟（以毫秒为单位）开始，并以上一个任务结束到下一个任务开始之间的周期毫秒为间隔。

当您完成或您的活动或片段被破坏时，请记住取消计时器

计时器。取消