如何在 android 中创建慢速秒表？

Question

我想在 android 中创建一个从 1 秒开始的 slow 秒表。除了一件事，一切都很好。我希望它是 slow 意思是：

1.000/s //Start Time
1.001/s //After 10ms
1.002/s //After another 10ms

这不是真正的秒表，但它有点像。对于我正在创建的游戏，我需要它每 10 毫秒增加一次时间。请在模拟器或真实设备上测试代码以便更好地理解。

代码：

private void startTime() {

    final long startTime = SystemClock.uptimeMillis();

    timeHandler = new Handler(); //Handler
    timeRunnable = new Runnable() { //Runnable
        @Override
        public void run() {
            long timeInMilliseconds = SystemClock.uptimeMillis() - startTime + 1000; //Start time is 1.000/s
            int secs = (int) (timeInMilliseconds / 1000);
            int mins = secs / 60;
            secs = secs % 60;
            int milliseconds = (int) (timeInMilliseconds % 1000);
            if (timeInMilliseconds > 60000) {
                score.setText(mins + ":" + String.format("%02d", secs) + "." + String.format("%03d", milliseconds) + "/s");
            } else {
                score.setText(String.format("%01d", secs) + "." + String.format("%03d", milliseconds) + "/s");
            }
            timeHandler.postDelayed(this, 0);
        }
    };

    timeHandler.postDelayed(timeRunnable, 0);
}

请注意，分数只是一个显示时间的普通 TextView。请帮我。谢谢

Answer 1

经过反复试验，我找到了一个非常简单的解决方案，我将post放在这里，以防将来有人遇到像我一样的问题。

private void startTime() {

    final long startTime = SystemClock.uptimeMillis();

    timeHandler = new Handler();
    timeRunnable = new Runnable() {
        @Override
        public void run() {

            //Note the difference in the first two lines here.
            long timeInMilliseconds = SystemClock.uptimeMillis() - startTime;
            //You can change this 20 according to what you want.
            timeInMilliseconds = (timeInMilliseconds / 20) + 1000;

            int secs = (int) (timeInMilliseconds / 1000);
            int mins = secs / 60;
            secs = secs % 60;
            int milliseconds = (int) (timeInMilliseconds % 1000);
            if (timeInMilliseconds > 60000) {
                score.setText(mins + ":" + String.format("%02d", secs) + "." + String.format("%03d", milliseconds) + "/s");
            } else {
                score.setText(String.format("%01d", secs) + "." + String.format("%03d", milliseconds) + "/s");
            }
            timeHandler.postDelayed(timeRunnable, 0);
        }
    };

    timeHandler.postDelayed(timeRunnable, 0);
}

现在，秒表速度已经降低。 我把时间每 20ms 增加 1ms 而不是之前问题中提到的 10ms 因为这样更适合我。当然你可以把这个20改成任何你想要的。

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