取消android CountDownTimer

Question

在我的应用程序中，我使用的是CountDownTimer，希望用户能够重新设置应用程序中的数据并重新开始。我遇到的问题是，如果你启动一个计时器，比如说，3分钟，然后过了很短的时间，你调用我的重置函数，将所有分数设置为初始值，然后启动一个新的计时器，例如，10分钟.计时器立即拿起它停止说2:24，2:23，2:22……

我在任何地方读到的东西都说您调用countdowntimername.cancel()，然后设置countdowntimername = null；

我就是这样做的，这根本行不通。一定有更有效的方法杀死这些计时器吗？有什么想法吗？

酱汁：

private void toggleTimer() {
    if (timerStarted == false) {
        final CountDownTimer countDownTimer = new CountDownTimer(startTime, interval) {

            public void onTick(long millisUntilFinished) {
                    if (timerPaused == true) {
                        cancel();
                    } else {
                        timeRemaining = millisUntilFinished;
                        long remainder = millisUntilFinished;
                        minuteTens = df.format(millisUntilFinished / 600000);
                        remainder = remainder - (Integer.valueOf(minuteTens) * 600000);
                        minuteOnes = df.format(remainder / 60000);
                        remainder = remainder - (Integer.valueOf(minuteOnes) * 60000);
                        secondTens = df.format(remainder / 10000);
                        remainder = remainder - (Integer.valueOf(secondTens) * 10000);
                        secondOnes = df.format(remainder / 1000);
                        setCountdownText();
                    }
            }

            public void onFinish() {
                minuteTens = "0";
                minuteOnes = "0";
                secondTens = "0";
                secondOnes = "0";
                setCountdownText();
                timerStarted = false;
                Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
                v.vibrate(1000);
            }
        }.start();
        timerStarted = true;
    } else {
        if (timerPaused == false) {
            pauseTimer();
        } else {
            resumeTimer();
        }
    }
}

还包括：

private void resumeTimer() {
    timerPaused = false;
    startTime = timeRemaining;
        CountDownTimer countDownTimer = new CountDownTimer(startTime, interval) {

            public void onTick(long millisUntilFinished) {
                if (timerPaused == true) {
                    cancel();
                } else {
                    timeRemaining = millisUntilFinished;
                    long remainder = millisUntilFinished;
                    minuteTens = df.format(millisUntilFinished / 600000);
                    remainder = remainder - (Integer.valueOf(minuteTens) * 600000);
                    minuteOnes = df.format(remainder / 60000);
                    remainder = remainder - (Integer.valueOf(minuteOnes) * 60000);
                    secondTens = df.format(remainder / 10000);
                    remainder = remainder - (Integer.valueOf(secondTens) * 10000);
                    secondOnes = df.format(remainder / 1000);
                    setCountdownText();
                }
            }

            public void onFinish() {
                minuteTens = "0";
                minuteOnes = "0";
                secondTens = "0";
                secondOnes = "0";
                setCountdownText();
                timerStarted = false;
                Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
                v.vibrate(1000);
            }
        }.start();
    }

以及重置方法：

private void resetScores() {
    final TextView P1CountDownTimer = (TextView) findViewById(R.id.P1CountDownTimer);
    final TextView P2CountDownTimer = (TextView) findViewById(R.id.P2CountDownTimer);
    timerStarted = false;
    timerPaused = false;
    minuteTens = "0";
    minuteOnes = "0";
    secondTens = "0";
    secondOnes = "0";
    if (countDownTimer != null) {
        countDownTimer.cancel();
        countDownTimer = null;
    }
    setCountdownText();
    P1CountDownTimer.setVisibility(View.INVISIBLE);
    P2CountDownTimer.setVisibility(View.INVISIBLE);
}

编辑：

这也是相关的。这是我如何实例化定时器的第一步，然后再重新设置。从用户获取数据，并将其转换为毫秒以传递到计数下定时器：

private void resetTimer() {
    final TextView P1CountDownTimer = (TextView) findViewById(R.id.P1CountDownTimer);
    final TextView P2CountDownTimer = (TextView) findViewById(R.id.P2CountDownTimer);
    startTime = ((Tens * 60) + (Ones)) * 1000;
    timeRemaining = startTime;
    if (startTime > 0) {
        long remainder = startTime;
        minuteTens = df.format(startTime / 600000);
        remainder = remainder - (Integer.valueOf(minuteTens) * 600000);
        minuteOnes = df.format(remainder / 60000);
        remainder = remainder - (Integer.valueOf(minuteOnes) * 60000);
        secondTens = df.format(remainder / 10000);
        remainder = remainder - (Integer.valueOf(secondTens) * 10000);
        secondOnes = df.format(remainder / 1000);
        setCountdownText();
        P1CountDownTimer.setVisibility(View.VISIBLE);
        P2CountDownTimer.setVisibility(View.VISIBLE);
    }
}

Answer 1

使其工作的方法似乎是使您的定时器全局化，然后调用全局var上的cancel。

见https://stackoverflow.com/a/27730328/1410671和https://stackoverflow.com/a/23630959/1410671

我假设这些方法都在活动类中，在这种情况下，您将在活动类的顶部声明您的CountDownTimer

private CountDownTimer countDownTimer;

然后在后面的其他方法中引用它，如

countDownTimer = new CountDownTimer(startTime, interval) {...}