android - 取消 android CountDownTimer

Question

在我的应用程序中，我使用了 CountDownTimer，并希望用户能够重置应用程序中的数据并重新开始。我遇到的问题是，如果您在 3 分钟后启动一个计时器，然后在短时间后调用我的重置功能将所有分数设置回其初始值，然后在 10 分钟后启动一个新计时器。 ... 计时器立即从停止的地方开始计时，说 2:24、2:23、2:22 ......

我到处都读到的所有内容都说你调用 countdowntimername.cancel();然后设置 countdowntimername = null;

我就是这样做的，但根本不起作用。必须有更有效的方法来杀死这些计时器吗？有什么想法吗？

酱料:

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();
        }
    }
}

还有:

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();
    }

和重置方法:

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。这就是我首先实例化计时器的方式，然后在重置后再次实例化。从用户那里获取数据并将其转换为毫秒以传递给倒数计时器:

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

看起来让它工作的方法是让你的计时器成为全局计时器，然后在全局变量上调用取消。
参见 https://stackoverflow.com/a/27730328/1410671和 https://stackoverflow.com/a/23630959/1410671

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

private CountDownTimer countDownTimer;

然后在其他方法中引用它

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