Question

问题是：如何在倒计时期间从CountDownTimer添加或删除时间？

例如：用户做了一件好事：+ 5秒，用户做错了什么：-5秒。

有人可以帮我一些代码吗？

Answer 1

也许是这样的

abstract class MyTimer {

    public MyTimer(long deadline, long interval)
    {
        mDeadline = deadline;
        mInterval = interval; 

        mTimer = new MyCountDownTimer(mDeadline, mInterval);

    }

    public synchronized void start() {

       mTimer.start();

    }

    public abstract void onTick(long time);
    public abstract void onFinish();

    public synchronized void userDidRight() 
    {
        mTimer.cancel();
        mTimer = new MyCountDownTimer(mDeadline, mInterval += 5000);
        mTimer.start();
    }

    public synchronized void userDidWrong() 
    {
        mTimer.cancel();
        mTimer = new MyCountDownTimer(mDeadline, mInterfval -= 5000);
        mTimer.start();
    }


    private class MyCountDownTimer extends CountDownTimer() {

        private abstract void onFinish() {
            MyTimer.this.onFinish();
        }

        private abstract void onTick(long time) {
            MyTimer.this.onTick(time);
        }
    }

    private MyCountDownTimer mTimer;
}

Answer 2

每次用户更改时都可以重新启动计时器：

class Timer {
    private long remainingTime;
    private CoundDownTimer timer;

    public void addTime(long addedTimeInMillis) {
      createNewTimer(remainingTime + addedTimeInMills);
    }

    public void createNewTimer(long timeInMillis) {
       if(timer != null) {
         timer.cancel();
       }
       timer = new CountDownTimer(timeInMillis, 1000) {

       @Override
       public void onTick(final long millisUntilFinished) {
           remainingTime = millisUntilFinished;
       }

       @Override
       public void onFinish() {
           // do something here
       }
       }.start();

    }
}

Answer 3

private class startTimer extends CountDownTimer
{

    public startTimer(long millisInFuture, long countDownInterval)
    {
        super(millisInFuture, countDownInterval);
    }

    @Override
    public void onTick(long millisUntilFinished) {
        currenttime=millisUntilFinished;
        textview.setText("" + currenttime / 1000);
    }

    @Override
    public void onFinish() {
        textview.setText("done");
    }
}

上面的类是CountDownTimer的简单派生类

CountDownTimer timer = new CountDownTimer(30000,1000);
timer.start();
long currentTime;

例如，上述计时器从30秒开始，每秒减少一个。要动态增加或减少计时器，您可以取消旧计时器并使用新时间进行初始化，如下所示

 timer.cancel();
 timer = new CountDownTimer(currentTime+5000,1000);// +5000 to increase by 5 secs
 timer.start();

您可以将计时器，currentTime变量设为全局，然后您可以在不同位置使用代码的两个不同部分。

如何在CountDownTimer上添加和删除时间？

3 个答案: