设置进度条位置

Question

我需要进度条巫婆位置取决于以毫秒为单位的两个时间戳值，因此它取决于未来时间戳、过去时间戳和当前时间戳。

例如，我的时间戳为 08:46:11 30.06.2019 和 10:46:11 30.06.2019。但是当前时间是 09:46:11 30.06.2019，所以现在进度条应该填充 50% 并上升到 100 直到 10:46:11 30.06.2019

我已经尝试了下一个代码，但现在我明白使用 CountDownTimer 是没用的，它不适合我上面描述的任务：

private void progressBar(){
            prBar.setProgress(i);
            mCountDownTimer=new CountDownTimer(ltimestampStop * 1000,ltimestampStart * 1000) {

                @Override
                public void onTick(long millisUntilFinished) {
                    Log.v("Log_tag", "Tick of Progress"+ i+ millisUntilFinished);
                    i++;
                    int Start = ltimestampStart.intValue();
                    int Stop = ltimestampStop.intValue();
                    prBar.setProgress((int)i*100/(Stop/Start));

                }

                @Override
                public void onFinish() {
                    //Do what you want
                    i++;
                    prBar.setProgress(100);
                }
            };
            mCountDownTimer.start();
        }

那么我应该怎么做才能在取决于未来时间、过去时间和现在时间的某个位置创建进度条？

Answer 1

您可以尝试以下操作：

long startTimeInMillis = ...;     // 08:46:11 30.06.2019
long stopTimeInMillis = ...;      // 10:46:11 30.06.2019
long currentTimeInMillis = ...;   // 09:46:11 30.06.2019
long totalTimeInMilis = stopTimeInMillis - startTimeInMillis;

// Standart logic
long remainingTimeInMillis = stopTimeInMillis - currentTimeInMillis;
// But this line assures remaining time is not greater than total time
long remainingTimeInMillis = currentTimeInMillis < startTimeInMillis ?
        totalTimeInMilis : stopTimeInMillis - currentTimeInMillis;

// Update every second
long countDownIntervalInMillis = 1000;
// Alternatively you can adjust interval such that it is called only in integer percent changes
int remainingSteps = (int) (((double) remainingTimeInMillis / totalTimeInMilis) * 100);
long countDownIntervalInMillis = remainingTimeInMillis / remainingSteps;

mCountDownTimer = new CountDownTimer(remainingTimeInMillis, countDownIntervalInMillis) {

    @Override
    public void onTick(long millisUntilFinished) {
        int completedPercent = (int) ((1 - (double) millisUntilFinished / totalTimeInMilis) * 100);
        prBar.setProgress(completedPercent);
    }

    @Override
    public void onFinish() {
        // Do what you want
        prBar.setProgress(100);
    }
};
mCountDownTimer.start();