Question

我似乎无法理解如何填充进度条。我正在使用倒数计时器更新进度条上的进度，使其倒计时直到达到零。现在我想要扭转进展并让它从零开始并填满，但我将如何实现这一目标呢？

public class theCountDownTimer extends CountDownTimer
{
    public theCountDownTimer(long millisInFuture, long countDownInterval)
    {
        super(millisInFuture, countDownInterval);
    }

    @Override
    public void onTick(long millisUntilFinished)
    {
        int progress = (int) (millisUntilFinished/100);
        progressBarCounter.setProgress(progress);
    }

    @Override
    public void onFinish()
    {
        Button nextInstance = (Button) findViewById(R.id.run);
        nextInstance.performClick();
    }
}

Answer 1

progressBar默认最大值为100。我想你希望它能在每个刻度线上前进，所以在theCountDownTimer里你应该定义：

progressBarCounter.setMax((int) millisInFuture/1000);

这样，如果你计算80秒（= 80,000mS），那么该栏的范围将在0到80之间。
接下来，您可以使用incrementProgressBy (int diff)方法：

public class theCountDownTimer extends CountDownTimer
{

  public theCountDownTimer(long millisInFuture, long countDownInterval)
  {
    super(millisInFuture, countDownInterval);
    progressBarCounter.setMax((int) millisInFuture/1000);
    progressBarCounter.setProgress(0);  //Reset the progress
  }

  @Override
  public void onTick(long millisUntilFinished)
  {
    progressBarCounter.incrementProgressBy(1);
  }

  @Override
  public void onFinish()
  {
    Button nextInstance = (Button) findViewById(R.id.run);
    nextInstance.performClick();
  }
}

我猜你在这里也有错误 -

int progress = (int) (millisUntilFinished/100);

您的意思是除以1000代替100吗？

在Android中，进度条倒数计时器的逻辑计数为“up”

1 个答案: