这里使用CountDownTimer类来实现了一个倒计时进度条的库:

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import android.os.CountDownTimer;
import android.widget.ProgressBar;
 
public class CountdownProgressBar {
 
    private ProgressBar progressBar;
    private CountDownTimer countDownTimer;
 
    public CountdownProgressBar(ProgressBar progressBar, long countDownInterval) {
        this.progressBar = progressBar;
        startCountdown(countDownInterval);
    }
 
    private void startCountdown(long countDownInterval) {
        countDownTimer = new CountDownTimer(countDownInterval, 1000) {
            @Override
            public void onTick(long millisUntilFinished) {
                // 更新进度条的UI
                progressBar.setProgress((int) (millisUntilFinished / 1000));
            }
 
            @Override
            public void onFinish() {
                // 倒计时完成时的操作
                progressBar.setProgress(0);
            }
        }.start();
    }
 
    public void cancel() {
        countDownTimer.cancel();
    }
}

使用也很简单:

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// 假设你的ProgressBar在布局文件中定义了id为progress_bar
ProgressBar progressBar = (ProgressBar) findViewById(R.id.progress_bar);
 
// 创建倒计时进度条，倒计时10秒
CountdownProgressBar countdownProgressBar = new CountdownProgressBar(progressBar, 10000);
 
// 当你需要取消倒计时时
countdownProgressBar.cancel();