倒数计时器时间与Android中的实际时间之间的区别？

Question

我的活动中有一个倒数计时器。 其中我将分钟转换为毫秒。

基于该毫秒，我已经设法使用 CountDownTimer 对抗 HH: mm: ss。

所以，我想要主要时间和剩余时间之间的差异。

例如，我的主要时间是 00:10:00，当我停止计数器时，假设我的剩余时间是 00:07:30。表示我花了 2:30 秒

我想要的预期结果是 150 秒。

示例代码：

public class MainActivity extends AppCompatActivity {

int duration;
TextView textView;
ProgressBar progressbar;
Button btn_stop, btn_resume;
CountDownTimer counter;
int i = 1;
int remainingDuration;
int countDownInterval = 1000;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    textView = (TextView) findViewById(R.id.tvSampleText);
    progressbar = (ProgressBar) findViewById(R.id.progressbar);
    btn_stop = (Button) findViewById(R.id.btn_stop);
    btn_resume = (Button) findViewById(R.id.btn_resume);

    // duration=81200000; //6 hours
    duration = (int) TimeUnit.MINUTES.toMillis(1);
    counter = new MyCount(duration, countDownInterval);
    counter.start();

    btn_stop.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            counter.cancel();
        }
    });

    btn_resume.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            counter = new MyCount(remainingDuration, countDownInterval);
            counter.start();
        }
    });
}

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

    @Override
    public void onFinish() {
        textView.setText("00:00:00");
    }

    @Override
    public void onTick(long millisUntilFinished) {
        i++;
        long secondsInMilli = 1000;
        long minutesInMilli = secondsInMilli * 60;
        long hoursInMilli = minutesInMilli * 60;

        long elapsedHours = millisUntilFinished / hoursInMilli;
        millisUntilFinished = millisUntilFinished % hoursInMilli;

        long elapsedMinutes = millisUntilFinished / minutesInMilli;
        millisUntilFinished = millisUntilFinished % minutesInMilli;

        long elapsedSeconds = millisUntilFinished / secondsInMilli;

        String yy = String.format("%02d:%02d:%02d", elapsedHours, elapsedMinutes, elapsedSeconds);
        textView.setText(yy);

        progressbar.setProgress((int) i * 100 / (duration / (int) secondsInMilli));
        remainingDuration = (int) millisUntilFinished;
    }
  }
}

Answer 1

首先将分钟持续时间转换为秒

long secs = minutes * 60; 10 * 60 = 600

在tick里面，你会得到以毫秒为单位的剩余时间，所以将值保留为全局引用并将其转换为秒

long mMillisUntilFinished;


void onTick (long millisUntilFinished){
    // mMillisUntilFinished = 450000
    mMillisUntilFinished = millisUntilFinished;
}

然后当您按下停止时，将重命名时差设为

---

long diffSeconds = secs - (mMillisUntilFinished / 1000)
//                 600  - (450000 /1000)
//                 600  - 450
//                 150 

---

更新：按照建议，计算持续时间和剩余时间的秒数，然后减去它们以获得结果。 使用long 而不是int 强制转换

@Override
public void onTick(long millisUntilFinished) {
    i++;
    long secondsInMilli = 1000;
    long minutesInMilli = secondsInMilli * 60;
    long hoursInMilli = minutesInMilli * 60;
    long tempMili = millisUntilFinished;

    long elapsedHours = tempMili / hoursInMilli;
    tempMili = tempMili % hoursInMilli;

    long elapsedMinutes = tempMili / minutesInMilli;
    tempMili = tempMili % minutesInMilli;

    long elapsedSeconds = tempMili / secondsInMilli;

    String yy = String.format("%02d:%02d:%02d", elapsedHours, elapsedMinutes, elapsedSeconds);
    textView.setText(yy);

    progressbar.setProgress((int) i * 100 / (duration / (int) secondsInMilli));
    remainingDuration = (duration/ 1000) - (millisUntilFinished/1000);
}