android - 如何用秒和毫秒进行倒计时

Question

我正在与 android studio 合作开发一个从 10 秒开始倒计时的应用程序。我编写了代码，它工作正常，但它只显示剩余的秒数，现在我希望倒计时也显示毫秒。你能帮我吗？这是代码

public class MainActivity extends Activity {
TextView txtCount;
Button btnCount;
int count = 0;


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

    txtCount = (TextView)findViewById(R.id.textView1);
    txtCount.setText(String.valueOf(count));
    btnCount = (Button)findViewById(R.id.button1);

    btnCount.setOnClickListener(new View.OnClickListener() {
        public void onClick(View arg0) {
            count++;
            txtCount.setText(String.valueOf(count));
        }
    });
    final TextView textic = (TextView) findViewById(R.id.textView2);

    CountDownTimer Count = new CountDownTimer(10000, 1000) {
        public void onTick(long millisUntilFinished) {
            int seconds = (int) ((millisUntilFinished / 1000));

            textic.setText(seconds + "seconds " + millisUntilFinished / 1000);

        }

        public void onFinish() {
            textic.setText("TEMPO SCADUTO");
        }
    };

    Count.start();



}

Answer 1

//start button click
     CountDown timer = new CountDown(180000, 1000);
     timer.start();

//stop button click
timer.stop();   

    //countdown class
    public class CountDown extends CountDownTimer {

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

          @Override
          public void onTick(long millisUntilFinished) {
             long ms = millisUntilFinished;
             String text = String.format("%02d\' %02d\"",
                                         TimeUnit.MILLISECONDS.toMinutes(ms) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(ms)),
                                         TimeUnit.MILLISECONDS.toSeconds(ms) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(ms)));
             textViewTimer.setText(text);
          }

          @Override
          public void onFinish() {
             textViewTimer.setText("ffinish");
          }
       }