Question

我正在尝试制作一个倒计时应用程序，其中最长时间不到10分钟，我希望它显示为mm：ss：ms（不太确定ms是毫秒的术语）。这就是我在这里

        text = (TextView) this.findViewById(R.id.counterView);
    new CountDownTimer(16069000, 10) { // adjust the milli seconds here
        public void onTick(long millisUntilFinished) {
            text.setText(""+String.format("%02d:%02d:%02d",
                    TimeUnit.MILLISECONDS.toHours(millisUntilFinished),
                    TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millisUntilFinished)),
                    TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))
                    ));
        }

        public void onFinish() {
            text.setText("done!");
        }
    }.start();

目前正在显示hh：mm：ss，我试图玩它，但无法让它运转起来。我试着将格式设为

＆＃34;％02D：％02D：％02D：％03D＆＃34;

但是当我试图在setText中添加毫秒部分时，我迷路了。

Answer 1

你明确地显示小时：分钟：这里的秒数：

        text.setText(""+String.format("%02d:%02d:%02d",
                TimeUnit.MILLISECONDS.toHours(millisUntilFinished),
                TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millisUntilFinished)),
                TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))
                ));

将其更改为：

        long m = TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished);
        long s = TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished - m*60*1000);
        long ms = millisUntilFinished - m*60*1000 - s*1000; 
        text.setText(""+String.format("%02d:%02d:%02d",m,s,ms));

Answer 2

这是代码

 CounterClass timer = new CounterClass(150000, 1000);  // set time here
  timer.start();

define class here

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

        @Override
        public void onFinish() {
            // timeTextView.setText("Completed.");

            this.cancel();

            finish();
        }

        public void onTick(long millisUntilFinished) {
            long millis = millisUntilFinished;
            caaryLong = millis;
            String hms = String.format(
                    "%02d:%02d",
                    TimeUnit.MILLISECONDS.toMinutes(millis)
                            - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS
                                    .toHours(millis)),
                    TimeUnit.MILLISECONDS.toSeconds(millis)
                            - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS
                                    .toMinutes(millis)));
            System.out.println(hms);

            timeTextView.setText(hms);
        }
    }

Answer 3

如果你使用android studio而不是有一个外部库

第1步：在build.gradle（模块应用）

编译＆＃39; joda-time：joda-time：2.9.1＆＃39;

第2步：在您的活动.xml文件中

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/ll_main"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/darker_gray"
    android:gravity="center_horizontal"
    android:orientation="vertical"
    tools:context="com.countdowntimer.MainActivity">

<TextView
        android:id="@+id/tv_milliseconds"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:gravity="center"
        android:text="MilliSeconds"
        android:textColor="@android:color/white"
        android:textSize="80sp" />

    <Chronometer
        android:id="@+id/chronometer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:visibility="gone" />
</LinearLayout>

第3步：初始化Textview和Chronometer

    CountDownTimer countDownTimer;
    private long startTime = 1000;
    private final long interval = 100;

第4步：在OnChronometerTickListener

chronometer.start();
chronometer.setBase(1);
chronometer.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {
            @Override
            public void onChronometerTick(Chronometer chronometer) {
                setDateTime();
            }
        });

第5步：创建功能

public void setDateTime() {
        countDownTimer = new MalibuCountDownTimer(startTime, interval);
        countDownTimer.start();  

} 

 public class MalibuCountDownTimer extends CountDownTimer {

        public MalibuCountDownTimer(long startTime, long interval) {
            super(startTime, interval);
        }

        @Override
        public void onFinish() {
        }

        @Override
        public void onTick(long millisUntilFinished) {
            tvMilliseconds.setText("" + millisUntilFinished);
        }
    }

Answer 4

我实际上设法使用以下代码text.setText(""+String.format("%02d:%02d:%03d", TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millisUntilFinished)), TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished)), TimeUnit.MILLISECONDS.toMillis(millisUntilFinished) - TimeUnit.SECONDS.toMillis(TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished)) ));

完成了它

Answer 5

迷路是什么意思？

如果您询问为毫秒部分输入的值，请使用

millisUntilFinished % 1000

android倒计时到毫秒

5 个答案: