以分钟和秒为单位的倒数计时器

问题描述：

这是一个倒数计时器，我想在分秒内打印.ex(300000mili)5 分钟，然后数 4:60、4:59...这是我的代码的一部分

It's a countdown timer and i want to print in minutes and seconds. ex(300000mili)5 minutes, and count 4:60, 4:59... here is part of my code

final MyCounter timer = new MyCounter(300000,1000);
    blue.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            timer.start();
        }
    });
}
public class MyCounter extends CountDownTimer {

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

    @Override
    public void onFinish() {
        blue.setText("Live");
    }

    @Override
    public void onTick(long millisUntilFinished) {
        blue.setText((millisUntilFinished/60000)+":"+(millisUntilFinished/5000));
        // i tried this
    }
}

如果错过了 20 秒，我该如何设置振动?什么时候完成?感谢并抱歉我的英语不好

And how can i put to vibrate when missing 20 seconds? and when it finished? thanks and sorry for my bad english

答

http://developer.android.com/reference/android/os/CountDownTimer.html

TextView _tv = (TextView) findViewById( R.id.textView1 );
new CountDownTimer(30000, 1000) { // adjust the milli seconds here

    public void onTick(long millisUntilFinished) {
    _tv.setText(""+String.format("%d min, %d sec", 
                    TimeUnit.MILLISECONDS.toMinutes( millisUntilFinished),
                    TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) - 
                    TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))));
    }

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

从 java 1.5 开始就有 java.util.concurrent.TimeUnit 类

Since java 1.5 there is the java.util.concurrent.TimeUnit class

 _tv.setText(""+String.format("%d min, %d sec", 
                    TimeUnit.MILLISECONDS.toMinutes( millisUntilFinished),
                    TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) - 
                    TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))));

http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/TimeUnit.html

TimeUnit 表示给定粒度单位的持续时间，并提供实用方法来跨单位转换，并以这些单位执行计时和延迟操作.

A TimeUnit represents time durations at a given unit of granularity and provides utility methods to convert across units, and to perform timing and delay operations in these units.

对于低于 1.5 的 Java 版本或不完全支持 TimeUnit 类的系统，可以使用以下等式:

For Java versions below 1.5 or for systems that do not fully support the TimeUnit class the following equations can be used:

int seconds = (int) (milliseconds / 1000) % 60 ;
int minutes = (int) ((milliseconds / (1000*60)) % 60);
int hours   = (int) ((milliseconds / (1000*60*60)) % 24);

振动

 Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
            // Vibrate for 500 milliseconds
            v.vibrate(500);
  <uses-permission android:name="android.permission.VIBRATE"/> // permission in manifest

以 4 分 55 秒振动 500 毫秒

Vibrate at 4 min 55 seconds for 500 milli seconds

 if((TimeUnit.MILLISECONDS.toMinutes( millisUntilFinished)==4) &&
                    TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) - 
                    TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))==55)
            {

            Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
            // Vibrate for 500 milliseconds
            v.vibrate(500);
            }

以分钟和秒为单位的倒数计时器

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