java - 以分钟和秒为单位的倒数计时器

Question

这是一个倒数计时器，我想以分秒为单位进行打印。 ex(300000mili)5 分钟，然后数 4:60、4:59...这是我的部分代码

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
    }
}

当错过 20 秒时，我该如何设置振动？什么时候结束？谢谢，对不起我的英语不好

Answer 1

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 开始有 java.util.concurrent.TimeUnit 类

 _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，并在这些单位中执行计时和延迟操作。

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:

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

编辑:

在 4 分 55 秒时振动 500 毫秒

 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);
            }