2012-12-06 46 views
0

我想在一秒钟播放声音文件一次,但如果我设置countDownInterval从100到700,我得到操作两次或三次(由于四舍五入)。如果我设置countDownInterval从700到1000,我得到一个范围从10到2的操作,但是如果我设置在1秒内播放一个声音文件,我得到两个播放,因为onTick四舍五入到一。 是的,我知道CountDownTimer is not precise。 感谢您的帮助!播放音乐一次CountDownTimer android

public void startTimer() { 
      tCountDownTimer = new CountDownTimer(tTime * 1000, 1000) {  
     @Override 
     public void onTick(long millisUntilFinished) { 
      int seconds = (int) (millisUntilFinished/1000);  
      int minutes = seconds/60; 
      int hours = minutes/60; 
      minutes = minutes % 60; 
      seconds = seconds % 60; 
      String curTime = hours + ":" + minutes + "::" + seconds; 
      Log.v("log_tag", "Log is here Time is now" + curTime); 
      tTimeLabel.setText(String.format("%02d:%02d:%02d", hours, minutes, seconds)); 
      runSec (seconds); 
      runMin (minutes); 
      runHou (hours); 
      if (seconds == 3) { 
       playAlertSound(R.raw.beep1); 
       } 
      else if(seconds == 2){ 
       playAlertSound(R.raw.beep1); 
       } 
      else if(seconds == 1){ 
       playAlertSound(R.raw.beep1); 
       } 
      else if(seconds == 0){ 
       playAlertSound(R.raw.beep2); 
       } 

如果我使用int seconds = Math.round(millisUntilFinished/1000);

12-06 19:16:54.320: V/log_tag(1121): Log is here Time is now0:0::4 
12-06 19:16:55.379: V/log_tag(1121): Log is here Time is now0:0::3 
12-06 19:16:56.437: V/log_tag(1121): Log is here Time is now0:0::2 
12-06 19:16:57.478: V/log_tag(1121): Log is here Time is now0:0::1 

如果我使用int seconds = Math.round(millisUntilFinished/1000f);

12-06 19:20:14.851: V/log_tag(1167): Log is here Time is now0:0::5 
12-06 19:20:15.885: V/log_tag(1167): Log is here Time is now0:0::4 
12-06 19:20:16.931: V/log_tag(1167): Log is here Time is now0:0::3 
12-06 19:20:17.973: V/log_tag(1167): Log is here Time is now0:0::2 

它`用户设定的时间在驯:

protected int tTime = 0; 

public void onClick(View v) { 
    if(v == upTimesl && tTime <= (11*60*60+1*59*60+55)) 
     settTime(tTime + 5); 
    else if(v == downTimesl && tTime > 5) 
     settTime(tTime - 5); 
    else if(v == downTimesl && tTime <= 5) 
      settTime(tTime=0); 
... 
+0

好的,'tTime'设置为什么? – Sam

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我看到CountDownTimer显示“5,4,3,2”并跳过“1”。这是我在[android CountDownTimer - 滴答之间的附加毫秒延迟]中修复的错误之一(http://stackoverflow.com/q/12762272/1267661)。 '1000f'的时间是正确的,因为你从5开始倒数。 – Sam

回答

0

数学你是不是四舍五入,你一个重新进行地板操作。如果millisUntilFinished/1000实际上是0.9999可以保证得到0。您应该使用Math.round()

int seconds = Math.round(millisUntilFinished/1000f);  

(请注意,我感到1000f分,潜水长一个整数仍是地板动作)

你当前的时间间隔是100ms,这是没有意义的,因为所有的计算都是以秒为单位的。您应该使用:

tCountDownTimer = new CountDownTimer(tTime * 1000, 1000) { 

而且CountDownTimer有几个怪癖:它增加了几毫秒到每一个间隔,经常打电话onFinish()之前跳过最后一个区间。我在这个班上做了一些改动,回到android CountDownTimer - additional milliseconds delay between ticks以消除这些错误。

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我同意你的四舍五入和延迟(测试不同的方法)。但如果我使用'int seconds = Math.round(millisUntilFinished/1000f);'计时器停止两秒钟。这里是日志文件: '12 -06 18:58:10.191:V/log_tag(649):日志在这里时间现在是0:0 :: 5 12-06 18:58:11.239:V/log_tag(649 ):日志在这里时间现在是0:0 :: 4 12-06 18:58:12.278:V/log_tag(649):日志在这里时间现在是0:0 :: 3 12-06 18:58:13.318 :V/log_tag(649):日志在这里时间现在是0:0 :: 2' – Roman

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将您的LogCat添加到您的问题中(点击左下角的“编辑”),以便我可以看到更多的LogCat。 – Sam