Question

我必须在seekTo()类的MediaPlayer方法中使用一些字符串时间，但这些格式为0:01.432。

现在如何将其转换为毫秒？

Answer 1

我创建了这两种将文本转换为int

的方法

private static int convert(String time) {
    int quoteInd = time.indexOf(":");
    int pointInd = time.indexOf(".");

    int min = Integer.valueOf(time.substring(0, quoteInd));
    int sec = Integer.valueOf(time.substring(++quoteInd, pointInd));
    int mil = Integer.valueOf(time.substring(++pointInd, time.length()));

    return (((min * 60) + sec) * 1000) + mil;
}

和int到文本

private static String convert(final int duration) {
    int dur, min, sec, mil;

    dur = duration;
    min = dur / 60000;
    dur -= min * 60000;
    sec = dur / 1000;
    dur -= sec * 1000;
    mil = dur;

    return min + ":" + sec + "." + mil;
}

Answer 2

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

String.format("%d min, %d sec", 
TimeUnit.MILLISECONDS.toMinutes(millis),
TimeUnit.MILLISECONDS.toSeconds(millis) - 
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis))
);

如果要为值0-9添加前导零，请...

String.format("%02d min, %02d sec", 
TimeUnit.MILLISECONDS.toMinutes(millis),
TimeUnit.MILLISECONDS.toSeconds(millis) - 
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis))
);

对于1.5以下的Java版本或不完全支持TimeUnit类的系统，如...

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

Answer 3

有点长的方法，但你可以尝试这个，它应该可以工作：

String time = "0:01.432";
   String[] time1 = time.split(":");
   String Minutes = time1[0]; //You get your Minutes here
   long min = Integer.parseInt(Minutes); //Converting into Integer

   String Sec_mSec=time1[1]; //Seconds & MilliSeconds
   String[] time2 =Sec_mSec.split("."); //Splitting Both

   String Seconds = time2[0]; //You get your Seconds here

   long sec = Integer.parseInt(Seconds); //Converting into Integer
   String mSeconds = time2[1]; //You get your Milli Seconds here
   long t = (min * 60) + sec;
   long result = TimeUnit.SECONDS.toMillis(t); //Minutes and Seconds in Millis
   long msec = Integer.parseInt(mSeconds); //Converting into Integer

   long f_result=result+msec //Final Result

将字符串时间转换为毫秒

3 个答案: