java Android：将分钟和秒转换为毫秒
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Android: Converting minutes and seconds to millisecond
提问by Hammad Tariq
I am trying to convert time which I have in static string such as "07:02" into milliseconds. I am looking at documentation TimeUnitand trying to get my string to convert in milliseconds but first I have a string, so the converter function is not accepting string I guess and secondly I have both, minutes and seconds, so should I convert them one by one and then add them? Don't seem to be a nice approach?
我正在尝试将静态字符串中的时间（例如“07:02”）转换为毫秒。我正在查看文档TimeUnit并试图让我的字符串以毫秒为单位进行转换，但首先我有一个字符串，所以我猜转换器函数不接受字符串，其次我有分钟和秒，所以我应该将它们转换为一个然后添加它们？似乎不是一个好方法？
TimeUnit.MILLISECONDS.convert(10L, TimeUnit.MINUTES)
回答by Husman
I have just checked the documentation for TimeUnit. You could do something like this:
我刚刚检查了 TimeUnit 的文档。你可以这样做：
String time = "07:02";
long min = Integer.parseInt(time.substring(0, 2));
long sec = Integer.parseInt(time.substring(3));
long t = (min * 60L) + sec;
long result = TimeUnit.SECONDS.toMillis(t);
回答by mksteve
I came up with the following approach.
我想出了以下方法。
Split the time by the ':' and use the TimeUnit function.
按“:”分割时间并使用 TimeUnit 函数。
int convertTime(String timeString) {
String[] time = timeString.split ( ":" );
int pos = time.length - 1;
long res = 0;
if( pos >=0 ){
res = res + TimeUnit.SECONDS.toMillis( Long.parseLong( time[pos] ));
pos --;
}
if( pos >=0 ){
res = res + TimeUnit.MINUTES.toMillis( Long.parseLong( time[pos] ));
pos --;
}
if( pos >=0 ){
res = res + TimeUnit.HOURS.toMillis( Long.parseLong( time[pos] ));
pos --;
}
return (int)res;
}
The code is more complex, as it should work with
代码更复杂，因为它应该与
10
1:10
01:10
1:10:20
回答by Husman
The algorithm would be as follows:
算法如下：
- convert to integer (int minutes, int seconds)
- convert the minutes to seconds (i.e. minutes*60;)
- add the converted minutes to the seconds (i.e. int total = (minutes*60) + seconds;)
- convert to milliseconds (i.e. milli = total/1000)
- 转换为整数（int 分钟，int 秒）
- 将分钟转换为秒（即分钟*60；）
- 将转换后的分钟与秒相加（即 int total = (minutes*60) + seconds;）
- 转换为毫秒（即毫秒 = 总计/1000）
