我有两个字符串变量，如开始时间和结束时间。我需要减去结束时间与开始时间计算对于totalTime。

I have two string variables such as StartTime and EndTime. I need to Calculate the TotalTime by subtracting the EndTime with StartTime.

开始时间和结束时间的格式类似如下：

The Format of StartTime and EndTime is as like follows:

StartTime = "08:00 AM";
EndTime = "04:00 PM";

TotalTime在小时和分钟]格式。如何计算这在Android中？

TotalTime in Hours and Mins Format. How to calculate this in Android?

推荐答案

尝试下面code。

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm");
date1 = simpleDateFormat.parse("08:00 AM");
date2 = simpleDateFormat.parse("04:00 PM");

long difference = date2.getTime() - date1.getTime(); 
days = (int) (difference / (1000*60*60*24));  
hours = (int) ((difference - (1000*60*60*24*days)) / (1000*60*60)); 
min = (int) (difference - (1000*60*60*24*days) - (1000*60*60*hours)) / (1000*60);
hours = (hours < 0 ? -hours : hours);
Log.i("======= Hours"," :: "+hours);

输出 - 开放时间：8

Output - Hours :: 8