Question

我需要在我的应用程序中将分钟转换为24小时格式，例如我的应用程序有一个方法以分钟为单位返回时间260，如何将此时间转换为24格式？

非常感谢，

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//Inside OnCreate Method

//For Time Part#1
CaseDurationH.setOnItemSelectedListener(new OnItemSelectedListener() {

             public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {

                 int i = CaseDurationH.getSelectedItemPosition();
                 strH = parent.getSelectedItem().toString();

                 try { 
                  intH = Integer.parseInt(strH); 
                  intHInMin=intH*60; // inH and intHInMin are a integer
                } catch (NumberFormatException nfe) { 

                } 


                 if(i==2){

                     CaseDurationM.setEnabled(false);

                 }

                 if(strH.equals("hr0"))

                         {

                 CaseDurationM.setEnabled(true);

                     }



                 if(strH.equals("hr1"))

                         {

                 CaseDurationM.setEnabled(true);

                     }





                 if(strH.equals("hr2"))

                         {

                     CaseDurationM.setEnabled(false);  

                     }


             }

             public void onNothingSelected(AdapterView<?> arg0) {

                 // TODO Auto-generated method stub



             } });

//For Time Part#2
        CaseDurationM.setOnItemSelectedListener(new OnItemSelectedListener() {

             public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {

                 int i = CaseDurationM.getSelectedItemPosition();
                 strM = parent.getSelectedItem().toString();


                 try { 
                      intM = Integer.parseInt(strM); 

                    } catch (NumberFormatException nfe) { 

                    } 





             }

             public void onNothingSelected(AdapterView<?> arg0) {

                 // TODO Auto-generated method stub



             } });

  String CaseTime= calc();
  case1.setTime(CaseTime); //case1 is an Onbject 



//Out OnCreate Method
private String calc() {

                      int CTimeTotalInMin= intHInMin + intM;
          Calendar calendar = new GregorianCalendar();

          int CurrentHour = calendar.get(Calendar.HOUR);
          int CurrentMinute = calendar.get(Calendar.MINUTE);
          int CurrentTime= (CurrentHour * 60)+ CurrentMinute;
          int TotalTimeInMin= CurrentTime-CTimeTotalInMin;
          int hours = TotalTimeInMin / 60; 
          int minutes = TotalTimeInMin % 60;  
          if(hours>23) 
             hours = hours % 24; 

       String g = ""+hours+":"+minutes;



         return g;}

我的问题是：我如何得到（当前时间 - 用户从Spinner中选择的时间（我向用户显示两个小时（0小时或1小时或2小时）和分钟（从0到59）的列表，如下所示，对于即时，如果用户选择（1小时）并且当前时间是（下午2:15），答案应该是= 13:15 PM），我尝试了这个代码，但它与PM和AM没有区别？任何建议？非常感谢...

<!-- @ string.xml these imtes for CDurationH= hours -->
    <string name="hr0">0</string>  
    <string name="hr1">1</string>  
    <string name="hr2">2</string> 
<!-- @ string.xml these imtes for CDurationM= minutes --> 
    <string name="min0">0</string> 
    <string name="min5">5</string> 
    <string name="min10">10</string>  
    <string name="min15">15</string> 
    <string name="min20">20</string>  
    <string name="min25">25</string>  
    <string name="min30">30</string> 
    <string name="min35">35</string>  
    <string name="min40">40</string>  
    <string name="min45">45</string> 
    <string name="min50">50</string>  
    <string name="min55">55</string>  
    <string name="min59">59</string>

Answer 1

通过除法和模数运算符计算小时和分钟值。检查可能的小时值是否大于23表示超过白天。格式化您的值以表示为24小时格式：

int minutes = 260;
int hours = minutes / 60;
int minutesInDisplay = minutes % 60;
if (hours > 23)
    hours = hours % 24;
String postfix = (hours < 12) ? "am" : "pm";
NumberFormat formatter = new DecimalFormat("00");
String display = formatter.format(hours) + ":"
        + formatter.format(minutesInDisplay);
System.out.println("24 hour formatted time: " + display + " " + postfix);

Answer 2

如你所知，一小时是60分钟。因此，您可以将分钟数除以60，从而为您提供小时数。

int x = 260;

int hours = x / 60;
int minutes = x % 60;

System.out.printf("%d minutes is %d hours and %d minutes%n", x, hours, minutes);

如果您还想要天数：

int x = 2270; // just an example

// 24 * 60 = 1440 minutes in a day
int days = x / 1440;

int minutesRestInDay = x % 1440;

int hours = minutesRestInDay / 60;
int minutes = minutesRestInDay % 60;

System.out.printf("%d minutes is %d days, %d hours and %d minutes%n",
    x, days, hours, minutes);

Answer 3

public String getTime(int minutes){
  String value = "";
  if(minutes<=0){
    return "minutes cannot be zero or negative";
  }
  int hr=minutes/60;
  int min=minutes%60;
  if(hr>23){
    hr = hr % 24;
  }
  return  hr+":"+min;


}

将分钟转换为24小时格式的android应用程序

3 个答案: