Android：如何根據日期對列表項目進行排序

Question

我有一個列表視圖，其中包含許多列表項目，其中包含日期。我想通過日期對項目進行排序，例如日期在當前日期之後的項目應該是第一個項目，而日期已過期的項目應該在該日期之後。任何人都可以幫忙

Answer 1

您可以使用自己比較像

Collections.sort(yourList, new Comparator<YourObjectInYourList>() { 
    public int compare(YourObjectInYourList o1, YourObjectInYourList o2) { 
     if (o1.getDate() == null || o2.getDate() == null) 
     return 0; 
     return o1.getDate().compareTo(o2.getDate()); 
    } 
}); 

Answer 2

List<Date> dateList = new ArrayList<Date>();   
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy",Locale.US);  
try { 
    dateList.add(sdf.parse("01/12/2013")); 
    dateList.add(sdf.parse("02/11/2013")); 
    dateList.add(sdf.parse("03/12/2013")); 
    dateList.add(sdf.parse("04/10/2013")); 
    dateList.add(sdf.parse("05/12/2013")); 
    dateList.add(sdf.parse("06/12/2013"));  
    dateList.add(new Date()); 

    Collections.sort(dateList); 
    Comparator<Date> cmp = new Comparator<Date>() { 

     @Override 
     public int compare(Date o1, Date o2) { 
     if(o1.getTime() > o2.getTime()) return 1; 
     else if(o1.getTime() < o2.getTime()) return -1; 
     else return 0; 
     }    
    }; 

    Collator collator = Collator.getInstance(); 
    List<Date> out_of_date_list = new ArrayList<Date>(); 
    for(Date date : dateList){ 
     System.out.println(">>> date = "+sdf.format(date)); 
     System.out.println(">>> out of date "+cmp.compare(new Date(), date)); 
      if(cmp.compare(date,new Date())<0){ 
       out_of_date_list.add(date); 
      }   
    } 
    System.out.println(">>> print all out of date ");   
    for(Date date : out_of_date_list){ 
     System.out.println(">>> date = "+sdf.format(date));  
    }    
} catch (ParseException e) {// TODO Auto-generated catch block 
    e.printStackTrace();   
}