獲取倒序的文件或文件夾存儲在SD卡中的Android

Question

我想從最後降序到第一的文件夾和文件降序。但我不想從lastmodify（）方法獲得。因爲如果我從任何文件夾中刪除文件。該文件夾數據首先獲取。這是我的模型類。

public class CallRecord implements Comparable<CallRecord>{ 

public String name; 
public String time; 
public String callType; 
public String number; 
public String filePath; 
public String fileDuration; 
public String folderName; 
public String photoUri; 
public boolean isStatic=false; 


public String getPhotoUri() { 
    return photoUri; 
} 

public void setPhotoUri(String photoUri) { 
    this.photoUri = photoUri; 
} 

public String getFolderName() { 
    return folderName; 
} 

public void setFolderName(String folderName) { 
    this.folderName = folderName; 
} 

public boolean isStatic() { 
    return isStatic; 
} 

public void setStatic(boolean aStatic) { 
    isStatic = aStatic; 
} 

public String getName() { 
    return name; 
} 

public void setName(String name) { 
    this.name = name; 
} 

public String getTime() { 
    return time; 
} 

public void setTime(String time) { 
    this.time = time; 
} 

public String getCallType() { 
    return callType; 
} 

public void setCallType(String callType) { 
    this.callType = callType; 
} 

public String getNumber() { 
    return number; 
} 

public void setNumber(String number) { 
    this.number = number; 
} 

public String getFilePath() { 
    return filePath; 
} 

public void setFilePath(String filePath) { 
    this.filePath = filePath; 
} 

public String getFileDuration() { 
    return fileDuration; 
} 

public void setFileDuration(String fileDuration) { 
    this.fileDuration = fileDuration; 
} 

@Override 
public int compareTo(CallRecord callRecord) { 

    Long date1 = Long.valueOf(this.getTime().substring(1, 5)); 
    Long date2 = Long.valueOf(callRecord.getTime().substring(1, 5)); 
    return (date2>date1 ? -1 : (date2==date1 ? 0 : 1)); 
} 

}

Answer 1

這是解決方案，從去年獲得的文件夾，以相反的順序第一手段。 此代碼適用於我

Arrays.sort(filesList, new Comparator<File>() { 
      @Override 
      public int compare(File object1, File object2) { 


       Date date=null,date1=null; 
       String dateString=object1.getName(); 
       String dateString1=object2.getName(); 

       dateString=dateString.replace("-","/"); 

       dateString1=dateString1.replace("-","/"); 


       SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd"); 
       try { 
        date = sdf.parse(dateString); 
        date1=sdf.parse(dateString1); 
       } catch (ParseException e) { 
        e.printStackTrace(); 
       } 

       Long dat =date.getTime(); 
       Long dat2 = date1.getTime(); 


       if (dat > dat2) { 
        return -1; 
       } else if (dat < dat2) { 
        return +1; 
       } else { 
        return 0; 
       } 

      } 
     }); 

Answer 2

檢查該如何排序

//這裏PhonebookContactModel是模型類

//排序名稱順序Z - A

//要排序改變訂單，比較中更改對象。

Collections.sort(mArrayContactList, new Comparator() { 
      @Override 
      public int compare(Object o1, Object o2) { 
       PhonebookContactModel p1 = (PhonebookContactModel) o1; 
       PhonebookContactModel p2 = (PhonebookContactModel) o2; 
       return p2.getName().compareToIgnoreCase(p1.getName()); 
      } 
     });