How to sort the dates from current to old date in Android or Java?

You can go with Comparator and can sort data by using compare()

Collections.sort(dateList, new Comparator<Date>(){
           public int compare(Date date1, Date date2){
          return date1.after(date2);
        }
      });

Try this:

 Comparator date_comparator = new Comparator() {
    @Override
    public int compare(Date date1, Date date2){
    return date1.compareTo(date2);
    }
    };