How to sort files using datetimestamp

Question

I am capturing images, then storing into SD Card and showing in a List, but here i need a small change, still

Answer 1

You can use the Collections.sort method in your list adapter to sort the values according to the image file name like:

Collections.sort(ImageList, new Comparator() {
  int compare(String obj1, String obj2) {
        return obj1.compareTo(obj2);
  }
});

compareTo method and also compareToIgnoreCase method, use wichever you think is appropriate, and also, you can experiment with obj1 and obj2, that is, you could swap the condition to:

 return obj2.compareTo(obj1);

That way your list will be sorted. Hope that helps!

EDIT:

Since you know that the format is _ and then -.jpg, what you can do is in the comparator split the value from - like:

Collections.sort(ImageList, new Comparator() {
  int compare(String obj1, String obj2) {
        String[] obj1Arr = obj1.split(-);
        String[] obj2Arr = obj2.split(-);

        obj1Arr = obj1Arr[1].split("."); // to just get the counter value
        obj2Arr = obj2Arr[1].split(".");

        return obj1Arr[0].compareTo(obj2Arr[0]);
  }
});