How to sort array by date modified in Android

Question

Use I am using sketchware IDE. How can I sort the the list by date or time modified.

I used this code

Arrays.sort(list, new Comparator<File>(){ 
 @Override public int compare(File file1, File file2)
  { 
      long k = file1.lastModified() - file2.lastModified();
       if(k > 0)
       { return 1; }
       else 
       if(k == 0)
       { return 0; }
       else
       { return -1; 
           } 
           }
            }
            );

But I get an error:

The method sort(T[], Comparator<? super T>) in the type Arrays is not applicable for the arguments (ArrayList<String>, new Comparator<File>(){})

Please post the code in which you populate `list` array. – Shlomi Katriel Mar 21 '21 at 06:46 — Shlomi Katriel, Mar 21 '21 at 06:46
Use `Collections.sort` instead of `Arrays.sort`. – Mark Rotteveel Mar 21 '21 at 08:10 — Mark Rotteveel, Mar 21 '21 at 08:10

score 0 · Answer 1 · answered Mar 21 '21 at 06:48

0

Arrays.sort() doesn't seem to accept a List.

So if you want to use Arrays.sort(), you should first convert the list to an array, like this:

File[] filesArray = new File[files.size()];
filesArray = files.toArray(filesArray);

Then call the function with the filesArray variable.

answered Mar 21 '21 at 06:48

Most Noble Rabbit

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Got error again – Extreme_Krish Mar 21 '21 at 07:19
Note that I used "files", instead of "list". Could that be the problem? Can you share the code? – Most Noble Rabbit Mar 21 '21 at 07:25

How to sort array by date modified in Android

1 Answers1