Android: how to get a directory list ordered by name or by date descending?

Question

I\'m able to do this:

    File images = new File(path);  
    File[] imageList = images.listFiles(new FilenameFilter(){  
        public boolean accept(File          


        

Answer 1

The right way to order files by date of last modified in reverse mode is doing:

Arrays.sort(Files, LastModifiedFileComparator.LASTMODIFIED_REVERSE); 

for this instruction you will need the commons.io library from org.apache that you can download from here

Answer 2

For sort based on file name,Add

object1.getName().toLowerCase(Locale.getDefault())

instead of

object1.getName()

to avoid sort issues causing by Locale changes and upper/low case filenames

             final File[] sortedFileName = images.listFiles();

                if (sortedFileName != null && sortedFileName.length > 1) {
                    Arrays.sort(sortedFileName, new Comparator<File>() {
                        @Override
                        public int compare(File object1, File object2) {
                            return object1.getName().toLowerCase(Locale.getDefault()).compareTo(object2.getName().toLowerCase(Locale.getDefault()));
                        }
                    });
                }

Answer 3

If you prefer brevity:

File[] files = folder.listFiles();
Arrays.sort(files, (a, b) -> Long.compare(b.lastModified(), a.lastModified()));