How can I use the file chooser in Android to sort files by their suffixes?

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One way to use the file chooser in Android to sort files by their suffixes is by creating a CustomFilePickerDialog that extends the default FileChooserDialog and overrides its methods.

Here is an example:

1. Create a CustomFilePickerDialog class that extends the FileChooserDialog and overrides its onFileSelected method:

public class CustomFilePickerDialog extends FileChooserDialog {

   public CustomFilePickerDialog(Context context, File path) {
     super(context, path);
   }

   @Override
   protected void onFileSelected(File file) {
     if (file.isDirectory()) {
        setSelectedFile(file);
     } else {
        File[] files = getFileListAdapter().getFiles();
        Arrays.sort(files, new Comparator<File>() {
           @Override
           public int compare(File file1, File file2) {
              String suffix1 = file1.getName().substring(file1.getName().lastIndexOf(".") + 1);
              String suffix2 = file2.getName().substring(file2.getName().lastIndexOf(".") + 1);
              return suffix1.compareToIgnoreCase(suffix2);
           }
        });
        getFileListAdapter().setFiles(files);
        super.onFileSelected(file);
     }
   }
}

1. Use CustomFilePickerDialog in your activity:

CustomFilePickerDialog dialog = new CustomFilePickerDialog(this, initialDirectory);
dialog.show();

This will sort the files by their suffixes when a file is selected.