Get files' name from [Upload/Save Files] action

Hello everyone,

Currently I am trying to get the selected file name but failed.
Here is how I am doing and I will point out the current situation.

The process is like below.
click button -> select multiple files locally (=don't upload at this moment)-> use custom function to get the files' name -> show the names

The custom function is as below:

List<dynamic>? getFilesname(List<FFUploadedFile>? uploadedLocalFiles) {
  /// MODIFY CODE ONLY BELOW THIS LINE

  // Return the files' name in a string list by the given uploadedLocalFiles.
  if (uploadedLocalFiles == null || uploadedLocalFiles.isEmpty) {
    return null;
  }
  List<List<dynamic>> fileNames = [];
  for (FFUploadedFile file in uploadedLocalFiles) {
    String fileName = file.name.toString();
    String fileType = file.name.toString().split('.').last;
    fileNames.add([fileName, fileType]);
  }
  return fileNames;

  /// MODIFY CODE ONLY ABOVE THIS LINE
}

Currently I am able to get the files' name BUT they are not the original name of the selected files.

For example, if I upload A.pdf, B.png, C.jpeg, what I got will be something like:

-169415713644000_0.pdf
-169415713644000_1.png
-169415713644000_2.jpeg

* The number before underscore changes every time.

Is there any way to get the original file name (A.pdf, B.png, C.jpeg)?