Querying Android ContentResolver for gallery files and determining image vs video

I'm trying to make a simple Android app for my own phone that looks at my Gallery, and for each image/video file:

• creates a Bitmap thumbnail of the file
• records the file's absolute path on the phone

Essentially, I'll have the following data model:

public class MediaFileModel {

  private Bitmap thumbnail;
  private String absPath;

  // ctor, getters and setters omitted for brevity
  
}

And I need something that looks at all the files in my Gallery and yields a List<MediaFileModel>. My best attempt is here:

public List<MediaFileModel> getAllGalleryMedia() {

  String[] projection = { MediaStore.MediaColumns.DATA };
  List<MediaFileModel> galleryMedia = new ArrayList<>();
  Cursor cursor = getActivity().getContentResolver().query(
    MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
    projection,
    null,
    null,
    null);

  // I believe here I'm iterating over all the gallery files (???)
  while(cursor.moveToNext()) {
    MediaFileModel next = new MediaFileModel();

    // is this how I get the abs path of the current file?!?
    String absPath = cursor.getString(cursor.getColumnIndex(MediaStore.MediaColumns.DATA));

    Bitmap thumbnail = null;
    if (true /* ??? cursor is pointing to a media file that is an image/photo ??? */) {
      thumbnail = ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(absPath), 64, 64);
    } else {
      // else we have a video (I assume???)
      thumbnail = ThumbnailUtils.createVideoThumbnail(absPath, MediaStore.Images.Thumbnails.MINI_KIND);
    }

    next.setThumbnail(thumbnail);
    next.setAbsPath(absPath);

    galleryMedia.add(next);
    
  }

  return galleryMedia;
  
}

However I'm not sure if my media query is setup correctly and I'm definitely not sure how to determine whether the file is an image/photo of a video, which I (believe I) need so that I can use the correct method for obtaining the thumbnail Bitmap.

Can anyone help nudge me over the finish line here?

from Querying Android ContentResolver for gallery files and determining image vs video