Fetch all photo or specific folder images in android - java

FileManagerPhoto.java

    public void getFolderPhotosById(Context context, String folderId, WeakReference<FetchListener<List<GalleryItemModel>>> callback) {

        new Thread(() -> {

            List<GalleryItemModel> photos = new ArrayList<>();
            if (context == null) {
                if(callback.get() != null) callback.get().onFetch(photos);
                return;
            }

            Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
            String[] projection = {
                    MediaStore.MediaColumns.DATA,
                    MediaStore.Images.Media.DATE_TAKEN
            };

            boolean isAllPhoto = folderId.equals("-1");

            //if received -1 as id means to fetch all photo and set null
            //else set bucket id as folders id to fetch sub items
            //order by date token to get newest items
            Cursor cursor = context.getContentResolver().query(
                    uri,
                    projection,
                    isAllPhoto ? null : MediaStore.Images.Media.BUCKET_ID + " = ?",
                    isAllPhoto ? null : new String[]{folderId},
                    MediaStore.Images.ImageColumns.DATE_TAKEN + " DESC"
            );

            if (cursor != null) {

                final int COLUMN_DATA = cursor.getColumnIndex(MediaStore.MediaColumns.DATA);

                while (cursor.moveToNext()) {
                    try {
                        GalleryItemModel photo = new GalleryItemModel();
                        photo.setId(photos.size());
                        photo.setAddress(cursor.getString(COLUMN_DATA));
                        if (photo.getAddress() != null && !photo.getAddress().contains(".gif")) {
                            photos.add(photo);
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
                cursor.close();
            }
            if(callback.get() != null) callback.get().onFetch(photos);

        }).start();
    }