You shouldn't extend CursorLoader when using loaders.
In most case it will be enough to create CursorLoader next way:
```final String[] PROJECTION = new String[] {
				MangaMarksTable._ID,
				MangaMarksTable.TITLE,
				MangaMarksTable.AUTHOR,
				MangaMarksTable.CHAPTERS_READ
		};
		CursorLoader cursorLoader = new CursorLoader(getActivity());
		cursorLoader.setUri(MangaMarksProvider.CONTENT_URI_MANGA_MARKS_LIST);
		cursorLoader.setProjection(PROJECTION);```