paging library not showing anything in recyclerview - android-recyclerview

Question

i'm trying to load bunch of list from room database, with paging library, but somehow that i don't really understand, the list never shown up
i add a repository class between dao and viewmodel, not sure if its the problem but, i configure Paged.list and pagedlistbuilder in there
i've also try to put some breakpoint in pagedListAdapter, but it never called
DAO
#Query("SELECT * FROM DictIndonesia")
public abstract DataSource.Factory<Integer, DictIndonesia> getAllPaged();
REPOSITORY
public class DictRepository {
PagedList.Config pagedListConfid;
.....
public DictRepository(Application application) {
db = DictIndoDatabase.getINSTANCE(application);
indDao = db.dictIdDao();
.....
pagedListConfid = (new PagedList.Config.Builder()
.setEnablePlaceholders(true)
.setPrefetchDistance(10)
.setPageSize(20).build());
}
......
public LiveData<PagedList<DictIndonesia>> getAllWordPaged() {
return new LivePagedListBuilder<>(
indDao.getAllPaged(), pagedListConfid).build();
}
viewmodel
public LiveData<PagedList<DictIndonesia>> getAllWordPaged() {
return dictRepository.getAllWordPaged();
}
ADAPTER
public class WordIndAdapterPaged extends PagedListAdapter<DictIndonesia,WordIndAdapterPaged.WordHolder> {
public WordIndAdapterPaged() {
super(diffcallBack);
}
#NonNull
#Override
public WordHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler, parent, false);
return new WordHolder(itemView);
}
#Override
public void onBindViewHolder(#NonNull WordHolder holder, int position) {
holder.bindTo(getItem(position));
}
private static final DiffUtil.ItemCallback<DictIndonesia> diffcallBack = new DiffUtil.ItemCallback<DictIndonesia>() {
#Override
public boolean areItemsTheSame(#NonNull DictIndonesia oldItem, #NonNull DictIndonesia newItem) {
return oldItem.getIdIndo() == newItem.getIdIndo();
}
#Override
public boolean areContentsTheSame(DictIndonesia oldItem, #NonNull DictIndonesia newItem) {
return oldItem == newItem;
}
};
public class WordHolder extends RecyclerView.ViewHolder {
...............
WordHolder(View view) {
super(view);
...............
}
void bindTo(DictIndonesia dictIndonesia) {
word.setText(Html.fromHtml(dictIndonesia.getWord()));
meaning.setText(Html.fromHtml(dictIndonesia.getMeaning()));
}
}
Fragment
public class Fdashboard extends Fragment {
#BindView(R.id.rv_global)
RecyclerView rvGlobal;
private Unbinder unbinder;
WordIndAdapterPaged wordIndAdapterPaged;
private WordViewModel wordViewModel;
public Fdashboard() { }
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_fdashboard, container, false);
unbinder = ButterKnife.bind(this, v);
wordViewModel = ViewModelProviders.of(getActivity()).get(WordViewModel.class);
wordIndAdapterPaged = new WordIndAdapterPaged();
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getActivity());
rvGlobal.setLayoutManager(layoutManager);
rvGlobal.setAdapter(wordIndAdapterPaged);
wordViewModel.getAllWordPaged().observe(this, dictIndonesias -> {
wordIndAdapterPaged.submitList(dictIndonesias); //i think the problem maybe around here
});
return v;
}