RecyclerView Load More Call from activity

MainActivity.java

public class MainActivity extends AppCompatActivity {
    ...

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    ...
    
        adapter = new MoviesAdapter(this, movies);
        adapter.setLoadMoreListener(new MoviesAdapter.OnLoadMoreListener() {
            @Override
            public void onLoadMore() {

                recyclerView.post(new Runnable() {
                    @Override
                    public void run() {
                        int index = movies.size() - 1;
                        loadMore(index);// a method which requests remote data 
                    }
                });
                //Calling loadMore function in Runnable to fix the
                // java.lang.IllegalStateException: Cannot call this method while RecyclerView is computing a layout or scrolling error
            }
        });

        recyclerView.setAdapter(adapter);
    }
    
   private void loadMore(int index){

        //add loading progress view
        movies.add(new MovieModel("load"));
        adapter.notifyItemInserted(movies.size()-1);

        Call<List<MovieModel>> call = api.getMovies(index);
        call.enqueue(new Callback<List<MovieModel>>() {
            @Override
            public void onResponse(Call<List<MovieModel>> call, Response<List<MovieModel>> response) {
                if(response.isSuccessful()){

                    //remove loading view
                    movies.remove(movies.size()-1);

                    List<MovieModel> result = response.body();
                    if(result.size()>0){
                        //add loaded data
                        movies.addAll(result);
                    }else{//result size 0 means there is no more data available at server
                        adapter.setMoreDataAvailable(false);
                        //telling adapter to stop calling load more as no more server data available
                        Toast.makeText(context,"No More Data Available",Toast.LENGTH_LONG).show();
                    }
                    adapter.notifyDataChanged();
                    //should call the custom method adapter.notifyDataChanged here to get the correct loading status
                }else{
                    Log.e(TAG," Load More Response Error "+String.valueOf(response.code()));
                }
            }

            @Override
            public void onFailure(Call<List<MovieModel>> call, Throwable t) {
                Log.e(TAG," Load More Response Error "+t.getMessage());
            }
        });
    }
}