The respons from the retrofit call is too slow and it returns a null list : public class RequestClass {

    private static final String TAG = RequestClass.class.getSimpleName();
    private final static String API_KEY = "apikey";
    static ApiInterface apiService =
            ApiClient.getClient().create(ApiInterface.class);

    static public List<Movie> getTopMovies(String page) {
        final List<Movie> lowDetailMovies = new ArrayList<Movie>();
        Call<MoviesResponse> call = apiService.getTopRatedMovies(API_KEY, page);
        call.enqueue(new Callback<MoviesResponse>() {
            @Override
            public void onResponse(Call<MoviesResponse> call, Response<MoviesResponse> response) {
                List<DBMovie> movies = response.body().getResults();

                for (DBMovie movie : movies) {
                    String[] genres = new String[6];
                    int i = 0;
                    for (int gen : movie.getGenreIds())
                        genres[i++] = gen + "";
                    lowDetailMovies.add(new Movie(movie.getId(), Double.toString(movie.getVote_average()), movie.getTitle(), movie.getTitle(), movie.getPoster_path(), movie.getOriginal_language(),
                            movie.getOriginal_title(), genres, movie.getOverview(), movie.getRelease_date(), false, false));
                }
            }

            @Override
            public void onFailure(Call<MoviesResponse> call, Throwable t) {
                Log.e(TAG, t.toString());
            }
        });


        return lowDetailMovies;
    }
    
    
}

Anyone can help me with a solution to get the list after onRespons method.
The duration of the onRespons method has about 400 ms.
This is the part of the  code where I need the list:


    @OnClick(R.id.popular_button)
    public void showPopularMovies(View view) {
        List<Movie> movies;

        movies = RequestClass.getTopMovies("1");

        Intent intent = new Intent(MainActivity.this, VODActivity.class);
        Collections.sort(movies, Util.compareByPopularityAscending);

        Bundle bundle = new Bundle();
        bundle.putSerializable(Constants.bundleMovieKey, (Serializable) movies);
        bundle.putString(Constants.bundleVodActivityTitle, Constants.PopularMoviesTitle);
        intent.putExtras(bundle);

        startActivity(intent);
    }

Thanks.