Android - Searchview can only do one search only

Question

I made a movie search feature with searchview. when I do the first search, then the data or list will appear, but when I want to search again with a new search word and then I submit, the next data or list does not appear and only displays the previous data. there is not even a reaction to finding the next data. when I go out and return to the fragment, the search will go on as before, is there a solution to this? thank you

MovieSearchFragment

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_search_movie, container, false);

    recyclerView = view.findViewById(R.id.recyclerView);
    searchView = view.findViewById(R.id.searchView);
    searchView.setOnQueryTextListener(this);

    setupRecyclerView();

    return view;
}    

private void loadMovie(String search) {

    search = searchView.getQuery().toString();

    SearchMovieViewModel viewModel = ViewModelProviders.of(Objects.requireNonNull(getActivity())).get(SearchMovieViewModel.class);
    viewModel.init(search);
    viewModel.getSeacrhMovie().observe(this, new Observer<MovieResponse>() {
        @Override
        public void onChanged(MovieResponse movieResponse) {
            if (movieResponse != null) {
                List<Movie> movies = movieResponse.getResults();
                searchMovieList.addAll(movies);
                adapter.notifyDataSetChanged();
                showLoading(false);
            } else {
                showLoading(false);
                showError();
            }
        }
    });
}

@Override
public boolean onQueryTextSubmit(String query) {
    showLoading(true);
    loadMovie(query);
    return false;
}

@Override
public boolean onQueryTextChange(String s) {
    return false;
}

private void setupRecyclerView() {
    if (adapter == null) {
        adapter = new MovieAdapter(getActivity(), searchMovieList);
        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        recyclerView.setAdapter(adapter);
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setNestedScrollingEnabled(true);
    }
}

Viewmodel

public class SearchMovieViewModel extends ViewModel {
    private MutableLiveData<MovieResponse> mutableLiveData;

    public void init(String movieTitle) {
        if (mutableLiveData != null) {
            return;
        }

        Repository repository = Repository.getInstance();
        mutableLiveData = repository.getSearchMovie(BuildConfig.API_KEY, movieTitle);
    }

    public MutableLiveData<MovieResponse> getSeacrhMovie() {
       return mutableLiveData;
    }
}

Repository

public MutableLiveData<MovieResponse> getSearchMovie(String apiKey, String movieTitle) {
    final MutableLiveData<MovieResponse> searchData = new MutableLiveData<>();
    api.getSearchMovie(BuildConfig.API_KEY, movieTitle).enqueue(new Callback<MovieResponse>() {
        @Override
        public void onResponse(Call<MovieResponse> call, Response<MovieResponse> response) {
            if (response.isSuccessful()) {
                searchData.setValue(response.body());
            } else {
                searchData.setValue(null);
            }
        }

        @Override
        public void onFailure(Call<MovieResponse> call, Throwable t) {
            searchData.setValue(null);
        }
    });
    return searchData;
}

Answer 1

SOLVED

I found the problem in my repository and then I replaced it with LiveData and added postValue as the recipient of the new value. Besides, I tried to put the adapter in my observer and changed a bit to the setupRecyclerView method. until finally the search feature can run properly, thanks for those who have helped

MovieFragment

  @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_search_movie, container, false);

    progressBar = view.findViewById(R.id.progressBar);
    recyclerView = view.findViewById(R.id.recyclerView);
    searchView = view.findViewById(R.id.searchView);
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String query) {
            showLoading(true);
            loadMovie(query);
            return false;
        }

        @Override
        public boolean onQueryTextChange(String newText) {
            return false;
        }
    });

    setupRecyclerView();

    return view;
}

private void loadMovie(String title) {
    title = searchView.getQuery().toString();

    SearchMovieViewModel viewModel = ViewModelProviders.of(this).get(SearchMovieViewModel.class);
    viewModel.init(title);
    viewModel.getSearchMovie().observe(this, new Observer<MovieResponse>() {
        @Override
        public void onChanged(MovieResponse movieResponse) {
            if (movieResponse != null) {
                List<Movie> movieList = movieResponse.getResults();
                adapter = new MovieAdapter(getActivity(), movieList);
                recyclerView.setAdapter(adapter);
                adapter.notifyDataSetChanged();
                showLoading(false);
            } else {
                showLoading(false);
                showError();
            }
        }
    });
}

private void setupRecyclerView() {
    recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
    recyclerView.setItemAnimator(new DefaultItemAnimator());
    recyclerView.setNestedScrollingEnabled(true);
}

ViewModel

public class SearchMovieViewModel extends ViewModel {
private LiveData<MovieResponse> movieLiveData;

public void init(String movieTitle) {
    Repository repository = Repository.getInstance();
    movieLiveData = repository.getSearchMovie(BuildConfig.API_KEY, movieTitle);
}

public LiveData<MovieResponse> getSearchMovie() {
    return movieLiveData;
}
}

Repository

  public LiveData<MovieResponse> getSearchMovie(String apiKey, String movieTitle) {
    final MutableLiveData<MovieResponse> searchData = new MutableLiveData<>();
    api.getSearchMovie(BuildConfig.API_KEY, movieTitle).enqueue(new Callback<MovieResponse>() {
        @Override
        public void onResponse(Call<MovieResponse> call, Response<MovieResponse> response) {
            if (response.isSuccessful()) {
                searchData.postValue(response.body());
                searchData.setValue(response.body());
            } else {
                searchData.setValue(null);
            }
        }

        @Override
        public void onFailure(Call<MovieResponse> call, Throwable t) {
            searchData.setValue(null);
        }
    });
    return searchData;
}