ボタンをクリックしてもAndroidリサイクラービューが更新されない

テキスト、ボタン、およびリサイクラービューを編集しているところに、このフラグメントがあります。初めてボタンをクリックしたときの動作は期待どおりですが、テキストの編集コンテンツを変更してボタンをもう一度クリックしても、リサイクラービューは更新されません。何が悪いのですか？クリックごとにAPI呼び出しを行うプロセスを繰り返すので

断片

public class SearchFragment extends Fragment implements View.OnClickListener {

    private RestaurantAdapter mAdapter;
    private RecyclerView mRecyclerView;
    protected static List<Restaurant_> restaurantsList;
    private Context context;
    private static OnRestaurantClickedListener listener;
    private FirebaseAuth mAuth;

    private EditText keyword;

    private FusedLocationProviderClient mFusedLocationClient;


    public SearchFragment() {
    }

    public static OnRestaurantClickedListener getListener() {
        return listener;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        context = getContext();
        mAuth = FirebaseAuth.getInstance();
        restaurantsList = new ArrayList<>();
        mAdapter = new RestaurantAdapter(context, restaurantsList, getActivity());
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View mContentView = inflater.inflate(R.layout.fragment_search, container, false);
        mRecyclerView = mContentView.findViewById(R.id.recycler_view);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(mContentView.getContext()));
        mRecyclerView.setAdapter(mAdapter);

        keyword = mContentView.findViewById(R.id.keyword);
        keyword.setOnEditorActionListener(new TextView.OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView textView, int actionId, KeyEvent keyEvent) {
                if ((keyEvent != null && keyEvent.getKeyCode() == KeyEvent.KEYCODE_ENTER) || (actionId == EditorInfo.IME_ACTION_SEARCH))
                    getRestaurants();
                return false;
            }
        });

        ImageButton searchButton = mContentView.findViewById(R.id.search);
        searchButton.setOnClickListener(this);

        return mContentView;
    }

    @Override
    public void onResume() {
        super.onResume();
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            listener = (OnRestaurantClickedListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString() + " must implement OnButtonClicked");
        }
    }

    @SuppressLint("MissingPermission")
    private void getRestaurants() {
        mFusedLocationClient = LocationServices.getFusedLocationProviderClient(getActivity());
        mFusedLocationClient.getLastLocation().addOnSuccessListener(getActivity(), new OnSuccessListener<Location>() {
            @Override
            public void onSuccess(final Location location) {
                if (location != null) {
                    SharedPreferences mSettings = PreferenceManager.getDefaultSharedPreferences(context);
                    String sort = mSettings.getString("sort", "rating");
                    String order = mSettings.getString("order", "desc");
                    double radius = Double.parseDouble(mSettings.getString("radius", "10"));
                    radius = radius * 1000;
                    RetrofitZomato.getApi().searchByName(keyword.getText().toString(), location.getLatitude(), location.getLongitude(),
                            20, radius, sort, order, getActivity().getResources().getString(R.string.user_key))
                            .enqueue(new Callback<SearchResponse>() {
                                @Override
                                public void onResponse(Call<SearchResponse> call, Response<SearchResponse> response) {
                                    if (restaurantsList.size() != 0) {
                                        restaurantsList.clear();
                                        mAdapter.notifyDataSetChanged();
                                    }
                                    List<Restaurant> restaurants = response.body().getRestaurants();
                                    for (int i = 0; i < restaurants.size(); i++) {
                                        double distance = calculateDistance(Double.parseDouble(restaurants.get(i).getRestaurant().getLocation().getLatitude()),
                                                Double.parseDouble(restaurants.get(i).getRestaurant().getLocation().getLongitude()),
                                                location.getLatitude(), location.getLongitude());
                                        distance = (double) Math.round(distance * 100d) / 100d;
                                        restaurants.get(i).getRestaurant().setDistance(distance);
                                        restaurantsList.add(restaurants.get(i).getRestaurant());
                                        mAdapter.notifyItemInserted(i);
                                    }
                                }

                                @Override
                                public void onFailure(Call<SearchResponse> call, Throwable t) {
                                    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
                                    builder.setMessage("Couldn't find any nearby restaurants");
                                    AlertDialog mDialog = builder.create();
                                    mDialog.show();
                                }
                            });
                }
            }
        }).addOnFailureListener(getActivity(), new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Toast.makeText(getActivity(), "It wasn't possible to determine your location", Toast.LENGTH_LONG).show();
            }
        });
    }

    private double calculateDistance(double latRestaurant, double lonRestaurant, double myLat, double myLon) {
        if ((myLat == latRestaurant) && (myLon == lonRestaurant)) {
            return 0;
        } else {
            double theta = myLon - lonRestaurant;
            double dist = Math.sin(Math.toRadians(myLat)) * Math.sin(Math.toRadians(latRestaurant))
                    + Math.cos(Math.toRadians(myLat)) * Math.cos(Math.toRadians(latRestaurant)) * Math.cos(Math.toRadians(theta));
            dist = Math.acos(dist);
            dist = Math.toDegrees(dist);
            dist = dist * 60 * 1.1515;
            dist = dist * 1.609344;
            return dist;
        }
    }

    @Override
    public void onClick(View view) {
        int id = view.getId();
        if (id == R.id.search) {
            getRestaurants();
        }
    }
//    @Override
//    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
//        super.onActivityCreated(savedInstanceState);
//        searchViewModel = ViewModelProviders.of(this).get(SearchViewModel.class);
//        // TODO: Use the ViewModel
//    }

}