android - 阵列适配器不更新

Question

我有这个 ArrayAdapter:

public class PlacesAutoCompleteAdapter extends ArrayAdapter<String>  implements Filterable{

List<String> resultList;
private OnAutoCompleteListener listener;

private Context mContext;
private int mResource;


public PlacesAutoCompleteAdapter(Context context, int resource,List<String>resultList, OnAutoCompleteListener listener) {
    super(context, resource);

    mContext = context;
    mResource = resource;
    this.resultList = resultList;
    this.listener = listener;
}

@Override
public int getCount() {
    // Last item will be the footer
    return resultList.size();
}
public void updateList(List<String>values ){
    this.resultList = values;
    notifyDataSetChanged();
}

@Override
public String getItem(int position) {
    return resultList.get(position);
}

@Override
public Filter getFilter() {
    Filter filter = new Filter() {
        @Override
        protected FilterResults performFiltering(CharSequence constraint) {
            FilterResults filterResults = new FilterResults();
            if (constraint != null) {
                List<String> resultList = listener.onAutoComplete(constraint.toString());

                Log.d(getClass().getName(),String.valueOf(resultList.size()));
                filterResults.values = resultList;
                filterResults.count = resultList.size();
            }

            return filterResults;
        }

        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {
            if (results != null && results.count > 0) {
                notifyDataSetChanged();
            }
            else {
                notifyDataSetInvalidated();
            }
        }
    };

    return filter;
}
}

给出这个 Flowable 的结果:

    void addToList(Places places){
    places.getPredictions().stream().forEach(s->System.out.println(s.getDescription()));

    places.getPredictions()
            .stream()
            .map(s->resultList.add(s.getDescription()));
}

@Override
public List<String> loadPlaces(String input) {

    HappyParkApp.getInstance().createAppComponent().inject(this);

    PlaceAPIService service = retrofit.create(PlaceAPIService.class);

    Flowable<Places> places = service.getPlaces(Constants.APIKEY,Constants.TYPES,Constants.LANGUAGE,Constants.COMPONENTS,input);

    places.subscribeOn(Schedulers.newThread())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(newPlace -> addToList(newPlace));

    return resultList;
}
}

这是服务:

public interface PlaceAPIService {

@GET("json")
Flowable<Places> getPlaces(@Query("key")String API,
                             @Query("types")String address,
                             @Query("language")String language,
                             @Query("components")String component,
                             @Query("input") String input);

这是正确的，我可以查看日志以了解服务是否良好。 问题是显示适配器中项目的日志始终为 0。 为什么？ 我可以在哪里更新适配器？

谢谢

编辑:这是模型、 View 和演示者:

public class APIModel implements AddWithText.Model {

@Inject
Retrofit retrofit;

AddWithText.Presenter presenter;

public APIModel(AddWithText.Presenter presenter) {
    this.presenter = presenter;
}

final List<String> resultList = new ArrayList<>();

void addToList(Places places){
    places.getPredictions().stream().forEach(s->System.out.println(s.getDescription()));

    places.getPredictions()
            .stream()
            .map(s->resultList.add(s.getDescription()));
}

@Override
public List<String> loadPlaces(String input) {

    HappyParkApp.getInstance().createAppComponent().inject(this);

    PlaceAPIService service = retrofit.create(PlaceAPIService.class);

    Flowable<Places> places = service.getPlaces(Constants.APIKEY,Constants.TYPES,Constants.LANGUAGE,Constants.COMPONENTS,input);

    places.subscribeOn(Schedulers.newThread())
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(newPlace -> addToList(newPlace));

    return resultList;
}

public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState)
{
    // Inflate the layout for this fragment
    View rootView = inflater.inflate(R.layout.fragment_add_with_text, container, false);

    ButterKnife.bind(this,rootView);
    HappyParkApp.getInstance().createAppComponent().inject(this);

    presenter = new AddWithTextPresenter();

    adapter = new PlacesAutoCompleteAdapter(getActivity(),R.layout.list_item,autoComplete,this);
    DatabaseReference root = FirebaseDatabase.getInstance().getReference();
    final DatabaseReference condition = root.child("condition");

  insertText.setAdapter(adapter);


return rootView;
}


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

@Override
public List<String> onAutoComplete(String character) {
    List<String> result = presenter.onTextChanged(character);
    return result;
}

@Override
public void refreshList(List<String> resultList) {
    adapter.updateList(resultList);
}

public class AddWithTextPresenter implements AddWithText.Presenter {


AddWithText.View view;
AddWithText.Model model;


@Inject
public AddWithTextPresenter(){
    model = new APIModel(this);
}

@Override
public void onComplete(List<String> resultList) {
  view.refreshList(resultList);
}

@Override
public void setView(AddWithText.View view) {
    this.view = view;
}

@Override
public List<String> onTextChanged(String character) {
    return model.loadPlaces(character);

}

Answer 1

你错了

adapter = new PlacesAutoCompleteAdapter(getActivity(),R.layout.list_item,autoComplete,this);

在 Adapter 中你有 4 个参数，你只传递了 3 个。

第二次检查你在这里获取数据 -

@Override
public List<String> onAutoComplete(String character) {
    List<String> result = presenter.onTextChanged(character);
    return result;
}

如果是这样，那么您不会在任何地方将数据传递给适配器。在适配器中添加类似 setData() 的方法，然后将数据列表传递给它。添加以下方法

public List<String> getData() {
    return resultList;
}

public void setData(List<String> mData) {
    this.resultList = mData;
}

public void addItems(List<String> mData) {

    if (this.resultList != null) {
        this.resultList.addAll(mData);
        notifyItemInserted(this.resultList.size());
    }
}