我不熟悉 rx java。尝试将它与 recycleview 一起使用。出于某种原因，我的代码不起作用这是我的代码。
带有回收 View 的 fragment
public class CheeseListFragment extends Fragment {
private final CompositeSubscription subscriptions = new CompositeSubscription();
private PublishSubject<String> timespanSubject;
private final Func1<String, Observable<LiveInfo>> trendingSearch =
new Func1<String, Observable<LiveInfo>>() {
@Override
public Observable<LiveInfo> call(String s) {
RadioLiveInfoObservableService radioLiveInfoObservableService=ApiProvider.getInstance().getRadioObserverInfo();
return radioLiveInfoObservableService.radioInfo(Type.INTERVAL)
.observeOn(AndroidSchedulers.mainThread())
.doOnError(trendingError)
.onErrorResumeNext(Observable.<LiveInfo>empty());
}
};
private final Action1<Throwable> trendingError = new Action1<Throwable>() {
@Override public void call(Throwable throwable) {
Timber.e(throwable, "Failed to get trending repositories");
}
};
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
timespanSubject = PublishSubject.create();
final RecyclerView rv = (RecyclerView) inflater.inflate(
R.layout.fragment_cheese_list, container, false);
setupRecyclerView(rv);
subscriptions.add(timespanSubject
.flatMap(trendingSearch)
.map(SearchResultToRepositoryList.instance())
.subscribe(adapter));
return rv;
}
private SimpleStringRecyclerViewAdapter adapter;
private void setupRecyclerView(RecyclerView recyclerView) {
recyclerView.setLayoutManager(new LinearLayoutManager(recyclerView.getContext()));
adapter=new SimpleStringRecyclerViewAdapter(getActivity(), new SimpleStringRecyclerViewAdapter.CurrentShowClickListener() {
@Override
public void onCurrentShowClick(Current currentShow) {
Intent intent = new Intent(CApplication.getAppContext(), CheeseDetailActivity.class);
intent.putExtra(CheeseDetailActivity.EXTRA_NAME, currentShow.getName());
CApplication.getAppContext().startActivity(intent);
}
});
recyclerView.setAdapter(adapter);
adapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
@Override
public void onChanged() {
Toast.makeText(getActivity(),"data changed",Toast.LENGTH_SHORT).show();
}
});
}
private List<String> getRandomSublist(String[] array, int amount) {
ArrayList<String> list = new ArrayList<>(amount);
Random random = new Random();
while (list.size() < amount) {
list.add(array[random.nextInt(array.length)]);
}
return list;
}
public static class SimpleStringRecyclerViewAdapter
extends RecyclerView.Adapter<SimpleStringRecyclerViewAdapter.ViewHolder> implements Action1<List<Current>> {
private List<Current> currentShows = Collections.emptyList();
public interface CurrentShowClickListener {
void onCurrentShowClick(Current currentShow);
}
private final CurrentShowClickListener currentShowClickListener;
private final TypedValue mTypedValue = new TypedValue();
private int mBackground;
@Override
public void call(List<Current> currentShows) {
this.currentShows = currentShows;
notifyDataSetChanged();
}
public SimpleStringRecyclerViewAdapter(Context context,CurrentShowClickListener currentShowClickListener) {
context.getTheme().resolveAttribute(R.attr.selectableItemBackground, mTypedValue, true);
mBackground = mTypedValue.resourceId;
this.currentShowClickListener = currentShowClickListener;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
ListItemView view = (ListItemView)LayoutInflater.from(parent.getContext())
.inflate(R.layout.list_item, parent, false);
view.setBackgroundResource(mBackground);
return new ViewHolder(view);
}
@Override public void onBindViewHolder(ViewHolder viewHolder, int i) {
viewHolder.bindTo(currentShows.get(i));
}
@Override public long getItemId(int position) {
return position;
}
@Override public int getItemCount() {
return currentShows.size();
}
public final class ViewHolder extends RecyclerView.ViewHolder {
public final ListItemView itemView;
private Current currentShow;
public ViewHolder(ListItemView itemView) {
super(itemView);
this.itemView = itemView;
this.itemView.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View v) {
currentShowClickListener.onCurrentShowClick(currentShow);
}
});
}
public void bindTo(Current currentShow) {
this.currentShow = currentShow;
itemView.bindTo(currentShow);
}
}
}
}
SearchToResultRepositoryList
public final class SearchResultToRepositoryList implements Func1<LiveInfo, List<Current>> {
private static volatile SearchResultToRepositoryList instance;
public static SearchResultToRepositoryList instance() {
if (instance == null) {
instance = new SearchResultToRepositoryList();
}
return instance;
}
@Override public List<Current> call(LiveInfo repositoriesResponse) {
List<Current> currents=new ArrayList<>();
currents.add(repositoriesResponse.getCurrent());
return currents;
}
}
休息
public interface RadioLiveInfoObservableService {
@GET("/api/live-info/")
Observable<LiveInfo> radioInfo(
@Query("type") Type type);
}
它只是什么都不做。我试着调试它 trendingSearch.call 根本没有被调用。
我只能这样让它工作。但我仍然想知道如何订阅
RadioLiveInfoObservableService radioLiveInfoObservableService=ApiProvider.getInstance().getRadioObserverInfo();
radioLiveInfoObservableService.commits(Type.INTERVAL)
.observeOn(AndroidSchedulers.mainThread())
.doOnError(trendingError)
.onErrorResumeNext(Observable.<LiveInfo>empty()).subscribe(new Action1<LiveInfo>() {
@Override
public void call(LiveInfo liveInfo) {
List<Current> currents=new ArrayList<Current>();
currents.add(liveInfo.getCurrent());
adapter.currentShows=currents;
adapter.notifyDataSetChanged();
rv.setAdapter(adapter);
}
});
最佳答案
需要消化大量代码来查找错误，但在调用 timeSpanSubject.onNext() 之前，我的脑海里什么都不会发生。我在任何地方都看不到这个调用，但可能缺少一些您没有显示的代码。
如果没有缺少调用 timeSpanSubject.onNext() 的代码，那么您可以使用一个 BehaviorSubject，它会在第一次订阅时发出一个项目，或者使用另一个 Observable例如timer或 interval取决于你想做什么。 timer 会订阅您的 trendingSearch Observable 一次，而使用 interval 会订阅多次。
关于android - RXJava RecyclerView，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31566510/