Question

我正在尝试使用Retrofit和RxJava进行服务调用。我正在使用Picasso 2.5.2从API调用上传图像。我正在显示图像，但我只获得单张图像。当我调试时，我的大小为20，但显示的是单个。对此的任何帮助都会很棒。

Adapter类：

public class PopularMoviesAdapter extends RecyclerView.Adapter<PopularMoviesAdapter.MoviesViewHolder> {

private final String TAG = PopularMoviesAdapter.class.getSimpleName();

private Context context;
private List<MoviesResponse> movieItems = new ArrayList<>();

public PopularMoviesAdapter(Context context, List<MoviesResponse> movieItems) {
    this.context = context;
    this.movieItems = movieItems;
}

@Override
public MoviesViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.movies_grid_item, parent, false);
    return new MoviesViewHolder(view);
}

@Override
public void onBindViewHolder(MoviesViewHolder holder, int position) {

    List<Movies> movies = movieItems.get(position).getResults();
    String imageUrl = IntentKeys.MOVIES_POSTER_ENDPOINT + movies.get(position).getPosterPath();
    Log.d(TAG, "Poster URL from the API call: " + imageUrl);
    Picasso.with(context).load(imageUrl).into(holder.imageView);
    Glide.with(context).load(imageUrl).into(holder.imageView);

}

@Override
public int getItemCount() {
    return movieItems.size();
}

class MoviesViewHolder extends RecyclerView.ViewHolder {

    ImageView imageView;

    public MoviesViewHolder(View itemView) {
        super(itemView);

        imageView = (ImageView) itemView.findViewById(R.id.movies_grid_item_image);
    }
}}

片段类：

    public class PopularMoviesFragment extends Fragment {

    private static final int COLUMN_COUNT = 2;
    private List<MoviesResponse> responses;
    private RecyclerView recyclerView;
    private PopularMoviesAdapter popularMoviesAdapter;
    private Subscription subscription;
    private MoviesService service = RetrofitManager.getMoviesClient().create(MoviesService.class);

    public PopularMoviesFragment() {
        responses = new ArrayList<>();
    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.fragment_popular_movies, container, false);

        RecyclerView.LayoutManager layoutManager = new GridLayoutManager(
                getActivity(),
                COLUMN_COUNT,
                LinearLayoutManager.VERTICAL,
                false);

        recyclerView = (RecyclerView) view.findViewById(R.id.popular_movies_recycler_view);
        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(layoutManager);

        recyclerView.addItemDecoration(new GridSpacingItemDecoration(COLUMN_COUNT, dpToPx(10), true));
        recyclerView.setItemAnimator(new DefaultItemAnimator());

        return view;
    }

    private int dpToPx(int dp) {
        Resources r = getResources();
        return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, r.getDisplayMetrics()));
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);
    }

    @Override
    public void onStart() {
        super.onStart();
        getMoviesSubscription();
    }

    private void getMoviesSubscription() {
        subscription = service.getPopularMovies(IntentKeys.POPULAR_MOVIES_API_KEY)
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(
                        new Action1<MoviesResponse>() {
                            @Override
                            public void call(MoviesResponse movies) {
                                responses.add(movies);
                            }
                        }, new Action1<Throwable>() {
                            @Override
                            public void call(Throwable throwable) {

                            }
                        }, new Action0() {
                            @Override
                            public void call() {
                                displayPosters();
                            }
                        }
                );
    }

    private void displayPosters() {
        popularMoviesAdapter = new PopularMoviesAdapter(getContext(), responses);
        recyclerView.setAdapter(popularMoviesAdapter);
        recyclerView.invalidate();
    }

    @Override
    public void onDestroyView() {
        super.onDestroyView();
        if (subscription != null && subscription.isUnsubscribed()) {
            subscription.unsubscribe();
        }
    }

}

最后布局：

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/movies_grid_item"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <ImageView
        android:id="@+id/movies_grid_item_image"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:adjustViewBounds="true"/>
</LinearLayout>

POJO：

  public class Movies implements Serializable {

    private String posterPath;
    private Boolean adult;
    private String overview;
    private String releaseDate;
    private List<Integer> genreIds = new ArrayList<Integer>();
    private Integer id;
    private String originalTitle;
    private String originalLanguage;
    private String title;
    private String backdropPath;
    private Float popularity;
    private Integer voteCount;
    private Boolean video;
    private Float voteAverage;

    // getters and setters ommitted and constructor
}


   public class MoviesResponse implements Serializable {
    private Integer page;
    private List<Movies> results = new ArrayList<Movies>();
    private Integer totalResults;
    private Integer totalPages;

    // getters and setters ommitted and constructor
}

谢谢！

Answer 1

尝试

Context context = holder.itemView.getContext();

在你的onBindViewHolder中

，这样你就不会传递上下文。

还可以尝试在片段中添加popularMoviesAdapter.notifyDataSetChanged()。你介意上传你的POJO吗？

适配器中的

public PopularMoviesAdapter(List<Movie> movies) {
    this.movies = movies;
}

片段中的

.subscribe(
                        new Action1<MoviesResponse>() {
                            @Override
                            public void call(MoviesResponse movies) {
                                responses.add(movies.getResults());
                                popularMoviesAdapter.notifyDataSetChanged()
                            }
                        }

更改

@Override
public void onBindViewHolder(MoviesViewHolder holder, int position) {

    List<Movies> movies = movieItems.get(position);
    String imageUrl = IntentKeys.MOVIES_POSTER_ENDPOINT + movies.get(position).getPosterPath();
    Log.d(TAG, "Poster URL from the API call: " + imageUrl);
    Picasso.with(context).load(imageUrl).into(holder.imageView);
    Glide.with(context).load(imageUrl).into(holder.imageView);

}

Answer 2

这是设置适配器的代码

popularMoviesAdapter = new PopularMoviesAdapter(getContext(), responses); recyclerView.setAdapter(popularMoviesAdapter);

你的 ArrayList的响应=新的ArrayList（） //这是你提供给适配器的arraylist

调试并检查响应的大小，我认为它将在一个对象上返回多少条记录我认为你的数组有点像这样

responses [{
    0,{

     } 
}];

所以传递

 popularMoviesAdapter = new PopularMoviesAdapter(getContext(), responses.get(0).getResults
); recyclerView.setAdapter(popularMoviesAdapter);

毕加索只加载单张图片但尺寸为20

2 个答案: