Question

我正在使用Retrofit调用服务器并获取json响应。我得到的错误是：

Expected BEGIN_OBJECT but was BEGIN_ARRAY

这是我的代码

Main method,


public class MainActivity extends ListActivity {

    List<Movie> movieList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final RestAdapter restadapter = new RestAdapter.Builder().setEndpoint("http://api.themoviedb.org").build();

        api movieapi = restadapter.create(api.class);

        movieapi.getData(new Callback<List<Movie>>() {
            @Override
            public void success(List<Movie> movies, Response response) {
                movieList = movies;

                adapter adapt = new adapter(getApplicationContext(),R.layout.item_file,movieList);
                //ListView listView = (ListView) findViewById(R.id.list);
                setListAdapter(adapt);
            }

            @Override
            public void failure(RetrofitError error) {
                Toast.makeText(MainActivity.this, error.getMessage(), Toast.LENGTH_LONG).show();
            }
        });


    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

接口api

public interface api {

    @GET("/3/discover/movie?sort_by=popularity.desc&api_key=e2a804764747474747474574817b218e")
    public void getData(Callback<List<Movie>> response);

}

类适配器

public class adapter extends ArrayAdapter<Movie> {

    String url = "http://image.tmdb.org/t/p/w185";
    private Context context;
    private List<Movie> movieList;
    public adapter(Context context, int resource, List<Movie> objects) {
        super(context, resource, objects);
        this.context = context;
        this.movieList = objects;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.item_file,parent,false);
        Movie movie = movieList.get(position);
        TextView tv = (TextView) view.findViewById(R.id.name);
        tv.setText(movie.getTitle());
        ImageView img = (ImageView) view.findViewById(R.id.img);
        Picasso.with(getContext()).load(url+movie.getPoster_path()).into(img);
        return view;
    }
}

电影课（我在哪里处理json的getter setters）

   package com.wuno.moviesapp.model;


public class Movie
{
    private String vote_average;

    private String backdrop_path;

    private String adult;

    private String id;

    private String title;

    private String original_language;

    private String overview;

    private String[] genre_ids;

    private String original_title;

    private String release_date;

    private String vote_count;

    private String poster_path;

    private String video;

    private String popularity;

    public String getVote_average ()
    {
        return vote_average;
    }

    public void setVote_average (String vote_average)
    {
        this.vote_average = vote_average;
    }

    public String getBackdrop_path ()
    {
        return backdrop_path;
    }

    public void setBackdrop_path (String backdrop_path)
    {
        this.backdrop_path = backdrop_path;
    }

    public String getAdult ()
    {
        return adult;
    }

    public void setAdult (String adult)
    {
        this.adult = adult;
    }

    public String getId ()
    {
        return id;
    }

    public void setId (String id)
    {
        this.id = id;
    }

    public String getTitle ()
    {
        return title;
    }

    public void setTitle (String title)
    {
        this.title = title;
    }

    public String getOriginal_language ()
    {
        return original_language;
    }

    public void setOriginal_language (String original_language)
    {
        this.original_language = original_language;
    }

    public String getOverview ()
    {
        return overview;
    }

    public void setOverview (String overview)
    {
        this.overview = overview;
    }

    public String[] getGenre_ids ()
    {
        return genre_ids;
    }

    public void setGenre_ids (String[] genre_ids)
    {
        this.genre_ids = genre_ids;
    }

    public String getOriginal_title ()
    {
        return original_title;
    }

    public void setOriginal_title (String original_title)
    {
        this.original_title = original_title;
    }

    public String getRelease_date ()
    {
        return release_date;
    }

    public void setRelease_date (String release_date)
    {
        this.release_date = release_date;
    }

    public String getVote_count ()
    {
        return vote_count;
    }

    public void setVote_count (String vote_count)
    {
        this.vote_count = vote_count;
    }

    public String getPoster_path ()
    {
        return poster_path;
    }

    public void setPoster_path (String poster_path)
    {
        this.poster_path = poster_path;
    }

    public String getVideo ()
    {
        return video;
    }

    public void setVideo (String video)
    {
        this.video = video;
    }

    public String getPopularity ()
    {
        return popularity;
    }

    public void setPopularity (String popularity)
    {
        this.popularity = popularity;
    }

    @Override
    public String toString()
    {
        return "Movie [vote_average = "+vote_average+", backdrop_path = "+backdrop_path+", adult = "+adult+", id = "+id+", title = "+title+", original_language = "+original_language+", overview = "+overview+", genre_ids = "+genre_ids+", original_title = "+original_title+", release_date = "+release_date+", vote_count = "+vote_count+", poster_path = "+poster_path+", video = "+video+", popularity = "+popularity+"]";
    }
}

Answer 1

Retrofit尝试将结果解析为您指定的类型，而这不是返回的类型。您指定的列表是返回的对象的成员。

您应该为响应创建一个对象：

public class MoviesResponse {

     private int page;
     private List<Movie> results;
     private int total_pages;
     private int total_results;

}

更改回调：

@GET("/3/discover/movie?sort_by=popularity.desc&api_key=your_api_key")
public void getData(Callback<MoviesResponse> response);

改造 - 预计BEGIN_OBJECT但是BEGIN_ARRAY错误

1 个答案: