Question

我正在尝试使用Retrofit构建一个Muzei扩展，就像他在他的例子中使用的示例一样。

我无法真正理解Retrofit，不过这就是我所拥有的

ArtSource.java

public class ArtSource extends RemoteMuzeiArtSource {
    private static final String TAG = "The Muzei Collection";
    private static final String SOURCE_NAME = "The Muzei Collection";

    private static final int ROTATE_TIME_MILLIS = 3 * 60 * 60 * 1000; // rotate every 3 hours

    public ArtSource() {
        super(SOURCE_NAME);
    }

    @Override
    public void onCreate() {
        super.onCreate();
        setUserCommands(BUILTIN_COMMAND_ID_NEXT_ARTWORK);
    }

    @Override
    protected void onTryUpdate(int reason) throws RetryException {
        String currentToken = (getCurrentArtwork() != null) ? getCurrentArtwork().getToken() : null;

        RestAdapter restAdapter = new RestAdapter.Builder()
                .setServer("http://elliothesp.co.uk")
                .build();

        ArtService service = restAdapter.create(ArtService.class);
        PhotosResponse response = service.getPopularPhotos();

   if (response == null || response.photos == null) {
        throw new RetryException();
    }

    if (response.photos.size() == 0) {
        Log.w(TAG, "No photos returned from API.");
        scheduleUpdate(System.currentTimeMillis() + ROTATE_TIME_MILLIS);
        return;
    }

        Random random = new Random();
        Photo photo;
        String token;
        while (true) {
            photo = response.photos.get(random.nextInt(response.photos.size()));
            token = Integer.toString(photo.id);
            if (response.photos.size() <= 1 || !TextUtils.equals(token, currentToken)) {
                break;
            }
        }

        publishArtwork(new Artwork.Builder()
                .title(photo.title)
                .byline(photo.user)
                .imageUri(Uri.parse(photo.url))
                .token(token)
                .viewIntent(new Intent(Intent.ACTION_VIEW,
                        Uri.parse("http://www.google.com")))
                .build());

        scheduleUpdate(System.currentTimeMillis() + ROTATE_TIME_MILLIS);
    }
}

ArtService.java

interface ArtService {
    @GET("/muzei.php")
    PhotosResponse getPopularPhotos();

    static class PhotosResponse {
        List<Photo> photos;
    }

    static class Photo {
        int id;
        String user;
        String title;
        String url;

    }
}

基本上，我正在尝试从http://elliothesp.co.uk/muzei.php获取JSON并将每个项目传递给publishArtwork。它运行异常，因为它无法从JSON提要中找到任何照片，我不知道如何使其正常工作

Answer 1

JSON格式response不适合您的界面，应该是：

interface service {
    @GET("/muzei.php")
    Map<String,Photo> getPopularPhotos();

    static class Photo {
        int id;
        String user;
        String title;
        String url;

    }
}

response：

Map<String, Photo> response = service.getPopularPhotos();

然后在获得response迭代后重新编写代码

使用Retrofit获取JSON

1 个答案: