Using Retrofit to access JSON arrays

Question

I thought I understood how to do this, but obviously not. I have my API from Flickr, which begins like so:

jsonFlickrApi({
   \"photos\":{
      \"page\":1,         


        

Answer 1

The accepted answer is correct but it requires building a PhotoResponse class which only has one object in it. This the following solution, we only need to create the Photos class and some sterilization.

We create a JsonDeserializer:

class PhotosDeserializer implements JsonDeserializer
{
    @Override
    public Photos deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {

        JsonElement content = json.getAsJsonObject().get("photos");

        return new Gson().fromJson(content, Photos.class);

    }

}

Now we create our custom gson object to Retrofit's RestAdapter:

    Gson gson = new GsonBuilder()
                    .registerTypeAdapter(Photos.class, new PhotosDeserializer())
                    .create();

And then we set the converter in the retrofit adapter:

 RestAdapter restAdapter = new RestAdapter.Builder()
                                            .setEndpoint(ArtService.ENDPOINT)
                                            .setConverter(new GsonConverter(gson))
                                            .build();

And the interface would look like this:

@GET("/?method="+METHOD_GET_RECENT+"&api_key="+API_KEY+"&format=json&nojsoncallback=1&extras="+EXTRAS_URL)
public void getPhotos(Callback response);

This way we get the Photos object without having to create PhotosResponse class. We can use it like this:

ArtService artService = restAdapter.create(ArtService.class);
artService.getPhotos(new Callback() {
    @Override
    public void success(Photos photos, Response response) {

        // Array of photos accessing by photos.photo

   }

   @Override
   public void failure(RetrofitError error) {


    }
});