Get nested JSON object with GSON using retrofit

Question

I\'m consuming an API from my android app, and all the JSON responses are like this:

{
    \'status\': \'OK\',
    \'reason\': \'Everything was fine\',
    \         


        

Answer 1

Continuing Brian's idea, because we almost always have many REST resources each with it's own root, it could be useful to generalize deserialization:

 class RestDeserializer implements JsonDeserializer {

    private Class mClass;
    private String mKey;

    public RestDeserializer(Class targetClass, String key) {
        mClass = targetClass;
        mKey = key;
    }

    @Override
    public T deserialize(JsonElement je, Type type, JsonDeserializationContext jdc)
            throws JsonParseException {
        JsonElement content = je.getAsJsonObject().get(mKey);
        return new Gson().fromJson(content, mClass);

    }
}

Then to parse sample payload from above, we can register GSON deserializer:

Gson gson = new GsonBuilder()
    .registerTypeAdapter(Content.class, new RestDeserializer<>(Content.class, "content"))
    .build();