Retrofit article block example

retrofit-article-example.java

RuntimeTypeAdapterFactory<Block> articleBlockFactory = RuntimeTypeAdapterFactory.of(Block.class, "type")
  .registerSubtype(TextBlock.class, "text")
  .registerSubtype(ImageBlock.class, "image")
  .registerSubtype(VideoBlock.class, "video");

Gson gson = new GsonBuilder()
  .setDateFormat("yyyy-MM-dd'T'HH:mm:ssZ")
  .registerTypeAdapterFactory(AutoValueTypeAdapterFactory.create())
  .registerTypeAdapterFactory(articleBlockFactory)
  .create();

Retrofit retrofit = new Retrofit.Builder()
  .baseUrl("https://api.example.com/")
  .addConverterFactory(GsonConverterFactory.create(gson))
  .build();