在具有不同数量项的适配器中组合Retrofit2和JSON

{
  "id": 1,
  "name": "John Doe",
  "items": [
    {
      "id": 1,
      "name": "Item 1"
    },
    {
      "id": 2,
      "name": "Item 2"
    }
  ]
}

public class User {
    private int id;
    private String name;
    private List<Item> items;

    // Getters and setters
}

public class Item {
    private int id;
    private String name;

    // Getters and setters
}

public interface ApiService {
    @GET("user/{id}")
    Call<User> getUser(@Path("id") int userId);
}

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

ApiService apiService = retrofit.create(ApiService.class);
Call<User> call = apiService.getUser(1);
call.enqueue(new Callback<User>() {
    @Override
    public void onResponse(Call<User> call, Response<User> response) {
        if (response.isSuccessful()) {
            User user = response.body();
            // 处理用户数据
        } else {
            // 处理错误
        }
    }

    @Override
    public void onFailure(Call<User> call, Throwable t) {
        // 处理失败
    }
});