在MVP拱中传递对象

Question

我使用MVP体系结构，我通过API获得信息。在MODEL LEVEL中，我有一个列表，我想将此列表传递到PRESENTER LEVEL中。

当我创建一个函数来解决此问题时，出现错误消息“ NULL ERROR”

这是我的代码：

package com.example.lenovo.myapplication.Model;

import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

import java.util.List;

public class CountryModel {

    private String City;
    private String Country;
    private String Degree;

    @SerializedName("posts")

    public String getCity() {
        return City;
    }

    public String getCountry() {
        return Country;
    }

    public String getDegree() {
        return Degree;
    }

    public void setCity(String city) {
        City = city;
    }

    public void setCountry(String country) {
        Country = country;
    }

    public void setDegree(String degree) {
        Degree = degree;
    }

    public class ResultModel {

        List<CountryModel> posts;

        public List<CountryModel> getCountryModels() {
            return posts;
        }

        public void setCountryModels(List<CountryModel> countryModels) {
            this.posts = countryModels;

        }
    }
}

接口方法

public CountryModel Get_Wather_Informations(int position);

型号代码

 connection.enqueue(new Callback<CountryModel.ResultModel>() {
        @Override
        public void onResponse(Call<CountryModel.ResultModel> call, Response<CountryModel.ResultModel> response) {


            countryModels = response.body().getCountryModels();

            for (int i = 0; i < countryModels.size(); i++) {

                CountryModel ye = new CountryModel();
                ye.setCountry(countryModels.get(i).getCountry());
                ye.setCity(countryModels.get(i).getCity());
                ye.setDegree(countryModels.get(i).getDegree());
                ARRAYS.add(ye);
                Log.e("array size ", String.valueOf(ARRAYS.size()));
              //  Log.e("Size", String.valueOf(arrayList.size()));


            }


 @Override
public CountryModel Get_Wather_Informations(int position) {
    return countryModels.get(position);
}

当我尝试从该列表（PRESENTER LAYER）中获取对象时，我得到的是空值！

CountryModel COUNTRY_OBJ = new CountryModel();
COUNTRY_OBJ = MODEL.Get_Wather_Informations(0);