response.issuccessfull（）为false

Question

帮帮我.我正在为我的项目使用改型，我是完全新的。我得到以下错误。为什么我会得到错误的回应？

2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: Response
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: 
Response{protocol=http/1.1, code=402, message=Payment Required, 
url=https://quizziyapa.herokuapp.com/getTopics}
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: Payment Required
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: okhttp3.ResponseBody$1@647c751
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: null
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: false
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: retrofit2.OkHttpCall$NoContentResponseBody@4f0bbb6
[Error][1]

JSON结构

这是我的json结构。

{
    "topics": [
        {
            "_id": 2,
            "topic": "abc",
            "imageUrl": "abc12345"
        },
        {
            "_id": 3,
            "topic": "abc",
            "imageUrl": "abc12345"
        }
    ]
}

public class Topic {
    int _id;
    String topic;
    String imageUrl;

    public Topic(int _id, String topic, String imageUrl) {
        this._id = _id;
        this.topic = topic;
        this.imageUrl = imageUrl;
    }

    public int getId() {
        return _id;
    }

    public String getTopic() {
        return topic;
    }

    public String getImageUrl() {
        return imageUrl;
    }
}

public class TopicResponse {
    @SerializedName("topics")
    Topic[] topics;

    public TopicResponse(Topic[] topics) {
        this.topics = topics;
    }

    public Topic[] getTopics() {
        return topics;
    }
}

public interface IUserApi {
    @GET("getTopics")
    Call<TopicResponse> getTop();
}

Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("https://quizziyapa.herokuapp.com/")
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        IUserApi api =  retrofit.create(IUserApi.class);
        Call<TopicResponse> call= api.getTop();
        call.enqueue(new Callback<TopicResponse>() {
            @Override
            public void onResponse(Call<TopicResponse> call, Response<TopicResponse> response) {
                Log.d("Ayush", "Response");
                Log.d("Ayush", String.valueOf(response));
                Log.d("Ayush", String.valueOf(response.message()));
                Log.d("Ayush", String.valueOf(response.errorBody()));
                Log.d("Ayush", String.valueOf(response.body()));
                Log.d("Ayush", String.valueOf(response.isSuccessful()));
                Log.d("Ayush", String.valueOf(response.raw().body()));
            }

            @Override
            public void onFailure(Call<TopicResponse> call, Throwable t) {
                Log.d("Ayush", "Failed \n"+t.getMessage());
            }
        });

帮我解决这个问题该怎么做？

Answer 1

根据MDN Web文档

所需的HTTP 402支付是一个非标准的客户机错误状态响应代码，为将来使用保留。

由于retfit在状态代码200后面跟随成功，所以在您的情况下响应正文为NULL。