在Retrofit 2.0中检索JSON字段时出错

本文介绍了在Retrofit 2.0中检索JSON字段时出错的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有问题. 我正在使用Retrofit 2.0从我的Android应用程序调用我的api.一切正常，但是当我收到一个空字段时，出现此错误:

I have a problem. I'm using Retrofit 2.0 to make calls to my api from my Android app. All works fine, but when I'm receive a empty field I get this error:

期望BEGIN_OBJECT，但在行1列8599路径处为BEGIN_ARRAY $ .meta.pagination.links

Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 8599 path $.meta.pagination.links

问题出在链接字段上，有时不为空

The problem is with links field, that sometimes is not empty

"links": { "next": "www.example, }

但是当它为空时，会出现错误. 我的问题是，当链接字段为空时我该如何处理?

But when it's empty the error appears. My questions, How can i handle when the links field is empty?

这是我的全部答复:

{ "data": [ { ..... } ], "meta": { "pagination": { "total": 50, "count": 50, "per_page": 60, "current_page": 1, "total_pages": 1, "links": [] } } }

这是我的POJO类:

public class ListResponse<O> { @SerializedName("data") private List<O> lista; @SerializedName("meta") private Meta meta; public List<O> getLista() { return lista; } public String getNext() { return meta.getPagination().getLinks().getNext(); } public int getTotal() { return meta.getPagination().getTotal(); } public class Meta { @SerializedName("pagination") Pagination pagination; public Pagination getPagination(){ return pagination; } public class Pagination{ @SerializedName("total") int total; @SerializedName("count") int count; @SerializedName("per_page") int per_page; @SerializedName("current_page") int current_page; @SerializedName("total_pages") int total_pages; @SerializedName("links") Links links; public int getTotal() { return total; } public Links getLinks() { return links; } public class Links { @SerializedName("next") String next; public String getNext() { return next; } } } }

推荐答案

我建议 JsonDeserializer .可以在此处找到一些示例用法此处.

I would suggest JsonDeserializer. Some sample usage could be found here & here.