反序列化来自 Wordpress API JSON 响应的嵌套 JSON 标签和附件

Question

我在 Android 应用程序中使用 Retrofit 2 与 WordPress API 通信，但我无法从帖子中获取附件和标签。

相应的 JSON 响应如下所示：

{

"ID": 1,
"site_ID": 1,
"author": {
},
"tags": {
    "Doom": {
        "ID": 654,
        "name": "Doom",
        "slug": "doom",
        "description": "",
        "post_count": 53
    },
    "Ego-Shooter": {
        "ID": 73,
        "name": "Ego-Shooter",
        "slug": "ego-shooter",
        "description": "",
        "post_count": 724
    },
    "id Software": {
        "ID": 127,
        "name": "id Software",
        "slug": "id-software",
        "description": "",
        "post_count": 41
    }
}
"attachments": {
    "54344": {
        "ID": 54344,
        "URL": "",
        "guid": "",
        "mime_type": "image/jpeg",
        "width": 843,
        "height": 499
    },
    "54345": {
        "ID": 54345,
        "URL": "",
        "guid": "",
        "mime_type": "image/jpeg",
        "width": 800,
        "height": 1600
    }
}

}

Post.class:

public class Post {

    @SerializedName("ID")
    private int ID;

    @SerializedName("title")
    private String title;

    @SerializedName("content")
    private String content;

    @SerializedName("featured_image")
    private String featuredImage;

    @SerializedName("date")
    private String date;

    @SerializedName("URL")
    private String URL;

    @SerializedName("author")
    private Author author;

    @SerializedName("discussion")
    private Discussion discussion;

    @SerializedName("attachments")
    private Attachment attachments; // At this point I have problems
}

Attachment.class

public class Attachment {

    @SerializedName("URL")
    private String URL;

    @SerializedName("width")
    private int width;

    @SerializedName("height")
    private int height;

}

除附件或标签中的嵌套 JSON 对象外，一切正常。 Attachment 对象仅包含默认值，未填充 JSON 响应中的正确值。

我的 Retrofit 构建器：

    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(WordPressService.ENDPOINT)
            .client(okHttpClient)
            .addConverterFactory(GsonConverterFactory.create())
            .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
            .build();
    return retrofit.create(WordPressService.class);

我想要一个附件对象列表，但我不知道如何解决这个问题。

Answer 1

要解析 attachments 和 tags JSON 元素，请使用 LinkedTreeMap.

更新 Post class 如下：

public class Post {

  @SerializedName("ID")
  private int ID;

  @SerializedName("title")
  private String title;

  @SerializedName("content")
  private String content;

  @SerializedName("featured_image")
  private String featuredImage;

  @SerializedName("date")
  private String date;

  @SerializedName("URL")
  private String URL;

  @SerializedName("tags")
  LinkedTreeMap<String, Tag> tags;

  @SerializedName("attachments")
  LinkedTreeMap<String, Attachment> attachments;
}

反序列化来自 Wordpress API JSON 响应的嵌套 JSON 标签和附件

Deserialize nested JSON tags and attachments from Wordpress API JSON response

wordpress

android

json

gson

retrofit2