如何使用改造 2 在 Android 中获取 Json，如下面的代码所示？
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【中文标题】如何使用改造 2 在 Android 中获取 Json，如下面的代码所示？【英文标题】：How to fetch Json in Android using retrofit 2 as shown in below code? 【发布时间】：2019-03-26 05:27:12 【问题描述】：api 网址：“http://btownmedia.com/?json=get_category_posts&slug=flex-print&status=publish”
我的json如下所示：
"status": "ok",
"count": 1,
"pages": 1,
"category":
"id": 44,
"slug": "flex-print",
"title": "Flex Print",
"description": "Flex Print",
"parent": 7,
"post_count": 1
,
"posts": [
"id": 343,
"type": "post",
"slug": "nk-advertising",
"url": "https://btownmedia.com/2018/10/10/nk-advertising/",
"status": "publish",
"title": "NK Advertising",
"title_plain": "NK Advertising",
"content": "<p style=\"color: #7a6666; font-family: roboto-regular-webfont; font-size: 14px; line-height: 24px; margin: 0px; padding: 0px 0px 19px; width: 370px;\"><strong>Online advertisement:</strong> <em>Online advertisement on our website</em> means our basic service. Your business card or a visiting card sized advertisement is displayed on our website for pre-mentioned time frame.</p>\n<p style=\"color: #7a6666; font-family: roboto-regular-webfont; font-size: 14px; line-height: 24px; margin: 0px; padding: 0px 0px 19px; width: 370px;\"><strong>Personalized page:</strong> We offer you a personalized page, designed for your business with all the details of your business- linked with your advertisement that opens when clicked.</p>\n",
"excerpt": "<p>Online advertisement on our website means our basic service. Your business card or a visiting card sized advertisement is displayed on our website for pre-mentioned time frame.</p>\n",
"date": "2018-10-10 08:08:29",
"modified": "2018-10-10 08:08:29",
"categories": [
"id": 44,
"slug": "flex-print",
"title": "Flex Print",
"description": "Flex Print",
"parent": 7,
"post_count": 1
],
"tags": [],
"author":
"id": 1,
"slug": "admin",
"name": "admin",
"first_name": "",
"last_name": "",
"nickname": "admin",
"url": "",
"description": ""
,
"comments": [],
"attachments": [
"id": 342,
"url": "https://btownmedia.com/nk/",
"slug": "nk",
"title": "nk",
"description": "",
"caption": "",
"parent": 343,
"mime_type": "image/png",
"images":
"full":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"thumbnail":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"medium":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"medium_large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpggallery_admin_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpggallery_admin_large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpg_gallery_admin_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"rpg_gallery_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"estore-featured-image":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-product-grid":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-75x75.png",
"width": 75,
"height": 75
,
"estore-square":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-slider":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-medium-image":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
],
"comment_count": 0,
"comment_status": "open",
"thumbnail": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"custom_fields": ,
"thumbnail_size": "thumbnail",
"thumbnail_images":
"full":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"thumbnail":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"medium":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"medium_large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpggallery_admin_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpggallery_admin_large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpg_gallery_admin_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"rpg_gallery_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"estore-featured-image":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-product-grid":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-75x75.png",
"width": 75,
"height": 75
,
"estore-square":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-slider":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-medium-image":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
]
Pojo 类：
公开课帖子
private Integer id;
private String type;
private String slug;
private String url;
private String status;
private String title;
private String titlePlain;
private String content;
private String excerpt;
private String date;
private String modified;
private List<Object> tags = null;
private List<Object> comments = null;
private Integer commentCount;
private String commentStatus;
private String thumbnail;
private String thumbnailSize;
public Integer getId()
return id;
public void setId(Integer id)
this.id = id;
public String getType()
return type;
public void setType(String type)
this.type = type;
public String getSlug()
return slug;
public void setSlug(String slug)
this.slug = slug;
public String getUrl()
return url;
public void setUrl(String url)
this.url = url;
public String getStatus()
return status;
public void setStatus(String status)
this.status = status;
public String getTitle()
return title;
public void setTitle(String title)
this.title = title;
public String getTitlePlain()
return titlePlain;
public void setTitlePlain(String titlePlain)
this.titlePlain = titlePlain;
public String getContent()
return content;
public void setContent(String content)
this.content = content;
public String getExcerpt()
return excerpt;
public void setExcerpt(String excerpt)
this.excerpt = excerpt;
public String getDate()
return date;
public void setDate(String date)
this.date = date;
public String getModified()
return modified;
public void setModified(String modified)
this.modified = modified;
public List<Object> getTags()
return tags;
public void setTags(List<Object> tags)
this.tags = tags;
public List<Object> getComments()
return comments;
public void setComments(List<Object> comments)
this.comments = comments;
public Integer getCommentCount()
return commentCount;
public void setCommentCount(Integer commentCount)
this.commentCount = commentCount;
public String getCommentStatus()
return commentStatus;
public void setCommentStatus(String commentStatus)
this.commentStatus = commentStatus;
public String getThumbnail()
return thumbnail;
public void setThumbnail(String thumbnail)
this.thumbnail = thumbnail;
public String getThumbnailSize()
return thumbnailSize;
public void setThumbnailSize(String thumbnailSize)
this.thumbnailSize = thumbnailSize;
接口API
@GET("json=get_category_posts&slug=flex-print&status=publish")
Call<Post> getListPost();
MainActivity.java
void getListPosts()
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(url1)
.addConverterFactory(GsonConverterFactory.create())
.build();
RetrofitArrayAPI service = retrofit.create(RetrofitArrayAPI.class);
Log.d("service", String.valueOf(""));
Call<Post> call = service.getListPost();
call.enqueue(new Callback<Post>()
@Override
public void onResponse(Response<Post> response, Retrofit retrofit)
try
Log.d("Title", String.valueOf(response.body()));
catch (Exception e)
Log.d("onResponse", "There is an error");
e.printStackTrace();
@Override
public void onFailure(Throwable t)
Log.d("onFailure", t.toString());
);
如何在 json 中获取“posts”数组？我已经尝试过如上面的程序所示。 谁能帮帮我。在上面的程序中，我只想获取android中的posts数组。
"posts": [
"id": 343,
"type": "post",
"slug": "nk-advertising",
"url": "https://btownmedia.com/2018/10/10/nk-advertising/",
"status": "publish",
"title": "NK Advertising",
"title_plain": "NK Advertising",
"content": "<p style=\"color: #7a6666; font-family: roboto-regular-webfont; font-size: 14px; line-height: 24px; margin: 0px; padding: 0px 0px 19px; width: 370px;\"><strong>Online advertisement:</strong> <em>Online advertisement on our website</em> means our basic service. Your business card or a visiting card sized advertisement is displayed on our website for pre-mentioned time frame.</p>\n<p style=\"color: #7a6666; font-family: roboto-regular-webfont; font-size: 14px; line-height: 24px; margin: 0px; padding: 0px 0px 19px; width: 370px;\"><strong>Personalized page:</strong> We offer you a personalized page, designed for your business with all the details of your business- linked with your advertisement that opens when clicked.</p>\n",
"excerpt": "<p>Online advertisement on our website means our basic service. Your business card or a visiting card sized advertisement is displayed on our website for pre-mentioned time frame.</p>\n",
"date": "2018-10-10 08:08:29",
"modified": "2018-10-10 08:08:29",
"categories": [
"id": 44,
"slug": "flex-print",
"title": "Flex Print",
"description": "Flex Print",
"parent": 7,
"post_count": 1
],
"tags": [],
"author":
"id": 1,
"slug": "admin",
"name": "admin",
"first_name": "",
"last_name": "",
"nickname": "admin",
"url": "",
"description": ""
,
"comments": [],
"attachments": [
"id": 342,
"url": "https://btownmedia.com/nk/",
"slug": "nk",
"title": "nk",
"description": "",
"caption": "",
"parent": 343,
"mime_type": "image/png",
"images":
"full":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"thumbnail":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"medium":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"medium_large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpggallery_admin_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpggallery_admin_large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpg_gallery_admin_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"rpg_gallery_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"estore-featured-image":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-product-grid":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-75x75.png",
"width": 75,
"height": 75
,
"estore-square":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-slider":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-medium-image":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
],
"comment_count": 0,
"comment_status": "open",
"thumbnail": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"custom_fields": ,
"thumbnail_size": "thumbnail",
"thumbnail_images":
"full":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"thumbnail":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"medium":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"medium_large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpggallery_admin_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpggallery_admin_large":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"rpg_gallery_admin_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"rpg_gallery_thumb":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-150x142.png",
"width": 150,
"height": 142
,
"estore-featured-image":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-product-grid":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk-75x75.png",
"width": 75,
"height": 75
,
"estore-square":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-slider":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
,
"estore-medium-image":
"url": "https://btownmedia.com/wp-content/uploads/2018/10/nk.png",
"width": 230,
"height": 142
]
【问题讨论】：
您的 JSON 格式似乎有误，这将使 ant 解析器难以完成工作，请先修复 JSON。 【参考方案1】：最简单的解决方案是为您的 api 返回的整个对象创建一个上层类，然后从中获取您的帖子？
类似：
class APIResponse
public List<Post> posts;
// add the other fields from your response if you need them
那么你只需要用
替换你的电话@GET("json=get_category_posts&slug=flex-print&status=publish")
Call<APIResponse> getListPost();
然后您就可以轻松访问帖子列表，例如response.posts
但是，如果您不想拥有上层阶级而是直接拥有帖子列表，则可能需要使用自定义反序列化器。像这样的：
public static class PostAdapter implements JsonDeserializer<List<Post>>
public List<Post> deserialize(JsonElement jsonElement, Type typeOfT, JsonDeserializationContext ctx)
JsonObject json = jsonElement.getAsJsonObject();
List<Post> vals = new ArrayList<>();
if (json.has("posts") && .json.get("posts").isJsonArray())
for (JsonElement e : json.get("posts").getAsJsonArray())
vals.add((Post) ctx.deserialize(e, Post.class));
return vals;
您可以在创建改造服务时注册到您的 gson 构建器：
Type postListType = new TypeToken<List<Post>>() .getType();
Gson gson = new GsonBuilder()
.registerTypeAdapter(postListType, new PostAdapter())
.create();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(url1)
.addConverterFactory(GsonConverterFactory.create(gson))
.build();
通过这样做，每次您在 interfaceAPI 中声明一个 Call> 时，它将使用此适配器来获得正确的结果。所以现在你可以做
@GET("json=get_category_posts&slug=flex-print&status=publish")
Call<List<Post>> getListPost();
【讨论】：
【参考方案2】：Post.java
public class Post
private Integer id;
private String type;
private String slug;
private String url;
private String status;
private String title;
private String titlePlain;
private String content;
private String excerpt;
private String thumbnail;
public Integer getId()
return id;
public void setId(Integer id)
this.id = id;
public String getType()
return type;
public void setType(String type)
this.type = type;
public String getSlug()
return slug;
public void setSlug(String slug)
this.slug = slug;
public String getUrl()
return url;
public void setUrl(String url)
this.url = url;
public String getStatus()
return status;
public void setStatus(String status)
this.status = status;
public String getTitle()
return title;
public void setTitle(String title)
this.title = title;
public String getTitlePlain()
return titlePlain;
public void setTitlePlain(String titlePlain)
this.titlePlain = titlePlain;
public String getContent()
return content;
public void setContent(String content)
this.content = content;
public String getExcerpt()
return excerpt;
public void setExcerpt(String excerpt)
this.excerpt = excerpt;
public String getThumbnail()
return thumbnail;
public void setThumbnail(String thumbnail)
this.thumbnail = thumbnail;
PostArtical.java
public class PostArtical
private String status;
private Integer count;
private Integer pages;
private Category category;
private List<Post> posts = null;
public String getStatus()
return status;
public void setStatus(String status)
this.status = status;
public Integer getCount()
return count;
public void setCount(Integer count)
this.count = count;
public Integer getPages()
return pages;
public void setPages(Integer pages)
this.pages = pages;
public Category getCategory()
return category;
public void setCategory(Category category)
this.category = category;
public List<Post> getPosts()
return posts;
public void setPosts(List<Post> posts)
this.posts = posts;
Category.java
public class Category
private Integer id;
private String slug;
private String title;
private String description;
private Integer parent;
private Integer postCount;
public Integer getId()
return id;
public void setId(Integer id)
this.id = id;
public String getSlug()
return slug;
public void setSlug(String slug)
this.slug = slug;
public String getTitle()
return title;
public void setTitle(String title)
this.title = title;
public String getDescription()
return description;
public void setDescription(String description)
this.description = description;
public Integer getParent()
return parent;
public void setParent(Integer parent)
this.parent = parent;
public Integer getPostCount()
return postCount;
public void setPostCount(Integer postCount)
this.postCount = postCount;
MainActivity.java
//onCreate方法内部
onCreate method
getRetrofitPostObject();
//在onCreate方法之外
void getRetrofitPostObject()
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(urlp)
.addConverterFactory(GsonConverterFactory.create())
.build();
RetrofitObjectAPI service = retrofit.create(RetrofitObjectAPI.class);
Call<PostArtical> call = service.getPostDetails();
call.enqueue(new Callback<PostArtical>()
@Override
public void onResponse(Response<PostArtical> response, Retrofit retrofit)
try
Log.d("Category", response.body().getCategory().getTitle());
Log.d("PostText", response.body().getPosts().get(0).getTitle());
List<Post> PostData = response.body().getPosts();
for (int i = 0; i < PostData.size(); i++)
if (i == 0)
text_id_1.setText("id : " + PostData.get(i).getId());
Log.d("Atrical[0]", String.valueOf(PostData.get(i).getId()));
Log.d("Atrical[title]", String.valueOf(PostData.get(i).getTitle()));
Log.d("Atrical[content]", String.valueOf(PostData.get(i).getContent()).replaceAll("(<[^>]+>)|(&[^;]+;)",""));
Log.d("Atrical[Excerpt]", String.valueOf(PostData.get(i).getExcerpt()).replaceAll("(<[^>]+>)|(&[^;]+;)",""));
Log.d("Atrical[image]", String.valueOf(PostData.get(i).getThumbnail()));
img = PostData.get(i).getThumbnail();
DownloadImageWithURLTask downloadTask = new DownloadImageWithURLTask(imageview);
downloadTask.execute(img);
// text_name_1.setText("title : " + StudentData.get(i).getTitle());
// text_id_1.setText("PostStatus : " + response.body().getStatus());
text_name_1.setText("PostCount : " + response.body().getCount());
text_marks_1.setText("PostPage : " + response.body().getPages());
catch (Exception e)
Log.d("onResponse", "There is an error");
e.printStackTrace();
@Override
public void onFailure(Throwable t)
Log.d("onFailure", t.toString());
);
【讨论】：
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