我是Android的新手，正在构建一个使用Retrofit库从REST API加载数据的应用程序。我以前设法使其工作，但是现在当我向POJO类中添加更多变量时，Retrofit似乎存在转换问题。转到“ OnFailure”，错误不是IOException类型。我认为Lecture对象列表可能有问题。
这是源JSON的示例：
[
{
"id":1603,
"date":"2018-09-11T22:12:59",
"date_gmt":"2018-09-11T20:12:59",
"guid":{
"rendered":"https:\/\/get-splashed.cz\/?p=1603"
},
"modified":"2018-09-11T22:22:01",
"modified_gmt":"2018-09-11T20:22:01",
"slug":"stein-and-meredith",
"status":"publish",
"type":"post",
"link":"https:\/\/get-splashed.cz\/speakers\/stein-and-meredith",
"title":{
"rendered":"Stein and Meredith"
},
"content":{
"rendered":"Animation and Games. Whatever your experience",
"protected":false
},
"excerpt":{
"rendered":"Head of Compositing",
"protected":false
},
"author":1,
"featured_media":1606,
"comment_status":"open",
"ping_status":"open",
"sticky":false,
"template":"",
"format":"standard",
"meta":[
],
"categories":[
2
],
"tags":[
],
"acf":{
"role":"",
"job":"<b>Escape Studios<\/b>",
"social":false,
"speaker_slider_shortcode":"[rev_slider alias=\"escape\"]",
"o_prednasce":[
{
"nazev_prednasky":"Creating a killer showreel: advice & tips for VFX, Animation & Games",
"den_prednasky":"nedele",
"cas_prednasky":"17:30",
"typ":"P\u0159edn\u00e1\u0161ka",
"misto_konani":"Main Hall",
"doba_trvani":"60",
"prave_probiha":""
}
]
}
},
{
"id":1452,
"date":"2018-08-13T22:41:19",
"date_gmt":"2018-08-13T20:41:19",
"guid":{
"rendered":"https:\/\/get-splashed.cz\/?p=1452"
},
"modified":"2018-08-14T11:27:11",
"modified_gmt":"2018-08-14T09:27:11",
"slug":"jan-jinda",
"status":"publish",
"type":"post",
"link":"https:\/\/get-splashed.cz\/speakers\/jan-jinda",
"title":{
"rendered":"Jan Jinda"
},
"content":{
"rendered":"<p>Czech born London based 3D Generalist",
"protected":false
},
"excerpt":{
"rendered":"Czech born London based",
"protected":false
},
"author":1,
"featured_media":1453,
"comment_status":"open",
"ping_status":"open",
"sticky":false,
"template":"",
"format":"standard",
"meta":[
],
"categories":[
2
],
"tags":[
],
"acf":{
"role":"Senior Build TD",
"job":"<b>Dneg<\/b>",
"social":[
{
"odkaz":"https:\/\/www.facebook.com\/jan.jinda",
"socialni_sit":"facebook"
},
{
"odkaz":"https:\/\/www.linkedin.com\/in\/janjinda\/",
"socialni_sit":"linkedin"
}
],
"speaker_slider_shortcode":"[rev_slider alias=\"jinda\"]",
"o_prednasce":[
{
"nazev_prednasky":"Building massive Jaegers for PR2",
"den_prednasky":"sobota",
"cas_prednasky":"15:00",
"typ":"P\u0159edn\u00e1\u0161ka",
"misto_konani":"Main Hall",
"doba_trvani":"60",
"prave_probiha":""
}
]
}
}
]
还有我的POJO课：
import com.google.gson.annotations.SerializedName;
import java.util.List;
public class Speaker {
@SerializedName("id")
private int mId;
@SerializedName("title")
private Title mTitle;
@SerializedName("acf")
private Acf mAcf;
@SerializedName("featured_media")
private int mMediaId;
@SerializedName("content")
private Content mContent;
String mImageUrl = "";
// indicator if the speaker is fake - zig-zag layout
private boolean mFakeSpeaker = false;
public Speaker(int id, Title title, Acf acf, int mediaId, String imageUrl, boolean fakeSpeaker) {
mId = id;
mTitle = title;
mAcf = acf;
mImageUrl = imageUrl;
mMediaId = mediaId;
mFakeSpeaker = fakeSpeaker;
}
public int getId() {
return mId;
}
public Title getTitle() {
return mTitle;
}
public Acf getAcf() {
return mAcf;
}
public int getMediaId() {
return mMediaId;
}
public String getImageUrl() {
return mImageUrl;
}
public void setImageUrl(String imageUrl) {
mImageUrl = imageUrl;
}
public boolean getIsFakeSpeaker() {
return mFakeSpeaker;
}
public void setIsFakeSpeaker(boolean isFakeSpeaker) {
mFakeSpeaker = isFakeSpeaker;
}
public Content getContent() {
return mContent;
}
public class Title {
@SerializedName("rendered")
private String mName;
public Title(String name) {
mName = name;
}
public String getName() {
return mName;
}
}
public class Acf {
@SerializedName("role")
private String mRole;
@SerializedName("job")
private String mCompany;
@SerializedName("o_prednasce")
private List<Lecture> mLectures;
public Acf(String role, String company, List<Lecture> lectures) {
mRole = role;
mCompany = company;
mLectures = lectures;
}
public String getRole() {
return mRole;
}
public String getCompany() {
return mCompany;
}
public List<Lecture> getLectures() {
return mLectures;
}
public class Lecture {
@SerializedName("nazev_prednasky")
private String mLectureName;
@SerializedName("den_prednasky")
private String mLectureDay;
@SerializedName("cas_prednasky")
private String mLectureTime;
public Lecture(String lectureName, String lectureDay, String lectureTime) {
mLectureName = lectureName;
mLectureDay = lectureDay;
mLectureTime = lectureTime;
}
public String getLectureName() {
return mLectureName;
}
public String getLectureDay() {
return mLectureDay;
}
public String getLectureTime() {
return mLectureTime;
}
}
}
public class Content {
@SerializedName("rendered")
private String mDescription;
public Content(String description) {
mDescription = description;
}
public String getDescription() {
return mDescription;
}
}
}
代码一直有效，直到我添加了Lecture类。现在我不知道这里可能是什么问题。
编辑：在翻新的onFailure方法中记录错误类型后：
public void onFailure(Call<List<Speaker>> call, Throwable t) {
if (t instanceof IOException) {
Log.v("RetrofitSplash", "No internet connection");
} else {
Log.v("RetrofitSplash", "conversion issue! " + t.getMessage());
}
}
我发现存在一个问题：“期望BEGIN_ARRAY但在第1行第46857列的路径BOOLEAN路径$ [10] .acf.o_prednasce”
然后我再次查看JSON，发现有一个字段“ acf.o_prednasce”，在某种情况下，不是数组，而是“ false”，即布尔值。
查看更大的JSON示例：
[
{
"id":1603,
"date":"2018-09-11T22:12:59",
"date_gmt":"2018-09-11T20:12:59",
"guid":{
"rendered":"https:\/\/get-splashed.cz\/?p=1603"
},
"modified":"2018-09-11T22:22:01",
"modified_gmt":"2018-09-11T20:22:01",
"slug":"stein-and-meredith",
"status":"publish",
"type":"post",
"link":"https:\/\/get-splashed.cz\/speakers\/stein-and-meredith",
"title":{
"rendered":"Stein and Meredith"
},
"content":{
"rendered":"Animation and Games. Whatever your experience",
"protected":false
},
"excerpt":{
"rendered":"Head of Compositing",
"protected":false
},
"author":1,
"featured_media":1606,
"comment_status":"open",
"ping_status":"open",
"sticky":false,
"template":"",
"format":"standard",
"meta":[
],
"categories":[
2
],
"tags":[
],
"acf":{
"role":"",
"job":"<b>Escape Studios<\/b>",
"social":false,
"speaker_slider_shortcode":"[rev_slider alias=\"escape\"]",
"o_prednasce":[
{
"nazev_prednasky":"Creating a killer showreel: advice & tips for VFX, Animation & Games",
"den_prednasky":"nedele",
"cas_prednasky":"17:30",
"typ":"P\u0159edn\u00e1\u0161ka",
"misto_konani":"Main Hall",
"doba_trvani":"60",
"prave_probiha":""
}
]
}
},
{
"id":1452,
"date":"2018-08-13T22:41:19",
"date_gmt":"2018-08-13T20:41:19",
"guid":{
"rendered":"https:\/\/get-splashed.cz\/?p=1452"
},
"modified":"2018-08-14T11:27:11",
"modified_gmt":"2018-08-14T09:27:11",
"slug":"jan-jinda",
"status":"publish",
"type":"post",
"link":"https:\/\/get-splashed.cz\/speakers\/jan-jinda",
"title":{
"rendered":"Jan Jinda"
},
"content":{
"rendered":"<p>Czech born London based 3D Generalist",
"protected":false
},
"excerpt":{
"rendered":"Czech born London based",
"protected":false
},
"author":1,
"featured_media":1453,
"comment_status":"open",
"ping_status":"open",
"sticky":false,
"template":"",
"format":"standard",
"meta":[
],
"categories":[
2
],
"tags":[
],
"acf":{
"role":"Senior Build TD",
"job":"<b>Dneg<\/b>",
"social":[
{
"odkaz":"https:\/\/www.facebook.com\/jan.jinda",
"socialni_sit":"facebook"
},
{
"odkaz":"https:\/\/www.linkedin.com\/in\/janjinda\/",
"socialni_sit":"linkedin"
}
],
"speaker_slider_shortcode":"[rev_slider alias=\"jinda\"]",
"o_prednasce":[
{
"nazev_prednasky":"Building massive Jaegers for PR2",
"den_prednasky":"sobota",
"cas_prednasky":"15:00",
"typ":"P\u0159edn\u00e1\u0161ka",
"misto_konani":"Main Hall",
"doba_trvani":"60",
"prave_probiha":""
}
]
}
},
{
"id":855,
"date":"2018-05-02T23:21:11",
"date_gmt":"2018-05-02T21:21:11",
"guid":{
"rendered":"http:\/\/get-splashed.cz\/?p=855"
},
"modified":"2018-09-14T22:15:38",
"modified_gmt":"2018-09-14T20:15:38",
"slug":"talk-info-will-be-soon",
"status":"publish",
"type":"post",
"link":"https:\/\/get-splashed.cz\/nezarazene\/talk-info-will-be-soon",
"title":{
"rendered":"Speaker soon"
},
"content":{
"rendered":"",
"protected":false
},
"excerpt":{
"rendered":"",
"protected":false
},
"author":1,
"featured_media":863,
"comment_status":"open",
"ping_status":"open",
"sticky":false,
"template":"",
"format":"standard",
"meta":[
],
"categories":[
1
],
"tags":[
],
"acf":{
"role":"",
"job":"",
"social":false,
"speaker_slider_shortcode":"",
"o_prednasce":false
}
}
]
答案 0 :(得分：0)
-----------------------------------com.example.Acf.java-----------------------------------
package com.example;
import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Acf {
@SerializedName("role")
@Expose
private String role;
@SerializedName("job")
@Expose
private String job;
@SerializedName("social")
@Expose
private List<Social> social = null;
@SerializedName("speaker_slider_shortcode")
@Expose
private String speakerSliderShortcode;
@SerializedName("o_prednasce")
@Expose
private List<OPrednasce> oPrednasce = null;
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
public String getJob() {
return job;
}
public void setJob(String job) {
this.job = job;
}
public List<Social> getSocial() {
return social;
}
public void setSocial(List<Social> social) {
this.social = social;
}
public String getSpeakerSliderShortcode() {
return speakerSliderShortcode;
}
public void setSpeakerSliderShortcode(String speakerSliderShortcode) {
this.speakerSliderShortcode = speakerSliderShortcode;
}
public List<OPrednasce> getOPrednasce() {
return oPrednasce;
}
public void setOPrednasce(List<OPrednasce> oPrednasce) {
this.oPrednasce = oPrednasce;
}
}
-----------------------------------com.example.Content.java-----------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Content {
@SerializedName("rendered")
@Expose
private String rendered;
@SerializedName("protected")
@Expose
private Boolean _protected;
public String getRendered() {
return rendered;
}
public void setRendered(String rendered) {
this.rendered = rendered;
}
public Boolean getProtected() {
return _protected;
}
public void setProtected(Boolean _protected) {
this._protected = _protected;
}
}
-----------------------------------com.example.Example.java-----------------------------------
package com.example;
import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Example {
@SerializedName("id")
@Expose
private Integer id;
@SerializedName("date")
@Expose
private String date;
@SerializedName("date_gmt")
@Expose
private String dateGmt;
@SerializedName("guid")
@Expose
private Guid guid;
@SerializedName("modified")
@Expose
private String modified;
@SerializedName("modified_gmt")
@Expose
private String modifiedGmt;
@SerializedName("slug")
@Expose
private String slug;
@SerializedName("status")
@Expose
private String status;
@SerializedName("type")
@Expose
private String type;
@SerializedName("link")
@Expose
private String link;
@SerializedName("title")
@Expose
private Title title;
@SerializedName("content")
@Expose
private Content content;
@SerializedName("excerpt")
@Expose
private Excerpt excerpt;
@SerializedName("author")
@Expose
private Integer author;
@SerializedName("featured_media")
@Expose
private Integer featuredMedia;
@SerializedName("comment_status")
@Expose
private String commentStatus;
@SerializedName("ping_status")
@Expose
private String pingStatus;
@SerializedName("sticky")
@Expose
private Boolean sticky;
@SerializedName("template")
@Expose
private String template;
@SerializedName("format")
@Expose
private String format;
@SerializedName("meta")
@Expose
private List<Object> meta = null;
@SerializedName("categories")
@Expose
private List<Integer> categories = null;
@SerializedName("tags")
@Expose
private List<Object> tags = null;
@SerializedName("acf")
@Expose
private Acf acf;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getDateGmt() {
return dateGmt;
}
public void setDateGmt(String dateGmt) {
this.dateGmt = dateGmt;
}
public Guid getGuid() {
return guid;
}
public void setGuid(Guid guid) {
this.guid = guid;
}
public String getModified() {
return modified;
}
public void setModified(String modified) {
this.modified = modified;
}
public String getModifiedGmt() {
return modifiedGmt;
}
public void setModifiedGmt(String modifiedGmt) {
this.modifiedGmt = modifiedGmt;
}
public String getSlug() {
return slug;
}
public void setSlug(String slug) {
this.slug = slug;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
public Title getTitle() {
return title;
}
public void setTitle(Title title) {
this.title = title;
}
public Content getContent() {
return content;
}
public void setContent(Content content) {
this.content = content;
}
public Excerpt getExcerpt() {
return excerpt;
}
public void setExcerpt(Excerpt excerpt) {
this.excerpt = excerpt;
}
public Integer getAuthor() {
return author;
}
public void setAuthor(Integer author) {
this.author = author;
}
public Integer getFeaturedMedia() {
return featuredMedia;
}
public void setFeaturedMedia(Integer featuredMedia) {
this.featuredMedia = featuredMedia;
}
public String getCommentStatus() {
return commentStatus;
}
public void setCommentStatus(String commentStatus) {
this.commentStatus = commentStatus;
}
public String getPingStatus() {
return pingStatus;
}
public void setPingStatus(String pingStatus) {
this.pingStatus = pingStatus;
}
public Boolean getSticky() {
return sticky;
}
public void setSticky(Boolean sticky) {
this.sticky = sticky;
}
public String getTemplate() {
return template;
}
public void setTemplate(String template) {
this.template = template;
}
public String getFormat() {
return format;
}
public void setFormat(String format) {
this.format = format;
}
public List<Object> getMeta() {
return meta;
}
public void setMeta(List<Object> meta) {
this.meta = meta;
}
public List<Integer> getCategories() {
return categories;
}
public void setCategories(List<Integer> categories) {
this.categories = categories;
}
public List<Object> getTags() {
return tags;
}
public void setTags(List<Object> tags) {
this.tags = tags;
}
public Acf getAcf() {
return acf;
}
public void setAcf(Acf acf) {
this.acf = acf;
}
}
-----------------------------------com.example.Excerpt.java-----------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Excerpt {
@SerializedName("rendered")
@Expose
private String rendered;
@SerializedName("protected")
@Expose
private Boolean _protected;
public String getRendered() {
return rendered;
}
public void setRendered(String rendered) {
this.rendered = rendered;
}
public Boolean getProtected() {
return _protected;
}
public void setProtected(Boolean _protected) {
this._protected = _protected;
}
}
-----------------------------------com.example.Guid.java-----------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Guid {
@SerializedName("rendered")
@Expose
private String rendered;
public String getRendered() {
return rendered;
}
public void setRendered(String rendered) {
this.rendered = rendered;
}
}
-----------------------------------com.example.OPrednasce.java-----------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class OPrednasce {
@SerializedName("nazev_prednasky")
@Expose
private String nazevPrednasky;
@SerializedName("den_prednasky")
@Expose
private String denPrednasky;
@SerializedName("cas_prednasky")
@Expose
private String casPrednasky;
@SerializedName("typ")
@Expose
private String typ;
@SerializedName("misto_konani")
@Expose
private String mistoKonani;
@SerializedName("doba_trvani")
@Expose
private String dobaTrvani;
@SerializedName("prave_probiha")
@Expose
private String praveProbiha;
public String getNazevPrednasky() {
return nazevPrednasky;
}
public void setNazevPrednasky(String nazevPrednasky) {
this.nazevPrednasky = nazevPrednasky;
}
public String getDenPrednasky() {
return denPrednasky;
}
public void setDenPrednasky(String denPrednasky) {
this.denPrednasky = denPrednasky;
}
public String getCasPrednasky() {
return casPrednasky;
}
public void setCasPrednasky(String casPrednasky) {
this.casPrednasky = casPrednasky;
}
public String getTyp() {
return typ;
}
public void setTyp(String typ) {
this.typ = typ;
}
public String getMistoKonani() {
return mistoKonani;
}
public void setMistoKonani(String mistoKonani) {
this.mistoKonani = mistoKonani;
}
public String getDobaTrvani() {
return dobaTrvani;
}
public void setDobaTrvani(String dobaTrvani) {
this.dobaTrvani = dobaTrvani;
}
public String getPraveProbiha() {
return praveProbiha;
}
public void setPraveProbiha(String praveProbiha) {
this.praveProbiha = praveProbiha;
}
}
-----------------------------------com.example.Social.java-----------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Social {
@SerializedName("odkaz")
@Expose
private String odkaz;
@SerializedName("socialni_sit")
@Expose
private String socialniSit;
public String getOdkaz() {
return odkaz;
}
public void setOdkaz(String odkaz) {
this.odkaz = odkaz;
}
public String getSocialniSit() {
return socialniSit;
}
public void setSocialniSit(String socialniSit) {
this.socialniSit = socialniSit;
}
}
-----------------------------------com.example.Title.java-----------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Title {
@SerializedName("rendered")
@Expose
private String rendered;
public String getRendered() {
return rendered;
}
public void setRendered(String rendered) {
this.rendered = rendered;
}
}
答案 1 :(得分：0)
序列化程序通常要求对象具有默认构造函数。
向Lecture添加默认构造函数，看看会发生什么。
答案 2 :(得分：0)
不需要默认的构造函数；就像那些@Expose注释一样。
尝试使用ArrayList<Lecture>而不是List<Lecture>。
答案 3 :(得分：0)
最后，我自己找到了解决方案：由于JSON中的字段“ acf.o_prednasce”在某种情况下是布尔值，在其他情况下是数组，因此我通过字段“ category”过滤了API响应以得到一个一个响应中该字段的类型。