I'm new to android and building an app that loads data from REST API using Retrofit library. I managed to get it worked previously but now when I added some more variables to my POJO class, the Retrofit seems to have conversion issues. It goes to "OnFailure" and the error is not of type IOException. I think there might be problem with the list of Lecture objects.
This is the sample of source JSON:
[
{
"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":""
}
]
}
}
]
And my POJO class:
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;
}
}
}
The code worked until I added the Lecture class. Now I can not figure out what issue could be here.
EDIT: After loging the type of error in Retrofit's onFailure method:
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());
}
}
I found out there is an issue: "Expected BEGIN_ARRAY but was BOOLEAN at line 1 column 46857 path $[10].acf.o_prednasce"
And I looked to the JSON again and found out there is a field "acf.o_prednasce" that in one case instead of being array is "false" i.e. boolean.
See bigger sample of JSON:
[
{
"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
}
}
]
In the end I found the solution myself: as the field "acf.o_prednasce" in JSON was in one case a boolean and in the rest of cases an array, I filtered the API response by field "category" to get one type of this field in one response.