add object into GSON array android studio

add object into GSON array android studio - android

hey guys im using android's gson library to parse my JSON. everything is working fine in that I have that selected goal array sometimes it is full of values and sometimes it is an empty array. when array is empty I want to push an object init when I try to add its index
selected_goal.add(INDEX,VALUE)
I want to push an object at the place of value please help me how can I do it…
this is my pojo:
public class SelectedGoal {
#SerializedName("id")
#Expose
private String id;
#SerializedName("goal_name")
#Expose
private String goalName;
#SerializedName("image")
#Expose
private String image;
#SerializedName("position")
#Expose
private String position;
#SerializedName("athlete_id")
#Expose
private String athleteId;
#SerializedName("coach_id")
#Expose
private String coachId;
#SerializedName("current_goal_id")
#Expose
private String currentGoalId;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getGoalName() {
return goalName;
}
public void setGoalName(String goalName) {
this.goalName = goalName;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getPosition() {
return position;
}
public void setPosition(String position) {
this.position = position;
}
public String getAthleteId() {
return athleteId;
}
public void setAthleteId(String athleteId) {
this.athleteId = athleteId;
}
public String getCoachId() {
return coachId;
}
public void setCoachId(String coachId) {
this.coachId = coachId;
}
public String getCurrentGoalId() {
return currentGoalId;
}
public void setCurrentGoalId(String currentGoalId) {
this.currentGoalId = currentGoalId;
}
}

selected_goal.add(INDEX,new SelectedGoal());
EDIT- To set values, make constuctor in your SelectedGoal class like.
public SelectedGoal(String id, String goalName, String image, String
position, String athleteId, String coachId, String currentGoalId) {
this.id = id;
this.goalName = goalName;
this.image = image;
this.position = position;
this.athleteId = athleteId;
this.coachId = coachId;
this.currentGoalId = currentGoalId;
}
finally add your object into list like..
selected_goal.add(INDEX,new SelectedGoal(id,goalName,image,position,athleteId,coachId,currentGoalId));

Related

Refer to Object from server response

On the server there is (as I understand it) an object. It has 2 values - the text and the color of this text. So - I need to get this text and color. At the moment everything is displayed together - TextView is passed the value [{"text": "WE RETURN 10% BONUSES", "textColor": "# 4c82a6"}] ,.
I need to get these values separately
"tag": [
{
"text": "ВЕРНЕМ 10% БОНУСАМИ",
"textColor": "#4c82a6"
}
],
Model
public class Item {
#SerializedName("id")
#Expose
private String id;
#SerializedName("name")
#Expose
private String name;
#SerializedName("image")
#Expose
private String image;
#SerializedName("isFavorite")
#Expose
private boolean isFavorite;
#SerializedName("prices")
#Expose
private Prices prices;
#SerializedName("full_set_prices")
#Expose
private Object fullSetPrices;
#SerializedName("isBestPrice")
#Expose
private boolean isBestPrice;
#SerializedName("tag")
#Expose
private Object tag;
#SerializedName("articul")
#Expose
private String articul;
#SerializedName("rating")
#Expose
private double rating;
#SerializedName("numberOfReviews")
#Expose
private int numberOfReviews;
#SerializedName("statusText")
#Expose
private String statusText;
#SerializedName("isAvailable")
#Expose
private boolean isAvailable;
#SerializedName("images")
#Expose
private List<String> images = null;
#SerializedName("categoryId")
#Expose
private String categoryId;
public String getId() {
return id;
}
public String getName() {
return name;
}
public String getImage() {
return image;
}
public boolean isIsFavorite() {
return isFavorite;
}
public Prices getPrices() {
return prices;
}
public Object getFullSetPrices() {
return fullSetPrices;
}
public boolean isIsBestPrice() {
return isBestPrice;
}
public Object getTag() {
return tag;
}
public void setTag(Object tag) {
this.tag = tag;
}
public String getArticul() {
return articul;
}
public void setArticul(String articul) {
this.articul = articul;
}
public double getRating() {
return rating;
}
public void setRating(double rating) {
this.rating = rating;
}
public int getNumberOfReviews() {
return numberOfReviews;
}
public void setNumberOfReviews(int numberOfReviews) {
this.numberOfReviews = numberOfReviews;
}
public String getStatusText() {
return statusText;
}
public void setStatusText(String statusText) {
this.statusText = statusText;
}
public boolean isIsAvailable() {
return isAvailable;
}
public void setIsAvailable(boolean isAvailable) {
this.isAvailable = isAvailable;
}
public List<String> getImages() {
return images;
}
public void setImages(List<String> images) {
this.images = images;
}
public String getCategoryId() {
return categoryId;
}
public void setCategoryId(String categoryId) {
this.categoryId = categoryId;
}
}

You could create another POJO for the tag instead of using Object.
public class Item {
...
#SerializedName("tag")
#Expose
private Tag tag;
...
}
public class Tag {
#SerializedName("text")
#Expose
private String text;
#SerializedName("textColor")
#Expose
private String textColor;
}
Then you can access the new values with item.getTag().getText(). Or if you'd rather make it appear that the two Tag fields are part of Item, you can create methods that delegate to Tag:
public class Item {
...
public String getText() {
return this.tag.getText();
}
public String getTextColor() {
return this.tag.getTextColor();
}
...
}

Java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY when want to get data into recyclerview

I have a json. I have to get source_url into my recyclerView -
[{
"id":3110,
"date":"2020-05-07T18:33:44",
"date_gmt":"2020-05-07T18:33:44",
"modified":"2020-05-07T18:35:37",
"modified_gmt":"2020-05-07T18:35:37",
"_embedded":{
"wp:featuredmedia":[
{
"id":3111,
"date":"2020-05-07T18:33:08",
"slug":"prof-dr-abul-khair",
"source_url":"https:\/\/www.healthmen.com.bd\/wpcontent\/uploads\/2020\/05\/Prof.-Dr.-Abul-Khair-scaled.jpg"
}]
}
}]
I want to get source_url from this JSON
But, here is an array wp:featuredmedia. So that, I followed this process-
Created a class named FeaturedMedia -
public class FeaturedMedia {
#SerializedName("source_url")
#Expose
private String souceurl;
public String getSourceurl(){
return sourceurl;
}
}
Then, I created another class named MediaDetails where I take the FeaturedMedia as a List-
public class MediaDetails{
#SerializedName("wp:featuredmedia")
List<FeaturedMedia> featureMediaList;
public List<FeaturedMedia> getFeaturedMediaList(){
return featuredMediaList;
}}
Then the Model Class-
public class Model{
#SerializedName("id")
#Expose
int id;
#SerializedName("_embedded")
#Expose
MediaDetalis embedded;
public int getId(){
return id;
}
public MediaDetails getEmbedded(){
return embedded;
}}
After all, I created RecyclerViewAdapter to get the data-
public CustomAdapter extends RecyclerView.Adapter<CustomAdapter.CustomAdapterHolder{
List<Model> modelList;
public void onBindViewHolder(#NonNull CustomAdapterHolder holder, int position){
final Model model=modelList.get(position);
int id= model.getId():
String embedded= String.valurOf(model.getEmbedded.getFeaturedMediaList());
}
But, embedded can not get the source_url value. I completed this CustomAdapter. Here I just presented needed code of that adapter. How can I get the source_url value in this RecyclerView?

Your POJO class will be (Respect to given JSON)
public class Model {
#SerializedName("id")
#Expose
private Integer id;
#SerializedName("date")
#Expose
private String date;
#SerializedName("date_gmt")
#Expose
private String dateGmt;
#SerializedName("modified")
#Expose
private String modified;
#SerializedName("modified_gmt")
#Expose
private String modifiedGmt;
#SerializedName("_embedded")
#Expose
private Embedded embedded;
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 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 Embedded getEmbedded() {
return embedded;
}
public void setEmbedded(Embedded embedded) {
this.embedded = embedded;
}
}
Then Embedded class
public class Embedded {
#SerializedName("wp:featuredmedia")
#Expose
private List<WpFeaturedmedium> wpFeaturedmedia = null;
public List<WpFeaturedmedium> getWpFeaturedmedia() {
return wpFeaturedmedia;
}
public void setWpFeaturedmedia(List<WpFeaturedmedium> wpFeaturedmedia) {
this.wpFeaturedmedia = wpFeaturedmedia;
}
}
Then WpFeaturedmedium
public class WpFeaturedmedium {
#SerializedName("id")
#Expose
private Integer id;
#SerializedName("date")
#Expose
private String date;
#SerializedName("slug")
#Expose
private String slug;
#SerializedName("source_url")
#Expose
private String sourceUrl;
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 getSlug() {
return slug;
}
public void setSlug(String slug) {
this.slug = slug;
}
public String getSourceUrl() {
return sourceUrl;
}
public void setSourceUrl(String sourceUrl) {
this.sourceUrl = sourceUrl;
}
}
Check - How to create POJO class

Model structure to parse JSON with Retrofit [duplicate]

This question already has answers here:
Why does Gson fromJson throw a JsonSyntaxException: Expected BEGIN_OBJECT but was BEGIN_ARRAY?
(2 answers)
GSON throwing "Expected BEGIN_OBJECT but was BEGIN_ARRAY"?
(11 answers)
Closed 4 years ago.
I have the following JSON structure:
[
{
"id":1,
"name":"car",
"elements":[
{
"id":1,
"name":"price",
"type":"textField",
"constraints":"blablabla"
},
{
"id":2,
"name":"color",
"type":"textField",
"constraints":"blablabla"
},
{
"id":3,
"name":"images",
"type":"image",
"constraints":"blablabla"
}
]
}
]
And I have the following models:
public class Product {
private Long id;
private String name;
#Expose
private Element elements;
public Product(Long id, String name, Element elements) {
this.id = id;
this.name = name;
this.elements = elements;
}
public Long getId() {
return id;
}
public String getName() {
return name;
}
public Element getElements() {
return elements;
}
}
public class Element {
private Long id;
private String name;
private String type;
private String constraints;
public Element(Long id, String name, String constraints, String type) {
this.id = id;
this.type=type;
this.name = name;
this.constraints = constraints;
}
public String getType() {
return type;
}
public Long getId() {
return id;
}
public String getName() {
return name;
}
public String getConstraints() {
return constraints;
}
}
The Elements model is which I have problems, I am getting the following error:
ERROR: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 35 path $[0].elements
How can I change the model to make it work? I tried to change the elements in Product class to JSONObject array but when I wanted to parse, it was empty.

You need to modify your POJOs like this:
Element.java
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Element {
#SerializedName("id")
#Expose
private Integer id;
#SerializedName("name")
#Expose
private String name;
#SerializedName("type")
#Expose
private String type;
#SerializedName("constraints")
#Expose
private String constraints;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getConstraints() {
return constraints;
}
public void setConstraints(String constraints) {
this.constraints = constraints;
}
}
Product.java
import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Product {
#SerializedName("id")
#Expose
private Integer id;
#SerializedName("name")
#Expose
private String name;
#SerializedName("elements")
#Expose
private List<Element> elements = null;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<Element> getElements() {
return elements;
}
public void setElements(List<Element> elements) {
this.elements = elements;
}
}
P.S: You should use 'http://www.jsonschema2pojo.org/' website for generating POJO automatically from the JSON string you provide to it.
I hope this helps.

I think you try to put an array of Elements into "private Element elements" which is a single object

Change your pojo with this. Also you can add your respective constructor which you require.
public class Element {
#SerializedName("id")
#Expose
private Integer id;
#SerializedName("name")
#Expose
private String name;
#SerializedName("type")
#Expose
private String type;
#SerializedName("constraints")
#Expose
private String constraints;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getConstraints() {
return constraints;
}
public void setConstraints(String constraints) {
this.constraints = constraints;
}
}
public class Product {
#SerializedName("id")
#Expose
private Integer id;
#SerializedName("name")
#Expose
private String name;
#SerializedName("elements")
#Expose
private List<Element> elements = null;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public List<Element> getElements() {
return elements;
}
public void setElements(List<Element> elements) {
this.elements = elements;
}
}

in json you have list of Element and in the model you declared Element as an Object
change this private Element elements; to List of Element

Try this pojo or you can make from this link
private String id;
private String name;
private ArrayList<Elements> elements;
public String getId ()
{
return id;
}
public void setId (String id)
{
this.id = id;
}
public String getName ()
{
return name;
}
public void setName (String name)
{
this.name = name;
}
public ArrayList<Elements> getElements ()
{
return elements;
}
public void setElements (ArrayList<Elements> elements)
{
this.elements = elements;
}
#Override
public String toString()
{
return "ClassPojo [id = "+id+", name = "+name+", elements = "+elements+"]";
}
public class Elements
{
private String id;
private String name;
private String constraints;
private String type;
public String getId ()
{
return id;
}
public void setId (String id)
{
this.id = id;
}
public String getName ()
{
return name;
}
public void setName (String name)
{
this.name = name;
}
public String getConstraints ()
{
return constraints;
}
public void setConstraints (String constraints)
{
this.constraints = constraints;
}
public String getType ()
{
return type;
}
public void setType (String type)
{
this.type = type;
}
#Override
public String toString()
{
return "ClassPojo [id = "+id+", name = "+name+", constraints = "+constraints+",
type = "+type+"]";
}
}

Missing object when using #SerializedName with Retrofit call

I'm developing an Android app which connects to a Springboot server.
The app (using okhttp3 and retrofit) calls the server which returns an array list in an object (Photo Response) below.
The list is populating but the object MediaContentGroup does not populate in any photo object even though the fields of id and title do.
I've debugged through my server to ensure that I am using the correct object names when using #SerializedName.
I'm pretty new to Android development and using springboot, so if anyone could help me to understand why the MediaContentGroup object is always null, I would really appreciate it.
Is there any possible way I've set it to only accept Strings??
Thanks
public class PhotoResponse {
#SerializedName("photoFeed")
#Expose
private PhotoFeed photoFeed;
public PhotoFeed getPhotoFeed() {
return photoFeed;
}
}
public class PhotoFeed {
#SerializedName("photoList")
#Expose
private List<Photo> photoList = new ArrayList<>();
public List<Photo> getPhotoList() {
return photoList;
}
}
public class Photo {
public final static int HD_720_WIDTH = 1280;
public final static int HD_720_HEIGHT = 720;
#SerializedName("id")
#Expose
private String id;
#SerializedName("title")
#Expose
private String title;
#SerializedName("mediaContentGroup")
#Expose
private MediaContentGroup mediaContentGroup;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public void setMediaContentGroup(MediaContentGroup mediaContentGroup){
this.mediaContentGroup = mediaContentGroup;
}
public MediaContentGroup getMediaContentGroup(){
return this.mediaContentGroup;
}
public String getImageUrl() {
return mediaContentGroup.getImages().get(0).getUrl();
}
public String getThumbUrl() {
return mediaContentGroup.getThumbnails().get(0).getUrl();
}
}
public class MediaContentGroup {
#SerializedName("images")
#Expose
public List<MediaContent> images = new ArrayList<>();
public void setImages(List<MediaContent> images){ this.images = images;}
public List<MediaContent> getImages() {
return images;
}
#SerializedName("thumbnails")
#Expose
public List<Thumbnail> thumbnails = new ArrayList<>();
public void setThumbnails(List<Thumbnail> thumbnails){ this.thumbnails = thumbnails;}
public List<Thumbnail> getThumbnails() {
return thumbnails;
}
}
public class Thumbnail {
#SerializedName("url")
#Expose
private String url;
public void setUrl(String url) {
this.url = url;
}
public String getUrl() {
return url;
}
}

Sugar ORM doesnt store data

I am using Sugar ORM 1.3.1 and i am trying to save the following objects
public class Article extends SugarRecord<Article> implements Serializable {
#JsonProperty("Categories")
private List<Category> categories = new ArrayList<Category>();
#JsonProperty("Contents")
private List<Content> contents = new ArrayList<Content>();
#JsonProperty("Country")
private CountryRelated country;
#JsonProperty("Description")
private String description;
#JsonProperty("ExpiryDate")
private String expiryDate;
#JsonProperty("ExtraFields")
private List<ExtraField> extraFields = new ArrayList<ExtraField>();
#JsonProperty("Identifier")
private int identifier;
#JsonProperty("ImageURL")
private String imageURL;
#JsonProperty("Name")
private String name;
#JsonProperty("PortalID")
private int portalID;
#JsonProperty("PublishDate")
private String publishDate;
#JsonProperty("Region")
private Region region;
#JsonProperty("Related")
private List<Related> related = new ArrayList<Related>();
#JsonProperty("Newsbite")
private boolean newsbite;
#JsonProperty("ShareURL")
private String shareURL;
#JsonProperty("Tags")
private List<Tag> tags = new ArrayList<Tag>();
#JsonProperty("Type")
private int type;
public Article() {
}
public Article(List<Category> categories, List<Content> contents, List<ExtraField> extraFields, CountryRelated country, String description, String expiryDate, int identifier, String imageURL, String name, boolean newsbite, int portalID, String publishDate, Region region, List<Related> related, String shareURL, List<Tag> tags, int type) {
this.categories = categories;
this.contents = contents;
this.extraFields = extraFields;
this.country = country;
this.description = description;
this.expiryDate = expiryDate;
this.identifier = identifier;
this.imageURL = imageURL;
this.name = name;
this.newsbite = newsbite;
this.portalID = portalID;
this.publishDate = publishDate;
this.region = region;
this.related = related;
this.shareURL = shareURL;
this.tags = tags;
this.type = type;
}
public List<Category> getCategories() {
return categories;
}
public void setCategories(List<Category> categories) {
this.categories = categories;
}
public List<Content> getContents() {
return contents;
}
public void setContents(List<Content> contents) {
this.contents = contents;
}
public List<ExtraField> getExtraFields() {
return extraFields;
}
public void setExtraFields(List<ExtraField> extraFields) {
this.extraFields = extraFields;
}
public CountryRelated getCountry() {
return country;
}
public void setCountry(CountryRelated country) {
this.country = country;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getExpiryDate() {
return expiryDate;
}
public void setExpiryDate(String expiryDate) {
this.expiryDate = expiryDate;
}
public int getIdentifier() {
return identifier;
}
public void setIdentifier(int identifier) {
this.identifier = identifier;
}
public String getImageURL() {
return imageURL;
}
public void setImageURL(String imageURL) {
this.imageURL = imageURL;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public boolean isNewsbite() {
return newsbite;
}
public void setNewsbite(boolean newsbite) {
this.newsbite = newsbite;
}
public int getPortalID() {
return portalID;
}
public void setPortalID(int portalID) {
this.portalID = portalID;
}
public String getPublishDate() {
return publishDate;
}
public void setPublishDate(String publishDate) {
this.publishDate = publishDate;
}
public Region getRegion() {
return region;
}
public void setRegion(Region region) {
this.region = region;
}
public List<Related> getRelated() {
return related;
}
public void setRelated(List<Related> related) {
this.related = related;
}
public String getShareURL() {
return shareURL;
}
public void setShareURL(String shareURL) {
this.shareURL = shareURL;
}
public List<Tag> getTags() {
return tags;
}
public void setTags(List<Tag> tags) {
this.tags = tags;
}
public int getType() {
return type;
}
public void setType(int type) {
this.type = type;
}
}
Category.class
public class Category extends SugarRecord<Category> implements Serializable {
#JsonProperty("Identifier")
private int identifier;
#JsonProperty("Name")
private String name;
public constructor + getters and setters }
Content.class and CountryRelated.class have same structure
after i do article.save() my lists doesnt save . Am i doing something wrong or it doesnt save lists at all ???

I few things to look at.
First. I do not believe that the database will handle a column with the type of List or a type of other Object. When I tried running your code, I received:
Class cannot be read from Sqlite3 database. Please check the type of field categories(java.util.List)
These should be types the database can store. Try serializing your List(s) to Strings to insert them in the db. You can try doing this in your getter and setter. The setter takes the list of objects and converts it to a serialized String, the getter takes the serialized String and converts it back to a list of objects.
In the instance of SugarOrm, you can reference another table and it will create a relationship outlined here:
http://satyan.github.io/sugar/creation.html#why
Notice the "Author" type is just referencing a record from another table in the database.
Second I usually try and set my default values inside my default constructor. so something like:
... property declarations...
public Article() {
this.name = "Default Value";
}
Hope this helps you finish troublshooting!

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

add object into GSON array android studio - android

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