I have a JSON string like this:
{
"response":[2,
{
"id":"187",
"name":"John",
"surname":"Corner"
},
{
"id":"254",
"name":"Bob",
"surname":"Marley"
}
]
}
How can I parse it using GSON lib in Java?
I tried:
static class SearchRequest {
private Names[] response;
static class Names {
private int id;
private String name;
private String surname;
}
}
but it doesn't works :(
response array contains not only Names, it also contains an integer value: response[0]=2.
So you must use something like
private Object[] response;
ADD:
I think, you have no need to change your JSON, because your response is private, so you should use getters:
static class SearchRequest {
private Object[] response;
static class Names {
private int id;
private String name;
private String surname;
}
public List<Names> getNames() {
List list = new ArrayList();
list.addAll(Arrays.asList(response));
return (List<Names>) list.subList(1, response.length);
}
public int getAmount() {
return (Integer) response[0];
}
public void setNames(List<Names> names) {
response = new Object[names.size() + 1];
response[0] = names.size();
for (int i = 0, namesSize = names.size(); i < namesSize; i++) {
response[i + 1] = names.get(i);
}
}
}
I prepared a sample code for testing your case, used gson-2.1.jar as library and run it correctly. I modified your JSON string by removing "2," from the beginning of response array since it caused exceptions. Take a look at and test this code:
import com.google.gson.Gson;
public class Test
{
static class SearchRequest
{
private Names [] response;
static class Names
{
private int id;
private String name;
private String surname;
}
}
public static void main ( String [] args )
{
Gson gson = new Gson();
String str = "{ \"response\":"
+ "[{\"id\":\"187\",\"name\":\"John\",\"surname\":\"Corner\"},"
+ "{\"id\":\"254\",\"name\":\"Bob\",\"surname\":\"Marley\"}]}";
SearchRequest request = new SearchRequest();
request = gson.fromJson( str, SearchRequest.class );
System.out.println( "name of 1st: " + request.response [ 0 ].name );
System.out.println( "surname of 2nd: " + request.response [ 1 ].surname );
}
}
Output:
name of 1st: John
surname of 2nd: Marley
Related
I have the below json which im serializing
{
"name":"John",
"switch":"1"
},
{
"name":"Jim",
"switch":"0"
}
I want to serialize it to a differnt name So I had to do it like below
class Data {
private String name;
private String flag;
#JsonProperty("flag")
public byte getFlag() {
return flag;
}
#JsonProperty("switch")
public void setSwitch(String s) {
this.flag = flag;
}
}
So that I get it converted as below
{
"name":"John",
"flag":"1"
},
{
"name":"Jim",
"flag":"0"
}
Now I wanted to map the numic values to Y and N for 1 and 0 respectively. Can I acheive that ?
Im expecting my final string to be like this
{
"name":"John",
"switch":"Y"
},
{
"name":"Jim",
"switch":"N"
}
I agree with #Gaël J, but still if you want to go ahead this code change might help you to convert that 1/0 to Y/N.
public class Application {
#ToString
static class Input {
#JsonProperty("name")
private String name;
#JsonProperty("switch")
private String flag;
#JsonProperty("name")
public void setName(String name){
this.name = name;
}
#JsonProperty("switch")
public void setSwitch(String s) {
for(SwitchMap valuePair : SwitchMap.values()){
if(valuePair.getValue().equals(s)){
this.flag = valuePair.name();
}
}
}
}
public static void main(String[] args) throws JsonProcessingException {
String json = "{\n" +
"\"name\":\"John\",\n" +
"\"switch\":\"1\"\n" +
"}";
ObjectMapper mapper = new ObjectMapper();
Input in = mapper.readValue(json, Input.class);
System.out.println(mapper.writeValueAsString(in));
}
}
define an enum with the mapping
#Getter
public enum SwitchMap {
Y("1"),
N("0");
private final String value;
private SwitchMap(String value){
this.value = value;
}
}
I am trying to use Jackson to parse sample json as demonstrated below. However, I the parsing doesn't work (fails without any exceptions - as I get an empty string for event.getAccountId(); What could I be doing wrong?
Thanks!
ObjectMapper om = new ObjectMapper();
String json = "{\"_procurementEvent\" : [{ \"accountId\" : \"3243234\",\"procurementType\" : \"view\"," +
"\"_procurementSubType\" : \"Standard Connector\",\"_quantity\" : \"4\", \"_pricePerMonth\" : \"100.00\"" +
",\"_annualPrice\" : \"1200.00\"}]}";
ProcurementEvent event = om.readValue(json, ProcurementEvent.class);
event.getAccountId(); // returns null
#JsonIgnoreProperties(ignoreUnknown = true)
private static class ProcurementEvent {
private String _accountId;
private String _procurementType;
private String _quantity;
private String _pricePerMonth;
private String _annualPrice;
#JsonProperty("accountId")
public String getAccountId() {
return _accountId;
}
public void setAccountId(String accountId) {
_accountId = accountId;
}
#JsonProperty("procurementType")
public String getProcurementType() {
return _procurementType;
}
public void setProcurementType(String procurementType) {
_procurementType = procurementType;
}
#JsonProperty("_quantity")
public String getQuantity() {
return _quantity;
}
public void setQuantity(String quantity) {
_quantity = quantity;
}
#JsonProperty("_pricePerMonth")
public String getPricePerMonth() {
return _pricePerMonth;
}
public void setPricePerMonth(String pricePerMonth) {
_pricePerMonth = pricePerMonth;
}
#JsonProperty("_annualPrice")
public String getAnnualPrice() {
return _annualPrice;
}
public void setAnnualPrice(String annualPrice) {
_annualPrice = annualPrice;
}
}
In the question, try the following approach:
class ProcurementEvents {
private List<ProcurementEvent> _procurementEvent; // + annotations like #JsonIgnoreProperties, getters/ setters, etc.
}
// json from your example
ProcurementEvents events = om.readValue(json, ProcurementEvents.class);
events.get(0).getAccountId();
hello i have Json response like this
[
{
"question": "hhhhh",
"question_answer": "hhhh ",
"question_type": "question type",
"questioner_age": "questioner age",
"questioner_city": "questioner city",
"questioner_country": "questioner country",
"questioner_name": "questioner name",
"questioner_sex": "questioner sex",
"comments_allowed": "1",
"question_id": "63",
"question_date": "05/08/2017 - 19:33",
"is_public": "1"
},
{
"question": "hhhh !!",
"question_answer": "hhhh",
"question_type": [],
"questioner_age": [],
"questioner_city": [],
"questioner_country": [],
"questioner_name": "hhhhh",
"questioner_sex": [],
"comments_allowed": "1",
"question_id": "57",
"question_date": "04/30/2017 - 14:24",
"is_public": "1"
}
]
if the column is null will return as an array like this "question_type": [],
if not will return as a string !
so i tried to get this response on retrofit but i failed and always got this error
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 4 column 2 path $
after i searched in the internet i tried something like this but its not working !!
Gson gson = new Gson();
String json = response.body().toString();
if (json instanceof String)
{
MyQuestionModelString parseObject = gson.fromJson(json, MyQuestionModelString.class);
apiCallResponse.onSuccess(parseObject,responseMessage);
}else {
MyQuestionModel parseObject = gson.fromJson(json, MyQuestionModel.class);
apiCallResponse.onSuccess(parseObject,responseMessage);
}
any help !
UPDATAE !
this is my model for this response and same error !!!
public class MyQuestionModel {
#SerializedName("question")
#Expose
private String question;
#SerializedName("question_answer")
#Expose
private String questionAnswer;
#SerializedName("question_type")
#Expose
private List<Object> questionType = null;
#SerializedName("questioner_age")
#Expose
private List<Object> questionerAge = null;
#SerializedName("questioner_city")
#Expose
private List<Object> questionerCity = null;
#SerializedName("questioner_country")
#Expose
private List<Object> questionerCountry = null;
#SerializedName("questioner_name")
#Expose
private String questionerName;
#SerializedName("questioner_sex")
#Expose
private List<Object> questionerSex = null;
#SerializedName("comments_allowed")
#Expose
private String commentsAllowed;
#SerializedName("question_id")
#Expose
private String questionId;
#SerializedName("question_date")
#Expose
private String questionDate;
#SerializedName("is_public")
#Expose
private String isPublic;
}
My Main issue that how to define this field ! question_type
screen shot
During the parsing of json if the SerializedName key is not found it will throw an exception. Use #Expose to let the deserializer to know that this field can be null. Here is a similar Model of your mentioned response
public class ResponsePojo {
List<Data> data;
public class Data {
#Expose
#SerializedName("question")
String question;
#Expose
#SerializedName("question_answer")
String questionAnswer;
#Expose
#SerializedName("question_type")
String questionType;
#Expose
#SerializedName("questioner_age")
String questionerAge;
#Expose
#SerializedName("questioner_city")
String questionerCity;
#Expose
#SerializedName("questioner_country")
String questionerCountry;
#Expose
#SerializedName("questioner_name")
String questionerName;
#Expose
#SerializedName("questioner_sex")
String questionerSex;
#Expose
#SerializedName("comments_allowed")
String commentsAllowed;
#Expose
#SerializedName("question_id")
String questionId;
#Expose
#SerializedName("question_date")
String questionDate;
#Expose
#SerializedName("is_public")
String isPublic;
}
}
You must indicate which paramters or objects in the model are optional with #Exposed tag.
Example
#Expose
#SerializedName("question_type")
private String mQuestionType;
You problem is
ava.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 4 column 2 path $
If your json code is [...],your return is JSONArray , you can use Gsonto parse it to List<Object> .
If your json code is {...},your return is JSONObject , you can use Gsonto parse it to Object .
So you should use List<MyQuestionModel> to get parsed data .
Change MyQuestionModel to List<MyQuestionModel> in your call code .
Sample
Call<List<MyQuestionModel>> getData();
And my code for doing it .
JSONEntity for you json
public class JSONEntity {
/**
* question : hhhhh
* question_answer : hhhh
* question_type : question type
* questioner_age : questioner age
* questioner_city : questioner city
* questioner_country : questioner country
* questioner_name : questioner name
* questioner_sex : questioner sex
* comments_allowed : 1
* question_id : 63
* question_date : 05/08/2017 - 19:33
* is_public : 1
*/
private String question;
private String question_answer;
private String question_type;
private String questioner_age;
private String questioner_city;
private String questioner_country;
private String questioner_name;
private String questioner_sex;
private String comments_allowed;
private String question_id;
private String question_date;
private String is_public;
public String getQuestion() {
return question;
}
public void setQuestion(String question) {
this.question = question;
}
public String getQuestion_answer() {
return question_answer;
}
public void setQuestion_answer(String question_answer) {
this.question_answer = question_answer;
}
public String getQuestion_type() {
return question_type;
}
public void setQuestion_type(String question_type) {
this.question_type = question_type;
}
public String getQuestioner_age() {
return questioner_age;
}
public void setQuestioner_age(String questioner_age) {
this.questioner_age = questioner_age;
}
public String getQuestioner_city() {
return questioner_city;
}
public void setQuestioner_city(String questioner_city) {
this.questioner_city = questioner_city;
}
public String getQuestioner_country() {
return questioner_country;
}
public void setQuestioner_country(String questioner_country) {
this.questioner_country = questioner_country;
}
public String getQuestioner_name() {
return questioner_name;
}
public void setQuestioner_name(String questioner_name) {
this.questioner_name = questioner_name;
}
public String getQuestioner_sex() {
return questioner_sex;
}
public void setQuestioner_sex(String questioner_sex) {
this.questioner_sex = questioner_sex;
}
public String getComments_allowed() {
return comments_allowed;
}
public void setComments_allowed(String comments_allowed) {
this.comments_allowed = comments_allowed;
}
public String getQuestion_id() {
return question_id;
}
public void setQuestion_id(String question_id) {
this.question_id = question_id;
}
public String getQuestion_date() {
return question_date;
}
public void setQuestion_date(String question_date) {
this.question_date = question_date;
}
public String getIs_public() {
return is_public;
}
public void setIs_public(String is_public) {
this.is_public = is_public;
}
}
And the code for parse it .
Gson gson = new Gson();
String jsonString = response.body().string();
Type type = new TypeToken<List<JSONEntity>>() {
}.getType();
List<JSONEntity> datas = gson.fromJson(jsonString, type);
EDIT
If your response is JSONArray , you can try like this .
List<JSONEntity> datas = response.body();
Try to change your JSON Structure
First Approach
To
If the column is null return "question_type": null,else show "question_type": "value"
Instead
If the column is null will return as an array like this "question_type": [], if not will return as a string!
Second Approach Without changing Json structure
Handling Dynamic JSON Using Gson
Try this:
You have to use deserialize to parse dynamic datatype in json
In the reponse pojo use object
Ex:
Call<Object> call = //your API call ResponsePojo instead use `Object`
call.enqueue(new Callback<Object>()
{
#Override
public void onResponse(Response<Object> response, Retrofit retrofit)
{
try {
JSONArray jsonArray=new JSONArray(json);
for (int i = 0; i < jsonArray.length(); i++) {
Gson gson = new GsonBuilder()
.registerTypeAdapter(ServerResponse.class, new ServerResponse.OptionsDeserilizer())
.create();
ServerResponse serverResponse=gson.fromJson(jsonArray.get(i).toString(), ServerResponse.class);
System.out.println(serverResponse);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
#Override
public void onFailure(Throwable t)
{
///Handle failure
}
});
Use this ServerResponsePojo with JsonDeserializer
import android.text.TextUtils;
import com.google.gson.Gson;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;
public class ServerResponse {
#SerializedName("question")
#Expose
private String question;
#SerializedName("question_answer")
#Expose
private String questionAnswer;
private String questionerName;
#SerializedName("comments_allowed")
#Expose
private String commentsAllowed;
#SerializedName("question_id")
#Expose
private String questionId;
#SerializedName("question_date")
#Expose
private String questionDate;
#SerializedName("is_public")
#Expose
private String isPublic;
public String getQuestion() {
return question;
}
public void setQuestion(String question) {
this.question = question;
}
public String getQuestionAnswer() {
return questionAnswer;
}
public void setQuestionAnswer(String questionAnswer) {
this.questionAnswer = questionAnswer;
}
/* public List<OptionValue> getQuestionerAge() {
return questionerAge;
}
public void setQuestionerAge(List<OptionValue> questionerAge) {
this.questionerAge = questionerAge;
}
public List<OptionValue> getQuestionerCity() {
return questionerCity;
}
public void setQuestionerCity(List<OptionValue> questionerCity) {
this.questionerCity = questionerCity;
}
public List<OptionValue> getQuestionerCountry() {
return questionerCountry;
}
public void setQuestionerCountry(List<OptionValue> questionerCountry) {
this.questionerCountry = questionerCountry;
}
*/
public String getQuestionerName() {
return questionerName;
}
public void setQuestionerName(String questionerName) {
this.questionerName = questionerName;
}
/*
public List<OptionValue> getQuestionerSex() {
return questionerSex;
}
public void setQuestionerSex(List<OptionValue> questionerSex) {
this.questionerSex = questionerSex;
}*/
public String getCommentsAllowed() {
return commentsAllowed;
}
public void setCommentsAllowed(String commentsAllowed) {
this.commentsAllowed = commentsAllowed;
}
public String getQuestionId() {
return questionId;
}
public void setQuestionId(String questionId) {
this.questionId = questionId;
}
public String getQuestionDate() {
return questionDate;
}
public void setQuestionDate(String questionDate) {
this.questionDate = questionDate;
}
public String getIsPublic() {
return isPublic;
}
public void setIsPublic(String isPublic) {
this.isPublic = isPublic;
}
public class OptionValue {
}
public void setQuestionType(String questionType) {
this.questionType = questionType;
}
String questionType;
public static class OptionsDeserilizer implements JsonDeserializer<ServerResponse> {
#Override
public ServerResponse deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
Type listType = new TypeToken<ServerResponse>() {
}.getType();
ServerResponse options = (ServerResponse) new Gson().fromJson(json, listType);
JsonObject jsonArrayValue = json.getAsJsonObject();
for (int i = 0; i < jsonArrayValue.size(); i++) {
JsonObject jsonObject = jsonArrayValue.getAsJsonObject();
if (jsonObject.has("question_type")) {
JsonElement elem = (JsonElement) jsonObject.get("question_type");
if (elem != null && !elem.isJsonNull() && !elem.isJsonArray()) {
String valuesString = elem.getAsString();
if (!TextUtils.isEmpty(valuesString)) {
options.setQuestionType(valuesString);
} else {
options.setQuestionType("");
}
//Do your other stuffs
}
}
}
return options;
}
}
}
This is working happy codeing
I am working on Google charts API and
Google Visualization Candlestick Charts expects data to be an array of arrays for it to work .
For example the below format
[
[ "2011-08-01", 136.65, 136.96, 134.15, 136.49 ],
[ "2011-08-02", 135.26, 135.95, 131.50, 131.85 ],
[ "2011-08-05", 132.90, 135.27, 128.30, 135.25 ]
]
This is my SQL by which i am retrieving the data from database
String selectsql = "select current_day , open_val , high_val , low_val , close_val from historical_data where symbol_name = ?";
while(Rset.next())
{
String current_day = SgxRset.getString("current_day");
String open_val = SgxRset.getString("open_val");
String high_val = SgxRset.getString("high_val");
String low_val = SgxRset.getString("low_val");
String close_val = SgxRset.getString("close_val");
}
Could you please tell me how to construct how to construct an array of arrays ??
sample program
import java.util.ArrayList;
import java.util.List;
import org.json.JSONException;
public class TestJSON {
public static void main(String[] args) throws JSONException {
Employee emp1 = new Employee();
emp1.setName("Ravi");
emp1.setName("20");
Employee emp2 = new Employee();
emp2.setName("Kiran");
emp2.setName("20");
List<Employee> histList = new ArrayList<Employee>();
Object[] arrayResultData = histList.toArray();
}
}
public class Employee {
String name ;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
String age ;
}
Create a class which will held all these data together in an object like this with getters and setters:
public class Data {
private String current_day;
private double open_val;
private double high_val;
private double low_val;
private double close_val;
public Data(String current_day, double open_val, double high_val,
double low_val, double close_val) {
this.current_day = current_day;
this.open_val = open_val;
this.high_val = high_val;
this.low_val = low_val;
this.close_val = close_val;
}
public String getCurrent_day() {
return current_day;
}
public void setCurrent_day(String current_day) {
this.current_day = current_day;
}
public double getOpen_val() {
return open_val;
}
public void setOpen_val(double open_val) {
this.open_val = open_val;
}
public double getHigh_val() {
return high_val;
}
public void setHigh_val(double high_val) {
this.high_val = high_val;
}
public double getLow_day() {
return low_val;
}
public void setLow_day(double low_day) {
this.low_val = low_day;
}
public double getClose_day() {
return close_val;
}
public void setClose_day(double close_day) {
this.close_val = close_day;
}
}
Now, store the data in array of objects which you are getting from SQL.
String selectsql = "select current_day , open_val , high_val , low_val ,close_val from historical_data where symbol_name = ?";
List<Data> myList = new ArrayList(Data);
while(Rset.next())
{
String current_day = SgxRset.getString("current_day");
String open_val = SgxRset.getString("open_val");
String high_val = SgxRset.getString("high_val");
String low_val = SgxRset.getString("low_val");
String close_val = SgxRset.getString("close_val");
Data data = new Data(current_day,open_val,high_val,low_val,close_val);
myList.add(data);
}
For reading data, you can write:
String a = "[ ";
for (int i = 0; i < myList.size(); i++) {
String b = "[ \"" + myList.get(i).getCurrent_day() + "\" , "
+ myList.get(i).getOpen_val() + "],";
if(i==myList.size() -1)
a += b;
else
a += b+",";
}
a += " ]";
Now, for me the output is:
[ [ "2011-08-01" , 136.65],[ "2011-08-02" , 135.26] ]
I recommend a List. You don't know what your columns are and how many you have:
List<HistData> histList = new ArrayList<HistData>();
//.. query db
while(Rset.next()){
HistData histData = new HistData();
histData.setCurrentDay( SgxRset.getString("current_day"));
histData.setOpenVal( SgxRset.getString("open_val"));
histData.setHighVal( SgxRset.getString("high_val"));
histData.setLowVal( SgxRset.getString("low_val"));
histData.setCloseVal( SgxRset.getString("close_val"));
histList.add(histData);
}
HistData is just a POJO, but you can change the datatypes in the bean and the SgxRset retrieval type, so you are not locked in to any array type. Using a List as opposed to an array provides more flexibility in case you are returning many results of unknown length.
public class HistData {
public HistData(){}
String currentDay;
public setCurrentDay(String currentDay){
this.currentDay = currentDay;
}
public getCurrentDay(){
return currentDay;
}
// .. etc.
}
Use a List and the toArray Method
String selectsql = "select current_day , open_val , high_val , low_val , close_val from historical_data where symbol_name = ?";
List<String[]>resultData = new ArrayList<Stirng[]>();
while(Rset.next())
{
String[] array = new String[5];
array[0] = SgxRset.getString("current_day");
array[1] = SgxRset.getString("open_val");
array[2] = SgxRset.getString("high_val");
array[3] = SgxRset.getString("low_val");
array[4] = SgxRset.getString("close_val");
}
Object[] arrayResultData = resultData.toArray();
I'm trying deserializes a JSONArray to List. To do it I'm trying use Gson but I can't understand why doesn't works and all values of JSON are null.
How could I do this ?
JSON
{ "result" : [
{ "Noticia" : {
"created" : "2015-08-20 19:58:49",
"descricao" : "tttttt",
"id" : "19",
"image" : null,
"titulo" : "ddddd",
"usuario" : "FERNANDO PAIVA"
} },
{ "Noticia" : {
"created" : "2015-08-20 19:59:57",
"descricao" : "hhhhhhhh",
"id" : "20",
"image" : "logo.png",
"titulo" : "TITULO DA NOTICIA",
"usuario" : "FERNANDO PAIVA"
} }
] }
Deserializes
List<Noticia> lista = new ArrayList<Noticia>();
Gson gson = new Gson();
JSONArray array = obj.getJSONArray("result");
Type listType = new TypeToken<List<Noticia>>() {}.getType();
lista = gson.fromJson(array.toString(), listType);
//testing - size = 2 but value Titulo is null
Log.i("LISTSIZE->", lista.size() +"");
for(Noticia n:lista){
Log.i("TITULO", n.getTitulo());
}
Class Noticia
public class Noticia implements Serializable {
private static final long serialVersionUID = 1L;
private Integer id;
private String titulo;
private String descricao;
private String usuario;
private Date created;
private String image;
There are two problems with your code :
First is that you are using a getJsonArray() to get the array,
which isn't part of Gson library, you need to use
getAsJsonArray() method instead.
Second is that you are using array.toString() which isn't obvious
because for the fromJson method you need a jsonArray as
parameter and not String and that will cause you parse problems, just remove it.
And use the following code to convert your jsonArray to List<Noticia> :
Type type = new TypeToken<List<Noticia>>() {}.getType();
List<Noticia> lista = gson.fromJson(array, type);
And your whole code will be:
Gson gson = new Gson();
JSONArray array = obj.getAsJsonArray("result");
Type type = new TypeToken<List<Noticia>>() {}.getType();
List<Noticia> lista = gson.fromJson(array, type);
//testing - size = 2 but value Titulo is null
Log.i("LISTSIZE->", lista.size() +"");
for(Noticia n:lista){
Log.i("TITULO", n.getTitulo());
}
I think the problem could be something to do with toString() on JSONArray. But are you using obj.getAsJsonArray method?
Try this:
JSONArray arr = obj.getAsJsonArray("result");
Type listType = new TypeToken<List<Noticia>>() {
}.getType();
return new Gson().fromJson(arr , listType);
Noticia.java
public class Noticia {
private String created;
private String descricao;
private String id;
private String image;
private String titulo;
private String usuario;
public String getCreated() {
return created;
}
public void setCreated(String created) {
this.created = created;
}
public String getDescricao() {
return descricao;
}
public void setDescricao(String descricao) {
this.descricao = descricao;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getTitulo() {
return titulo;
}
public void setTitulo(String titulo) {
this.titulo = titulo;
}
public String getUsuario() {
return usuario;
}
public void setUsuario(String usuario) {
this.usuario = usuario;
}
#Override
public String toString() {
return "Noticia [created=" + created + ", descricao=" + descricao
+ ", id=" + id + ", image=" + image + ", titulo=" + titulo
+ ", usuario=" + usuario + "]";
}
}
Result.java
public class Result {
private Noticia Noticia;
public Noticia getNoticia() {
return Noticia;
}
public void setNoticia(Noticia noticia) {
Noticia = noticia;
}
#Override
public String toString() {
return "Result [Noticia=" + Noticia + "]";
}
}
Item.java
import java.util.List;
public class Item {
private List<Result> result;
public List<Result> getResult() {
return result;
}
public void setResult(List<Result> result) {
this.result = result;
}
#Override
public String toString() {
return "Item [result=" + result + "]";
}
}
Main.java
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.testgson.beans.Item;
public class Main {
private static Gson gson;
static {
gson = new GsonBuilder().create();
}
public static void main(String[] args) {
String j = "{\"result\":[{\"Noticia\":{\"created\":\"2015-08-20 19:58:49\",\"descricao\":\"tttttt\",\"id\":\"19\",\"image\":null,\"titulo\":\"ddddd\",\"usuario\":\"FERNANDO PAIVA\"}},{\"Noticia\":{\"created\":\"2015-08-20 19:59:57\",\"descricao\":\"hhhhhhhh\",\"id\":\"20\",\"image\":\"logo.png\",\"titulo\":\"TITULO DA NOTICIA\",\"usuario\":\"FERNANDO PAIVA\"}}]}";
Item r = gson.fromJson(j, Item.class);
System.out.println(r);
}
}
Final result
Item [result=[Result [Noticia=Noticia [created=2015-08-20 19:58:49, descricao=tttttt, id=19, image=null, titulo=ddddd, usuario=FERNANDO PAIVA]], Result [Noticia=Noticia [created=2015-08-20 19:59:57, descricao=hhhhhhhh, id=20, image=logo.png, titulo=TITULO DA NOTICIA, usuario=FERNANDO PAIVA]]]]
You parse json, that looks like
{ "result" : [
{
"created" : "2015-08-20 19:58:49",
"descricao" : "tttttt",
"id" : "19",
"image" : null,
"titulo" : "ddddd",
"usuario" : "FERNANDO PAIVA"
},
{
"created" : "2015-08-20 19:59:57",
"descricao" : "hhhhhhhh",
"id" : "20",
"image" : "logo.png",
"titulo" : "TITULO DA NOTICIA",
"usuario" : "FERNANDO PAIVA"
}
] }
You need to make another object Item and parse a list of them.
public class Item{
Noticia noticia;
}
Or you can interate through JSONArray, get field "noticia" from each then parse Noticia object from given JSONObject.
Kotlin Ex :
we getting response in form of JSONArry
call.enqueue(object : Callback<JsonArray> {
override fun onResponse(call: Call<JsonArray>, response: Response<JsonArray>) {
val list = response.body().toString()
val gson = Gson()
val obj: CitiesList? = gson.fromJson(list, CitiesList::class.java)
cityLiveData.value = obj!!
}
override fun onFailure(call: Call<JsonArray>, t: Throwable) {
}
})
Here CitiesList CitiesList::class.java is the ArrayList of Cities object
class CitiesList : ArrayList<CitiesListItem>()
Before using GSON add dependancey in Gradle
dependencies {
implementation 'com.google.code.gson:gson:2.8.8'
}