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How to implelement this on retrofit?

Hello I am an android developer and i have never before faced this problem before "Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 1 column 2 path $" i am suspecting the issue is in my model.
this is the postman response as is
{
"Status": 200,
"Message": "OK",
"Data": {
"ServiceTypes": [
{
"Id": 1,
"ServiceTypeNameAr": "صيانة",
"ServiceTypeNameEn": "Maintenance",
"MainServices": [
{
"Id": 11,
"ServiceTypeId": 1,
"MainServiceNameAr": "تكييفات\r\n",
"MainServiceNameEn": "Air conditioning\r\n",
"SubServices": null
},
{
"Id": 12,
"ServiceTypeId": 1,
"MainServiceNameAr": "كهرباء\r\n",
"MainServiceNameEn": "Electricity\r\n",
"SubServices": null
},
{
"Id": 14,
"ServiceTypeId": 1,
"MainServiceNameAr": "سباكة",
"MainServiceNameEn": "Plumbing\r\n",
"SubServices": null
},
{
"Id": 15,
"ServiceTypeId": 1,
"MainServiceNameAr": "اجهزة منزلية\r\n",
"MainServiceNameEn": "Home appliances\r\n",
"SubServices": null
}
]
}
]
}
}
i want to implement this as a pojo(model) in my code this is my try (Edited)
ResponseModel
public class ResponseModel {
#SerializedName("Status")
public int Status;
#SerializedName("Message")
public String Message;
#SerializedName("Data")
public DataModel Data;
public int getStatus() {
return Status;
}
public void setStatus(int status) {
Status = status;
}
public String getMessage() {
return Message;
}
public void setMessage(String message) {
Message = message;
}
public DataModel getData() {
return Data;
}
public void setData(DataModel data) {
this.Data = data;
}
}
DataModel
public class DataModel {
#SerializedName("Country")
private List<CountryModel> countryModels;
#SerializedName("Users")
private List<UserModel> users;
#SerializedName("Cities")
private List<CityItem> cityItems;
#SerializedName("ServiceTypes")
private List<ServiceTypeModel> serviceTypeModels;
private Map<String, Object> additionalProperties = new HashMap<String,
Object>();
public List<CityItem> getCityItems() {
return cityItems;
}
public void setCityItems(List<CityItem> cityItems) {
this.cityItems = cityItems;
}
public List<UserModel> getUsers() {
return users;
}
public void setUsers(ArrayList<UserModel> users) {
this.users = users;
}
public List<CountryModel> getCountryModels() {
return countryModels;
}
public void setCountryModels(ArrayList<CountryModel> countryModels) {
this.countryModels = countryModels;
}
public List<ServiceTypeModel> getServiceTypeModels() {
return serviceTypeModels;
}
public void setServiceTypeModels(List<ServiceTypeModel> serviceTypeModels) {
this.serviceTypeModels = serviceTypeModels;
}
public void setCountryModels(List<CountryModel> countryModels) {
this.countryModels = countryModels;
}
public void setUsers(List<UserModel> users) {
this.users = users;
}
public Map<String, Object> getAdditionalProperties() {
return additionalProperties;
}
public void setAdditionalProperties(Map<String, Object> additionalProperties) {
this.additionalProperties = additionalProperties;
}
}
ServiceTypeModel
public class ServiceTypeModel {
#SerializedName("Id")
private int id;
#SerializedName("ServiceTypeNameAr")
private String serviceTypeNameAr;
#SerializedName("ServiceTypeNameEn")
private String serviceTypeNameEn;
#SerializedName("MainServices")
private List<MainServicesModel> mainServicesList;
public List<MainServicesModel> getMainServicesList() {
return mainServicesList;
}
public void setMainServicesList(List<MainServicesModel> mainServicesList) {
this.mainServicesList = mainServicesList;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getServiceTypeNameAr() {
return serviceTypeNameAr;
}
public void setServiceTypeNameAr(String serviceTypeNameAr) {
this.serviceTypeNameAr = serviceTypeNameAr;
}
public String getServiceTypeNameEn() {
return serviceTypeNameEn;
}
public void setServiceTypeNameEn(String serviceTypeNameEn) {
this.serviceTypeNameEn = serviceTypeNameEn;
}
}
The Interface:
public interface ServiceTypeInterface {
#GET("ServiceType")
public Call<ResponseModel> GetServicesType(#Header("authorization") String token);
#GET("ServiceType/{id}")
public Call<ResponseModel> GetServiceTypeById(#Path("id") int Id, #Header("authorization") String token);
}
Adapter
public class ServiceTypeAdapter extends RecyclerView.Adapter<ServiceTypeAdapter.ServiceTypeHolder> {
private List<ResponseModel> serviceTypeModels = new ArrayList<>();
private final ServiceTypeListener listener;
private Context context;
public ServiceTypeAdapter(ServiceTypeListener listener, Context context, List<ResponseModel> serviceTypeList) {
this.listener = listener;
this.context = context;
this.serviceTypeModels = serviceTypeList;
}
#NonNull
#Override
public ServiceTypeHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_sub_service, parent, false);
return new ServiceTypeHolder(itemView);
}
#Override
public void onBindViewHolder(#NonNull ServiceTypeHolder holder, int position) {
final ResponseModel ServiceType = serviceTypeModels.get(position);
holder.TxtServiceTypeName.setText(ServiceType.getData().getServiceTypeModels().get(0).getServiceTypeNameEn());
}
#Override
public int getItemCount() {
return serviceTypeModels.size();
}
public long getItemId(int position) {
return position;
}
public void setList(List<ResponseModel> serviceTypeModels) {
// serviceTypeModels = new List<ResponseModel>(serviceTypeModels.get(0).getData().getServiceTypeModels().get(0).getServiceTypeNameEn());
this.serviceTypeModels = serviceTypeModels;
notifyDataSetChanged();
}
public class ServiceTypeHolder extends RecyclerView.ViewHolder {
TextView TxtServiceTypeName;
public ServiceTypeHolder(#NonNull View itemView) {
super(itemView);
TxtServiceTypeName = itemView.findViewById(R.id.ServiceTypeName);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
listener.onServiceTypeSelected(serviceTypeModels.get(getAdapterPosition()));
}
});
}
}
public interface ServiceTypeListener {
void onServiceTypeSelected(ResponseModel serviceTypeModel);
}
}
i tried to separate them as well into two models the status, message and data which calls for the services type which is in another model.
if anything else or more clarification is needed pls don't hesitate to ask me for code or anything.
any help is really appreciated.
Thanks in advance.

you may implement pojo as this:
this class represent the top level object:
public class ResponseModel {
private Integer Status;
private String Message;
private DataModel Data;
// getters, setters, constructors
}
this class represents Data class:
public class DataModel {
private List<ServiceTypeModel> ServiceTypes;
// getters, setters, constructors
}
and this class maps with ServiceTypes
public class ServiceTypeModel {
private Long Id;
private String ServiceTypeNameAr;
private String ServiceTypeNameEn;
private List<MainServiceModel> MainServices;
// getters, setters, constructors
}
And finally this class maps with MainServices
public class MainServiceModel{
private Long Id;
private Long ServiceTypeId;
private String MainServiceNameAr;
private String MainServiceNameEn;
private List<SubServiceModel> SubServices;
// getters, setters, constructors
}
for SubServices, you have provided null so I imagine this is a List of SubServiceModel. You can implement this class like how I did for the others.
Also you can use some online tools to generate pojo of a json like this

I think the problem is with your ServiceTypeWebEntity model where you set data as a list but it's an object which has ServiceTypes key with List<ServiceTypeModel> inside, so you can try this model.
public class ServiceTypeWebEntity {
#SerializedName("Status")
private int Status;
#SerializedName("Message")
private String Message;
#SerializedName("data")
public ServiceTypes ServicesType;
public int getStatus() {
return Status;
}
public void setStatus(int status) {
Status = status;
}
public String getMessage() {
return Message;
}
public void setMessage(String message) {
Message = message;
}
public ServiceTypes getServicesType() {
return ServicesType;
}
public void setServicesType(ServiceTypes servicesType) {
ServicesType = servicesType;
}
public class ServiceTypes{
#SerializedName("ServiceTypes")
public List<ServiceTypeModel> ServicesType;
public List<ServiceTypeModel> getServicesType() {
return ServicesType;
}
public void setServicesType(List<ServiceTypeModel> servicesType) {
ServicesType = servicesType;
}
}
public class ServiceTypeModel {
#SerializedName("Id")
private int id;
#SerializedName("ServiceTypeNameAr")
private String serviceTypeNameAr;
#SerializedName("ServiceTypeNameEn")
private String serviceTypeNameEn;
#SerializedName("MainServices")
private List<MainServicesModel> mainServicesList;
public List<MainServicesModel> getMainServicesList() {
return mainServicesList;
}
public void setMainServicesList(List<MainServicesModel> mainServicesList) {
this.mainServicesList = mainServicesList;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getServiceTypeNameAr() {
return serviceTypeNameAr;
}
public void setServiceTypeNameAr(String serviceTypeNameAr) {
this.serviceTypeNameAr = serviceTypeNameAr;
}
public String getServiceTypeNameEn() {
return serviceTypeNameEn;
}
public void setServiceTypeNameEn(String serviceTypeNameEn) {
this.serviceTypeNameEn = serviceTypeNameEn;
}
}
}
hope it helps.

I knew where i was wrong i was missing a small part in my main for calling the list itself here is the main for anyone who needs it or anyone facing the same issue
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_categories);
//
TestTxt = findViewById(R.id.TestTxt);
serviceTypeViewModel = ViewModelProviders.of(this).get(ServiceTypeViewModel.class);
serviceTypeViewModel.GetServiceType();
serviceTypeRecycler = findViewById(R.id.ServiceTypeRV);
// LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
// serviceTypeRecycler.setLayoutManager(layoutManager);
// serviceTypeRecycler.setItemAnimator(new DefaultItemAnimator());
// serviceTypeRecycler.setAdapter(serviceTypeAdapter);
FillListServices();
}
private void FillListServices() {
serviceTypeViewModel.ServiceTypeMutableLiveData.observe(this, new Observer<ResponseModel>() {
// Here i was trying to call the ServiceTypeModel instead
#Override
public void onChanged(ResponseModel responseModel) {
Utilities.dismissLoadingDialog();
serviceTypeModelArrayList = new ArrayList<>();
serviceTypeModelArrayList = responseModel.getData().getServiceTypeModels();
TestTxt.setText(responseModel.getData().getServiceTypeModels().get(0).getServiceTypeNameAr());
serviceTypeAdapter = new ServiceTypeAdapter(responseModel.getData().getServiceTypeModels());
LinearLayoutManager layoutManager = new LinearLayoutManager(MainCategories.this, LinearLayoutManager.HORIZONTAL, false);
serviceTypeRecycler.setLayoutManager(layoutManager);
serviceTypeRecycler.setAdapter(serviceTypeAdapter);
}
});
}

Cannot get value from nested json retrofit android studio

I want to get the value from the nested json and using retrofit. The value for both LicenseCDL and LicenseVDL classes are null. How to get the data from both array? Where did I missing from the java class?
This is the Json looks like.
{
"data": {
"LicenseCDL": [
{
"class_code": "B2",
"invoice_num": "W1007INV20051",
"total": "1484.00",
"created_at": "2020-05-18 08:56:13"
}
],
"LicenseVDL": [
{
"class_code": "PSV VAN",
"invoice_num": "W1007INV20052",
"total": "583.00",
"created_at": "2020-05-18 10:12:13"
}
]
},
"status": "1",
"message": "record found."
}
This is LicenseClassModel
public class LicenseClassModel {
#SerializedName("LicenseCDL")
private List<LicenseCDL> LicenseCDL;
#SerializedName("LicenseVDL")
private List<LicenseVDL> LicenseVDL;
#SerializedName("message")
private String message;
#SerializedName("status")
private String status;
public List<LicenseClassModel.LicenseCDL> getLicenseCDL() {
return LicenseCDL;
}
public List<LicenseClassModel.LicenseVDL> getLicenseVDL() {
return LicenseVDL;
}
public String getMessage() {
return message;
}
public String getStatus() {
return status;
}
public static class LicenseCDL {
#SerializedName("class_code")
private String classCode;
#SerializedName("data")
private List<LicenseDataItem> data;
public String getClassCode() {
return classCode;
}
public List<LicenseDataItem> getData() {
return data;
}
}
public static class LicenseVDL {
#SerializedName("class_code")
private String classCode;
#SerializedName("data")
private List<LicenseDataItem> data;
public String getClassCode() {
return classCode;
}
public List<LicenseDataItem> getData() {
return data;
}
}
This is method that I want to get the value
private void callLicenseApi() {
Call<LicenseClassModel> CheckCall = apiInterface.LICENSE_CLASS_LIST_CALL(String.valueOf(UserData.getId()));
CheckCall.enqueue(new Callback<LicenseClassModel>() {
#Override
public void onResponse(#NonNull Call<LicenseClassModel> call, #NonNull Response<LicenseClassModel> response) {
Log.i("???","value cdl: " + response.body().getLicenseCDL()); //output: value cdl: null
Log.i("???","value vdl: " + response.body().getLicenseVDL()); //output: value cdl: null
}
#Override
public void onFailure(Call<LicenseClassModel> call, Throwable t) {
Log.i("???","Erorr : " + t.getMessage());
}
});
}

LicenseCDL and LicenseVDL are inside "data" key So you need to Update the Classes
public class LicenseClassModel {
#SerializedName("data")
#Expose
private Data data;
#SerializedName("status")
#Expose
private String status;
#SerializedName("message")
#Expose
private String message;
public Data getData() {
return data;
}
public void setData(Data data) {
this.data = data;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
public class Data {
#SerializedName("LicenseCDL")
#Expose
private List<LicenseCDL> licenseCDL = null;
#SerializedName("LicenseVDL")
#Expose
private List<LicenseVDL> licenseVDL = null;
public List<LicenseCDL> getLicenseCDL() {
return licenseCDL;
}
public void setLicenseCDL(List<LicenseCDL> licenseCDL) {
this.licenseCDL = licenseCDL;
}
public List<LicenseVDL> getLicenseVDL() {
return licenseVDL;
}
public void setLicenseVDL(List<LicenseVDL> licenseVDL) {
this.licenseVDL = licenseVDL;
}
}

I solved this by changing the model class to this.
public class LicenseClassModel {
#SerializedName("data")
private LicensePerantaraan data;
#SerializedName("message")
private String message;
#SerializedName("status")
private String status;
public LicensePerantaraan getData() {
return data;
}
public String getMessage() {
return message;
}
public String getStatus() {
return status;
}
public static class LicensePerantaraan {
#SerializedName("LicenseCDL")
private List<LicenseDataItem> LicenseCDL;
#SerializedName("LicenseVDL")
private List<LicenseDataItem> LicenseVDL;
public List<LicenseClassModel.LicenseDataItem> getLicenseCDL() {
return LicenseCDL;
}
public List<LicenseClassModel.LicenseDataItem> getLicenseVDL() {
return LicenseVDL;
}
}
public static class LicenseDataItem {
#SerializedName("class_code")
private String classCode;
#SerializedName("invoice_num")
private String invoiceNum;
#SerializedName("total")
private double total;
#SerializedName("created_at")
private String createdAt;
public String getClassCode() {
return classCode;
}
public String getInvoiceNum() {
return invoiceNum;
}
public double getTotal() {
return total;
}
public String getCreatedAt() {
return createdAt;
}
}
}
And after that I call this method in the adapter. Using the array and using method addAll, before using that method, clear the array 1st.
private void callLicenseApi() {
licenseDataItemArrayList.clear();
Call<LicenseClassModel> CheckCall = apiInterface.LICENSE_CLASS_LIST_CALL(String.valueOf(UserData.getId()));
CheckCall.enqueue(new Callback<LicenseClassModel>() {
#Override
public void onResponse(#NonNull Call<LicenseClassModel> call, #NonNull Response<LicenseClassModel> response) {
if (response.code() == 200) {
if (response.body() != null)
if (response.body().getStatus().equals("1")) {
if (response.body().getData().getLicenseCDL().size() != 0) {
licenseDataItemArrayList.addAll(response.body().getData().getLicenseCDL());
licenseDataItemArrayList.addAll(response.body().getData().getLicenseVDL());
licenseClassAdapter = new LicenseClassAdapter(con, licenseDataItemArrayList, new RecyclerViewBaseAdapter.ItemSelectedListener<LicenseClassModel.LicenseDataItem>() {
#Override
public void onItemSelected(LicenseClassModel.LicenseDataItem listItem) {
}
});
tvNoRecordFound.setVisibility(View.GONE);
rv.setVisibility(View.VISIBLE);
rv.setLayoutManager(new LinearLayoutManager(con));
rv.setAdapter(licenseClassAdapter);
} else {
rv.setVisibility(View.GONE);
tvNoRecordFound.setVisibility(View.VISIBLE);
}
} else {
Toast.makeText(con, getString(R.string.record_not_found), Toast.LENGTH_SHORT).show();
tvNoRecordFound.setVisibility(View.VISIBLE);
}
} else {
Toast.makeText(con, getString(R.string.record_not_found), Toast.LENGTH_SHORT).show();
tvNoRecordFound.setVisibility(View.VISIBLE);
}
lytProgress.setVisibility(View.GONE);
}
#Override
public void onFailure(Call<LicenseClassModel> call, Throwable t) {
callAPiForLog(TAG, t.getMessage());
Toast.makeText(con, t.getMessage(), Toast.LENGTH_SHORT).show();
}
});
}

Mapping a nested JSON response obtained using RxJava and Retrofit

I starting out with RxJava and Retrofit and wanted to create a simple app to show a list of 100 cryptocurrencies.
I am making an api call which results in something like this :
{
"Response": "Success",
"Message": "Coin list succesfully returned!",
"BaseImageUrl": "https://www.cryptocompare.com",
"BaseLinkUrl": "https://www.cryptocompare.com",
"Data": {
"LTC": {
"Id": "3808",
"Url": "/coins/ltc/overview",
"ImageUrl": "/media/19782/ltc.png",
"Name": "LTC",
"CoinName": "Litecoin",
"FullName": "Litecoin (LTC)",
"Algorithm": "Scrypt",
"ProofType": "PoW",
"SortOrder": "2"
}
...
},
"Type": 100
}
But all I want from this is "Response" and "Data". Since it is not practical to create a 100 different model classes for each coin, I want to store information of all the coins in a common class named Coin which would look something like this :
public class Coins {
#SerializedName("Algorithm")
private String mAlgorithm;
#SerializedName("CoinName")
private String mCoinName;
#SerializedName("FullName")
private String mFullName;
#SerializedName("FullyPremined")
private String mFullyPremined;
#SerializedName("Id")
private String mId;
#SerializedName("ImageUrl")
private String mImageUrl;
#SerializedName("Name")
private String mName;
#SerializedName("PreMinedValue")
private String mPreMinedValue;
#SerializedName("ProofType")
private String mProofType;
#SerializedName("SortOrder")
private String mSortOrder;
#SerializedName("Sponsored")
private Boolean mSponsored;
#SerializedName("Symbol")
private String mSymbol;
#SerializedName("TotalCoinSupply")
private String mTotalCoinSupply;
#SerializedName("TotalCoinsFreeFloat")
private String mTotalCoinsFreeFloat;
#SerializedName("Url")
private String mUrl;
public String getAlgorithm() {
return mAlgorithm;
}
public void setAlgorithm(String Algorithm) {
mAlgorithm = Algorithm;
}
public String getCoinName() {
return mCoinName;
}
public void setCoinName(String CoinName) {
mCoinName = CoinName;
}
public String getFullName() {
return mFullName;
}
public void setFullName(String FullName) {
mFullName = FullName;
}
public String getFullyPremined() {
return mFullyPremined;
}
public void setFullyPremined(String FullyPremined) {
mFullyPremined = FullyPremined;
}
public String getId() {
return mId;
}
public void setId(String Id) {
mId = Id;
}
public String getImageUrl() {
return mImageUrl;
}
public void setImageUrl(String ImageUrl) {
mImageUrl = ImageUrl;
}
public String getName() {
return mName;
}
public void setName(String Name) {
mName = Name;
}
public String getPreMinedValue() {
return mPreMinedValue;
}
public void setPreMinedValue(String PreMinedValue) {
mPreMinedValue = PreMinedValue;
}
public String getProofType() {
return mProofType;
}
public void setProofType(String ProofType) {
mProofType = ProofType;
}
public String getSortOrder() {
return mSortOrder;
}
public void setSortOrder(String SortOrder) {
mSortOrder = SortOrder;
}
public Boolean getSponsored() {
return mSponsored;
}
public void setSponsored(Boolean Sponsored) {
mSponsored = Sponsored;
}
public String getSymbol() {
return mSymbol;
}
public void setSymbol(String Symbol) {
mSymbol = Symbol;
}
public String getTotalCoinSupply() {
return mTotalCoinSupply;
}
public void setTotalCoinSupply(String TotalCoinSupply) {
mTotalCoinSupply = TotalCoinSupply;
}
public String getTotalCoinsFreeFloat() {
return mTotalCoinsFreeFloat;
}
public void setTotalCoinsFreeFloat(String TotalCoinsFreeFloat) {
mTotalCoinsFreeFloat = TotalCoinsFreeFloat;
}
public String getUrl() {
return mUrl;
}
public void setUrl(String Url) {
mUrl = Url;
}
}
So finally my mapped response class would look like :
public class CoinsListResponse {
private boolean success;
private List<Coins> coinsList;
public boolean isSuccess() {
return success;
}
public void setSuccess(boolean success) {
this.success = success;
}
public List<Coins> getCoinsList() {
return coinsList;
}
public void setCoinsList(List<Coins> coinsList) {
this.coinsList = coinsList;
}
}
I haven't added #Serialized notations because I don't know what key to annotate it with.
My Retrofit service interface has a method to return the results to this map :
public interface CoinService {
#NonNull
#POST
Observable<CoinsListResponse> getCoinList();
}
Since, I am a starter with Retrofit and RxAndroid, there might be a better method to do this, which I am not aware of. If so, please mention that as well !! I am trying to get my head around this for days but couldn't find any answer on SO as well.
Please Help !!

Change
private List<Coins> coinsList;
to
#SerializedName("Data")
private Map<String, Coins> coinsByName;
You can then either just use coinsByName.values() or call e.g. coinsByName.get("LTC")

How to make parse object to json using retrofit [duplicate]

This question already has answers here:
Why does Gson fromJson throw a JsonSyntaxException: Expected BEGIN_OBJECT but was BEGIN_ARRAY?
(2 answers)
Closed 5 years ago.
with the next problem, when trying to consume a webservice, then message and presentation;
Expected BEGIN_ARRAY but was BEGIN_OBJECT
I'm not sure how to make a scenario, I've already got data from a webservice, but when it's not a simple array.
I have tried many alternatives, but without success.
response api
{
"_links": {
"self": {
"href": "http://url.com/service?page=1"
},
"first": {
"href": "http://url.com/service"
},
"last": {
"href": "http://url.com/service?page=1"
}
},
"_embedded": {
"data": [
{
"id": 1,
"nome": "teste",
"_links": {
"self": {
"href": "http://url.com/service/1"
}
}
},
{
"id": 2,
"nome": "teste 2",
"_links": {
"self": {
"href": "http://url.com/service/2"
}
}
}
]
},
"page_count": 1,
"page_size": 25,
"total_items": 2,
"page": 1
}
Client
public class ApiClient {
private static final String BASE_URL = "http://url.com/";
private static Retrofit getClient() {
HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();
Gson gson = new GsonBuilder().setLenient().create();
return new Retrofit.Builder()
.baseUrl(BASE_URL)
.client(client)
.addConverterFactory(GsonConverterFactory.create(gson))
.build();
}
/**
* Get API Service
*
* #return API Service
*/
public static ApiInterface getApiService() {
return getClient().create(ApiInterface.class);
}
}
Interface
/**
* Class ApiInterface
*/
public interface ApiInterface
{
#Headers("Accept: application/json")
#GET("/service")
Call<ArrayList<ServiceData>> getData();
}
Service
public class Service{
#SerializedName("data")
private ArrayList<ServiceData> service = new ArrayList<>();
}
Service Data
public class ServiceData {
#SerializedName("id")
private int id;
public ServiceData(int id, String nome) {
this.id = id;
}
public int getId() {
return id;
}
}
Activity
final Call<ArrayList<ServiceData>> service = apiService.getService();
service.enqueue(new Callback<ArrayList<ServiceData>>() {
#Override
public void onResponse(Call<ArrayList<ServiceData>> call, Response<ArrayList<ServiceData>> response) {
Log.e(TAG, "" + response.body());
}
#Override
public void onFailure(Call<ArrayList<ServiceData>> call, Throwable t) {
Log.e(TAG, "" + t);
}
});

You were in the right path but the response is the whole json and not only the data part you want.
I would create the ResponseApi class:
public class ResponseApi {
#SerializedName("_embedded")
private Service embedded;
}
And change on ApiInterface:
Call<ArrayList<ServiceData>> getData();
To:
Call<ResponseApi> getData();
Also in your activity replace all ArrayList<ServiceData> with ResponseApi.
With only this changes your code should work. And then you'll need to add getters in ResponseApi and Service to access the saved data.
UPDATE adding some getters:
We need the possibility to get the ArrayList of ServiceData of services:
public class Service {
// Your current code
public List<ServiceData> getServices() {
return service;
}
}
And also we could create a getter in ResponseApi to get embedded getEmbedded (I'll add the code as info only) but since we only want the services we could create a getter to the list of services getEmbededServices and use this last method.
public class ResponseApi {
// Your current code
public Service getEmbedded() { // Not used, only shown as info
return embedded;
}
public List<ServiceData> getEmbeddedServices() {
return embedded.getServices();
}
}
This way, when you'll receive a ResponseApi object in the onResponse method you can call its getEmbeddedServices to get the List of ServiceData and then you can loop through them to get the ids:
#Override
public void onResponse(Call<ResponseApi> call, Response<ResponseApi> response) {
Log.d(TAG, "services: " + response.getEmbeddedServices());
// Here you can loop the response.getEmbeddedServices() which is a List of ServiceData and get each of the ids. Ex:
for (ServiceData serviceData : response.getEmbeddedServices()) {
Log.d(TAG, "service Id: " + serviceData.getId());
// Here you have access to the ids and can do whatever you need with them.
}
}
By the way, only as a suggestion, I would rename (with refactor in Android Studio) this service var (in Service class):
private ArrayList<ServiceData> service = new ArrayList<>();
To servicesList:
private ArrayList<ServiceData> servicesList = new ArrayList<>();
And maybe also refactor the Service class to ServicesList class.
It's going to work either you rename them or not but, in my opinion, the code is more readable this way.

Try this
Your Parsing mapping has issues try below Model
ServiceData.java
public class ServiceData {
#SerializedName("_links")
#Expose
private Links links;
#SerializedName("_embedded")
#Expose
private Embedded embedded;
#SerializedName("page_count")
#Expose
private Integer pageCount;
#SerializedName("page_size")
#Expose
private Integer pageSize;
#SerializedName("total_items")
#Expose
private Integer totalItems;
#SerializedName("page")
#Expose
private Integer page;
public Links getLinks() {
return links;
}
public void setLinks(Links links) {
this.links = links;
}
public Embedded getEmbedded() {
return embedded;
}
public void setEmbedded(Embedded embedded) {
this.embedded = embedded;
}
public Integer getPageCount() {
return pageCount;
}
public void setPageCount(Integer pageCount) {
this.pageCount = pageCount;
}
public Integer getPageSize() {
return pageSize;
}
public void setPageSize(Integer pageSize) {
this.pageSize = pageSize;
}
public Integer getTotalItems() {
return totalItems;
}
public void setTotalItems(Integer totalItems) {
this.totalItems = totalItems;
}
public Integer getPage() {
return page;
}
public void setPage(Integer page) {
this.page = page;
}
}
Self_.java
public class Self_ {
#SerializedName("href")
#Expose
private String href;
public String getHref() {
return href;
}
public void setHref(String href) {
this.href = href;
}
}
Self.java
public class Self {
#SerializedName("href")
#Expose
private String href;
public String getHref() {
return href;
}
public void setHref(String href) {
this.href = href;
}
}
Links_.java
public class Links_ {
#SerializedName("self")
#Expose
private Self_ self;
public Self_ getSelf() {
return self;
}
public void setSelf(Self_ self) {
this.self = self;
}
}
Links.java
public class Links {
#SerializedName("self")
#Expose
private Self self;
#SerializedName("first")
#Expose
private First first;
#SerializedName("last")
#Expose
private Last last;
public Self getSelf() {
return self;
}
public void setSelf(Self self) {
this.self = self;
}
public First getFirst() {
return first;
}
public void setFirst(First first) {
this.first = first;
}
public Last getLast() {
return last;
}
public void setLast(Last last) {
this.last = last;
}
}
Last.java
public class Last {
#SerializedName("href")
#Expose
private String href;
public String getHref() {
return href;
}
public void setHref(String href) {
this.href = href;
}
}
First.java
public class First {
#SerializedName("href")
#Expose
private String href;
public String getHref() {
return href;
}
public void setHref(String href) {
this.href = href;
}
}
Embedded.java
public class Embedded {
#SerializedName("data")
#Expose
private List<Datum> data = null;
public List<Datum> getData() {
return data;
}
public void setData(List<Datum> data) {
this.data = data;
}
}
Datum.java
public class Datum {
#SerializedName("id")
#Expose
private Integer id;
#SerializedName("nome")
#Expose
private String nome;
#SerializedName("_links")
#Expose
private Links_ links;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getNome() {
return nome;
}
public void setNome(String nome) {
this.nome = nome;
}
public Links_ getLinks() {
return links;
}
public void setLinks(Links_ links) {
this.links = links;
}
}

Try to remove ArrayList from every where and direct use ServiceData
Interface
/**
* Class ApiInterface
*/
public interface ApiInterface
{
#Headers("Accept: application/json")
#GET("/service")
Call<ServiceData> getData();
}
Service Data
public class ServiceData {
#SerializedName("id")
private int id;
public ServiceData(int id, String nome) {
this.id = id;
}
public int getId() {
return id;
}
}
Activity
final Call<ServiceData> service = apiService.getService();
service.enqueue(new Callback<ServiceData>() {
#Override
public void onResponse(Call<ServiceData> call, Response<ServiceData> response) {
Log.e(TAG, "" + response.body());
}
#Override
public void onFailure(Call<ServiceData> call, Throwable t) {
Log.e(TAG, "" + t);
}
});

You call and waiting for List. Call<ArrayList<ServiceData>>
But in the response, you have an object.
[...] - is array (list)
{...} - is object
You need to create classes for all parameters properly.
Just try to look at this service (or similar):
http://www.jsonschema2pojo.org/
Or Android Studio (IDEA) also has a plugin (GsonFormat) for converting JSON.

Create json object using java

I have tried several ways to create follwing format json using java. (Gson , Jackson , ...)
{
"outbound": {
"address": [
"t91",
"t0992"
],
"send": "t678",
"outMessage": {
"message": "Hello World"
},
"client": "156",
"receipt": {
"URL": "http://example.com/Delivery",
"callback": "some-to-the-request"
},
"senderName": "Inc."
}
}
Any help?

Use code below.
Create POJO
public class TestPojo {
private Outbound outbound;
public Outbound getOutbound() {
return outbound;
}
public void setOutbound(Outbound outbound) {
this.outbound = outbound;
}
}
class Outbound {
private String[] address;
private String send;
private OutMessage outMessage;
private Receipt receipt;
private String senderName;
public String[] getAddress() {
return address;
}
public void setAddress(String[] address) {
this.address = address;
}
public String getSend() {
return send;
}
public void setSend(String send) {
this.send = send;
}
public OutMessage getOutMessage() {
return outMessage;
}
public void setOutMessage(OutMessage outMessage) {
this.outMessage = outMessage;
}
public Receipt getReceipt() {
return receipt;
}
public void setReceipt(Receipt receipt) {
this.receipt = receipt;
}
public String getSenderName() {
return senderName;
}
public void setSenderName(String senderName) {
this.senderName = senderName;
}
}
class OutMessage {
private String message;
public OutMessage(String message) {
super();
this.message = message;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
}
class Receipt {
private String URL;
private String callback;
public Receipt(String uRL, String callback) {
super();
URL = uRL;
this.callback = callback;
}
public String getURL() {
return URL;
}
public void setURL(String uRL) {
URL = uRL;
}
public String getCallback() {
return callback;
}
public void setCallback(String callback) {
this.callback = callback;
}
}
Main Class (JSON to Object)
String json = "{'outbound':{'address':['t91','t0992'],'send':'t678','outMessage':{'message':'Hello World'},'receipt':{'URL':'http://example.com/Delivery','callback':'some-to-the-request'},'senderName':'Inc.'}}";
TestPojo testPojo = new Gson().fromJson(json, TestPojo.class);
System.out.println(testPojo.getOutbound().getSenderName());
Output
Inc.
Main Class (Object to JSON)
TestPojo testPojo = new TestPojo();
Outbound outbound = new Outbound();
outbound.setAddress(new String[]{"t91", "t0992"});
outbound.setOutMessage(new OutMessage("Hello World"));
outbound.setReceipt(new Receipt("http://example.com/Delivery", "some-to-the-request"));
outbound.setSenderName("Inc.");
outbound.setSend("t678");
testPojo.setOutbound(outbound);
System.out.println(new Gson().toJson(testPojo));
Output
{"outbound":{"address":["t91","t0992"],"send":"t678","outMessage":{"message":"Hello World"},"receipt":{"URL":"http://example.com/Delivery","callback":"some-to-the-request"},"senderName":"Inc."}}
Detail
Used GSON library.
Used a json given by you.