Retrofit - Android - Expected BEGIN_ARRAY but was BEGIN_OBJECT

Question

I am trying to parse following JSON data using Retrofit { "message": false, "suggestions": false, "vehicle": { "parked": true, "uin": "15", "vin": "WBAEG1312MCB42267", "make": "Bmw", "model": "E8SERIES", "color": "Blue", "year": "1991", "package": "Premium", "options": "", "interior": "Color: Cream, Type:Leather", "exterior": "", "activity": "Parked", "username": "Dhruba Sarma", "timestamp": "04-Sep, 00:35", "latlng": { "lat": 12.899270164792, "lng": 77.646080134509 } } }

I have created my model classes as follows - VehicleModel.java

`public class VehicleModel {

@SerializedName("message")
@Expose
private Boolean message;
@SerializedName("suggestions")
@Expose
private Boolean suggestions;
@SerializedName("vehicle")
@Expose
private Vehicle vehicle;

public Boolean getMessage() {
    return message;
}

public Boolean getSuggestions() {
    return suggestions;
}

public Vehicle getVehicle() {
    return vehicle;
}

Vehicle.java `public class Vehicle {

@SerializedName("parked")
@Expose
private Boolean parked;
@SerializedName("uin")
@Expose
private String uin;
@SerializedName("vin")
@Expose
private String vin;
@SerializedName("make")
@Expose
private String make;
@SerializedName("model")
@Expose
private String model;
@SerializedName("color")
@Expose
private String color;
@SerializedName("year")
@Expose
private String year;
@SerializedName("package")
@Expose
private String _package;
@SerializedName("options")
@Expose
private String options;
@SerializedName("interior")
@Expose
private String interior;
@SerializedName("exterior")
@Expose
private String exterior;
@SerializedName("activity")
@Expose
private String activity;
@SerializedName("username")
@Expose
private String username;
@SerializedName("timestamp")
@Expose
private String timestamp;
@SerializedName("latlng")
@Expose
private LatLng latlng;



public Boolean getParked() {
    return parked;
}

public String getUin() {
    return uin;
}

public String getVin() {
    return vin;
}

public String getMake() {
    return make;
}

public String getModel() {
    return model;
}

public String getColor() {
    return color;
}

public String getYear() {
    return year;
}

public String getPackage() {
    return _package;
}

public String getOptions() {
    return options;
}

public String getInterior() {
    return interior;
}

public String getExterior() {
    return exterior;
}

public String getActivity() {
    return activity;
}

public String getUsername() {
    return username;
}

public String getTimestamp() {
    return timestamp;
}

public LatLng getLatlng() {
    return latlng;
}

}`

And finally LatLng.java `public class LatLng {

@SerializedName("lat")
@Expose
private Double lat;
@SerializedName("lng")
@Expose
private Double lng;

public Double getLat() {
    return lat;
}

public Double getLng() {
    return lng;
}

I even tried using jsonschema2pojo for reference. But i still get the below error com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was BEGIN_OBJECT

Please suggest what am i doing wrong ?

EDIT- Here is how i am parsing JSON

Retrofit retrofit = new Retrofit.Builder().baseUrl(baseUrl)
            .addConverterFactory(GsonConverterFactory.create()).build();

    VehicleRequestInterface request = retrofit.create(VehicleRequestInterface.class);
    Call<VehicleJSONResponse> call = request.getVehicleJSON(url);
    call.enqueue(new Callback<VehicleJSONResponse>() {
        @Override
        public void onResponse(Call<VehicleJSONResponse> call, Response<VehicleJSONResponse> response) {

            VehicleJSONResponse jsonResponse = response.body();
            vehicleData = new ArrayList<>(Arrays.asList(jsonResponse.getVehicle()));

According to your error message, you're trying to parse an object as an array. You haven't actually shown us the code where you try to parse the json, so it's hard to know what you're doing wrong. — azurefrog, Sep 13 '16 at 16:52
Show the declaration of vehicleData . How did you declare that ? — Mithun Sarker Shuvro, Sep 13 '16 at 17:04

score 0 · Accepted Answer · answered Sep 13 '16 at 17:09

0

Declare your vehicleData variable like this .

ArrayList<VehicleModel> vehicleData = new ArrayList<VehicleModel>();

And then in onResponse rather than

vehicleData = new ArrayList<>(Arrays.asList(jsonResponse.getVehicle()));

add like this way

vehicleData.add(jsonResponse.getVehicle())

The problem is you have no arrays in your json

answered Sep 13 '16 at 17:09

Mithun Sarker Shuvro

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now i am getting NullPointerException when i try to retrieve the data. `vehicleData.get(0).getVehicle().getLatlng().getLat();` – sumesh Sep 13 '16 at 18:14
Can you read the other value like vehicleData.get(0).getVehicle().getMake() ; – Mithun Sarker Shuvro Sep 13 '16 at 18:28
Nope. I tried it, but same result. I have also checked that `vehicleData` is not null. Not sure what the issue is here. – sumesh Sep 13 '16 at 18:29
`vehicleData.get(0).getVehicle()` is null. Not sure why !! Could u help – sumesh Sep 14 '16 at 06:35
debug vehicleData , lets check if u get something – Mithun Sarker Shuvro Sep 14 '16 at 17:09
i am getting `vehicleData={VehicleModel@6641}` `message=false` `suggestions=false` `vehicle=null` What next ?? – sumesh Sep 14 '16 at 18:27
try calling your api in postman , just check your api response correctly – Mithun Sarker Shuvro Sep 14 '16 at 18:31
i have already checked it on postman. The response is as expected. For your reference VehicleJSONResponse.jave looks like this `public class VehicleJSONResponse { private VehicleModel vehicle; public VehicleModel getVehicleJSONResponse() { return vehicle; } }` FYI i am now retrieving the data like this `vehicleData.getVehicle().getColor()` – sumesh Sep 14 '16 at 18:34

Retrofit - Android - Expected BEGIN_ARRAY but was BEGIN_OBJECT

1 Answers1