retrofit gson JsonSyntaxException parsing issue begin object

Question

Error:

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 2 column 1 path $

POJO:

LoginResponse {
    @SerializedName("status")
    private Integer status;
    @SerializedName("message")
    private String message;
    @SerializedName("data")
    private User user;
}

- Create Pojo class User details showing json object data Expected BEGIN_OBJECT but was STRING at line 2 column 1 path $

 class User {
    @SerializedName("id")
    @Expose
    private String id;
}

My Json Output like

{
    "status": 1,
    "message": "You are successfully logged in.",
    "data": {
        "id": "10",
        "email": "abcdef@gmail.com",
        "password": "3f009d72559f51e7e454b16e5d0687a1",
        "mobile": "abc@gmail.com",
        "verified_saller": "",
        "first_name": "abc@gmail.com",
        "middle_name": "abc@gmail.com",
        "last_name": "abc@gmail.com",
        "image": "",
        "default_size": "0",
        "wallet": "",
        "status": "active",
        "otp": "",
        "updated": "2017-10-28 12:22:21",
        "created": "2017-10-28 11:41:14"
    }
}

create interface for retrofit Api parsing

@POST("user/login") Call<LoginResponse> userLogIn(@Body User login);

Main Activity code below Expected BEGIN_OBJECT but was STRING at line 2 column 1 path $

APILogin service = ApiClient.getClient().create(APILogin.class); User login = new User(); login.setEmail(email); login.setPassword(password);

    Call<User> userCall = service.userLogIn(login);
    userCall.enqueue(new Callback<User>() {
        @Override
        public void onResponse(Call<User> call, Response<User> response) {
            User user = response.body();
            mRelativeLayout.setVisibility(View.GONE);
            mcardView.setVisibility(View.VISIBLE);
            //onSignupSuccess();
            Log.d("onResponse", "" + response.body().getMessage());
            if (response.body().getStatus() == 1) {
                Toast.makeText(LoginActivity.this, "" + response.body().getMessage(), Toast.LENGTH_SHORT).show();



                Intent i = new Intent(LoginActivity.this, HomeActivity.class);
                i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_CLEAR_TASK);
                startActivity(i);
                finish();
            } else {
                Toast.makeText(LoginActivity.this, "" + response.body().getMessage(), Toast.LENGTH_SHORT).show();
            }
        }

        @Override
        public void onFailure(Call<User> call, Throwable t) {
            mRelativeLayout.setVisibility(View.GONE);
            mcardView.setVisibility(View.VISIBLE);
            call.cancel();
            Toast.makeText(LoginActivity.this, "Please check your network connection and internet permission" + t.getMessage(), Toast.LENGTH_LONG).show();
            Log.d("onFailure", t.toString());
        }
    });

Possible duplicate of ["Expected BEGIN\_OBJECT but was STRING at line 1 column 1"](https://stackoverflow.com/questions/28418662/expected-begin-object-but-was-string-at-line-1-column-1) — AskNilesh, Oct 30 '17 at 05:04
see this example.https://www.androidhive.info/2016/05/android-working-with-retrofit-http-library/ — Vishal Thakkar, Oct 30 '17 at 06:16
where are you pass your username and password?? @Body User this model does not contain your username and password filed — Vishal Thakkar, Oct 30 '17 at 06:45

Zeeshan Zulfiqar · Answer 1 · 2017-10-30T06:50:00.290

Create an HttpResponseModel class as fllow.

HttpResponseModel.java

public class HttpResponseModel {

    @SerializedName("status")
    @Expose
    public int status;
    @SerializedName("msg")
    @Expose
    public String message;
    @SerializedName("data")
    @Expose
    public User user;
}

And your Retrofit onResponse will be like

 @Override
public void onResponse(Call<HttpResponseModel> call, Response<HttpResponseModel> response) {
    HttpResponseModel httpResponseModel = response.body();
    if (httpResponseModel != null) {
        if (httpResponseModel.getResponse() != null) {
            if (!httpResponseModel.getResponse().isJsonNull()) {
                    Gson gson = new Gson();
                    Type type = new TypeToken<User>() {
                    }.getType();
                    User user = gson.fromJson(httpResponseModel.getResponse(), type);

                    }
                }
            }
    }

Edited the answer. Please let me know if you still find it difficult to understand. — Zeeshan Zulfiqar, Oct 30 '17 at 06:45

score 0 · Answer 2 · answered Oct 30 '17 at 05:14

JSON string you can tell from the error message that it is not the correct structure to be parsed into your Ad class.

From your error i can tell that it is not the correct structure to be parsed into your class.

Gson is expecting your JSON string to begin with an object opening brace. e.g. { not with "

make your JSON Response with correct structure from back end

score 0 · Answer 3 · answered Oct 30 '17 at 06:53

Try like below:

@FormUrlEncoded
    @POST("user/login")
    Call<LoginResponse> userLogIn(@FieldMap Map<String, String> credentialMap);

create Map of username and password like below:

     Map<String, String> credMap = new HashMap<>();
     credMap.put("Username", "vishal.halani");
     credMap.put("Password", "vishal1212");

call like below:

 Call<LoginResponse> call = apiService.userLogIn(credMap);
call.enqueue(new Callback<LoginResponse>() {
            @Override
        public void onResponse(Call<LoginResponse> call, Response<LoginResponse> response) {


            if (response.isSuccessful()) {


LoginResponse loginResponse= ((LoginResponse) response.body());

            }



        }

        @Override
        public void onFailure(Call<LoginResponse> call, Throwable t) {
            // Log error here since request failed
            Log.e(TAG, t.toString());


        }
    });

java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 61 path $.data — pragnesh, Oct 30 '17 at 07:36
{ "status": 1, "message": "You are successfully logged in.", "data": [ ] } — pragnesh, Nov 01 '17 at 04:22

retrofit gson JsonSyntaxException parsing issue begin object

3 Answers3