CODEWITHSUNDEEP
androidretrofit
Samuel Moshie
Samuel Moshie

Reputation: 570

Retrofit List of object assigns null to data

This is how my JSON response looks

[
  {
    "id": 1,
    "PhName": "sample string 2",
    "Longitude": 3.1,
    "Latitude": 4.1,
    "ApplicationUserId": "sample string 5"
  },
  {
    "id": 1,
    "PhName": "sample string 2",
    "Longitude": 3.1,
    "Latitude": 4.1,
    "ApplicationUserId": "sample string 5"
  }
]

this is my retrofit interface call

@GET("/api/GPS")
@Headers({
        "Accept: application/json"
})
Call<List<UserResponse>> search(@Query("search") String search,
                        @Header("Authorization") String auth);

Pojo Class

public class UserResponse {
    @SerializedName("Id")
    int id;

    @SerializedName("UserName")
    String phName;

    @SerializedName("Longitude")
    int lon;

    @SerializedName("Latitude")
    int lat;

    @SerializedName("ApplicationUserId")
    String appUserId;

//getters and setters
}

Retrofit declaration

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

Getting data and using it

MyApiEndpointInterface apiService =
                retrofit.create(MyApiEndpointInterface.class);
        Call<List<UserResponse>> call = apiService.search(query,"Bearer "+token);

        call.enqueue(new Callback<List<UserResponse>>() {
            @Override
            public void onResponse(Call<List<UserResponse>> call, Response<List<UserResponse>> response) {
                List<UserResponse> userList = response.body();
                Log.w("My App", response.message());
                for (int i = 0; i <userList.size() ; i++) {
                    Log.w("My App", userList.get(i).getPhName()+""+i);
                }



                //mAdapter = new MyAdapter(getContext(),userList);
                //mRecyclerView.setAdapter(mAdapter);
            }

            @Override
            public void onFailure(Call<List<UserResponse>> call, Throwable t) {
                Log.w("My App", t.getMessage());
            }
        });

my response 

W/My App: OK
W/My App: null 0
W/My App: null 1
W/My App: null 2
W/My App: null 3

In this case I am suppose to receive four result from the search and the names are giving me null.

Is there anything I am doing wrong or a better solution to this?

Upvotes: 0

Views: 799

Answers (2)

msal
msal

Reputation: 968

Your SerializedName fields and the JSON fields don't match.

JSON: id -> GSON: Id
JSON: PhName -> GSON: UserName

Those two don't add up. You have to alter your annotations accordingly:

@SerializedName("id")
int id;

@SerializedName("PhName")
String phName;

Upvotes: 2

Rohit5k2
Rohit5k2

Reputation: 18112

You are using wrong serialize name. You are trying to assign value from node UserName to phName, which is not available. So, you are getting null.

Change

@SerializedName("UserName")
String phName;

with 

@SerializedName("PhName") // change this
String phName;

Also, @SerializedName("Id") should be @SerializedName("id"). It's case sensitive.

Upvotes: 2

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