Json object into array list with RetroFit Android

Question

I'm trying to get this data from a rest API and show on Recycler view. I try to convert my JSON Object into an ArrayList, but I don't have success. My code returns this: [] Currently, I'm using Retrofit with POJO classes.

//Header

ArrayList<Model> carsModels=new ArrayList<>();
private Adapter carsAdapter;


Retrofit retrofit=new Retrofit.Builder()
            .baseUrl("http://example.com/")
            .addConverterFactory(GsonConverterFactory.create())
            .build();

    RequestInteface requestInteface = retrofit.create(RequestInteface.class);
    Call<Model> call = requestInteface.getInteressJson();

    call.enqueue(new Callback<Model>() {
        @Override
        public void onResponse(Call<Model> call, Response<Model> response) {
            if(response.isSuccessful()){
                carsModels = new ArrayList<>(response.body().getModelList()); 
                carsAdapter = new Adapter(home.this, carsModels);
                cars_recyclerview.setAdapter(carsAdapter);
                Toast.makeText(home.this,"Success",Toast.LENGTH_SHORT).show();
            }
        }

    });

Model Class:

public class Model {
@SerializedName("name")
@Expose
private String name;
@SerializedName("audience_size")
@Expose
private String audience_size;
@SerializedName("topic")
@Expose
private String topic;
@SerializedName("path")
@Expose
private String path;
@SerializedName("description")
@Expose
private String description;

private List<Model> modelList = new ArrayList<>();


//Getter and setter

Request interface:

interface RequestInteface {
@GET("search.json")
Call<Model> getInteressJson();
}

Công Hải · Accepted Answer · 2020-06-10 11:28:21Z

1

You need parse "data" first, inside "data" contain List<Model> Create class InteressResponse

public class InteressResponse {
@SerializedName("data")
@Expose
private List<Model> modelList;

//Getter and setter
}

interface RequestInteface {
@GET("search.json")
Call<InteressResponse> getInteressJson();
}

public void onResponse(Call<InteressResponse> call, Response<InteressResponse> response) {
      if(response.isSuccessful()){
          carsModels = new ArrayList<>(response.body().getModelList()); 
          carsAdapter = new Adapter(home.this, carsModels);
          cars_recyclerview.setAdapter(carsAdapter);
          Toast.makeText(home.this,"Success",Toast.LENGTH_SHORT).show();
      }
}

Remove private List<Model> modelList = new ArrayList<>(); inside class Model

edited Jun 10, 2020 at 11:28

answered Jun 10, 2020 at 2:28

Công Hải

5,2813 gold badges17 silver badges23 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

RoktSe Over a year ago

return this error: Attempt to invoke interface method 'java.lang.Object[] java.util.Collection.toArray()' on a null object reference

Collectives™ on Stack Overflow

Json object into array list with RetroFit Android

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related