Parse a nested json with retrofit 2.0

Question

i have this json\'s and i want to use retrofit for parsing them.

{
  \"status\": \"true\",
  \"data\": [
{
  \"id\": \"1\",
  \"title\": \"Hi :)\",
  \"text         


        

Answer 1

I see many people face this issue so I post my own way with Retrofit here is what I've done it's so simple and clean :

create ServiceHelper Class :

public class ServiceHelper {

private static final String ENDPOINT = "http://test.com";

private static OkHttpClient httpClient = new OkHttpClient();
private static ServiceHelper instance = new ServiceHelper();
private IPlusService service;


private ServiceHelper() {

    Retrofit retrofit = createAdapter().build();
    service = retrofit.create(IPlusService.class);
}

public static ServiceHelper getInstance() {
    return instance;
}

private Retrofit.Builder createAdapter() {

    httpClient.setReadTimeout(60, TimeUnit.SECONDS);
    httpClient.setConnectTimeout(60, TimeUnit.SECONDS);
    HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
    interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
    httpClient.interceptors().add(interceptor);

    return new Retrofit.Builder()
            .baseUrl(ENDPOINT)
            .client(httpClient)
            .addConverterFactory(GsonConverterFactory.create());
}

public Call<List<CategoryModel>> getAllCategory() {
    return service.getAllCategory();
}

}

Then create your Service class in my Case it's IPlusService

    public interface IPlusService {

    @GET("/api/category")
    Call<List<CategoryModel>> getAllCategory();
}

Now in your Fragment/Activity class you call your own method with something like this :

ServiceHelper.getInstance().getAllCategory().enqueue(new Callback<List<CategoryModel>>() {
        @Override
        public void onResponse(Response<List<CategoryModel>> response, Retrofit retrofit) {
            processResponse(response);
        }

        @Override
        public void onFailure(Throwable t) {
            processResponse(null);
        }
    });

Also add following dependency to your gradle :

dependencies {

      compile 'com.squareup.retrofit:retrofit:2.0.0-beta2'
    compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2'
    compile 'com.squareup.okhttp:logging-interceptor:2.6.0'

}

Answer 2

Root node of your json is not array, but you declared it as List<responseStatus> at interface getPost. So you need to use responseStatus instead current one. And use gettter to access data

@SerializedName("data")
private ArrayList<retroPost> data;

which is array