Unable to get Response in retrofit in call.enque()

Question

I am paring CollectionListing Api from Shopify and I need to pass 'collecton_listing_id' as parameter in url. I am passing the id but unable to get response in Callback.

Note: I have tested the api with parameters in Postman and works fine.

Here is my implementation.

ProductActivity.java

 private void processProductIds() {

    apiInterface = APIClient.getClient().create(ApiInterface.class);

    Call<List<Integer>> call = apiInterface.getProductIds(key, id);

    call.enqueue(new Callback<List<Integer>>() {
        @Override
        public void onResponse(Call<List<Integer>> call, Response<List<Integer>> response) {
            String s = String.valueOf(response.body());
            Log.d("S", "onResponse:" + s);
        }

        @Override
        public void onFailure(Call<List<Integer>> call, Throwable t) {

        }
    });
}

ApiInterface.java

public interface ApiInterface {

@GET("collection_listings/{collection_listing_id}/product_ids.json")
Call<List<Integer>> getProductIds(@Header("Authorization") String accessToken, @Path("collection_listing_id") long id);

}

Model Class

public class IdExample {

@SerializedName("product_ids")
@Expose
private List<Integer> productIds = null;

public List<Integer> getProductIds() {
    return productIds;
}

public void setProductIds(List<Integer> productIds) {
    this.productIds = productIds;
 }
}

JSON Response

{
"product_ids": [
    1331092619350,
    1331125551190,
    1331126599766,
    1331121651798
  ]
}

Thank you.

Answer 1

You need to change the return type of getProductIds from Call<List<Integer>> to Call<IdExample>

EDIT: (as discussed in the comments)

You should also change List<Integer> productIds to List<Long> productIds