Android Play Billing Library: onSkuDetailsResponse responseCode is 0, but the size of skuDetailsList is also 0

I'm now using the new Play Billing Library

Basically, I followed the documentation to query available items to purchase

 SkuDetailsParams.Builder params = SkuDetailsParams.newBuilder();
            params.setSkusList(skuList).setType(itemType);
            mBillingClient.querySkuDetailsAsync(params.build(),
                    new SkuDetailsResponseListener() {

                        @Override
                        public void onSkuDetailsResponse(int responseCode,
                                                         List<SkuDetails> skuDetailsList) {
                            listener.onSkuDetailsResponse(responseCode, skuDetailsList);
                        }

However, the responseCode is 0 and the list is also empty. But I checked onBillingSetupFinished is successful. The skuList that provided to SkuDetailsParams.Builder is not empty, and the values inside the skuList (sku_id) is also same as Product ID that specifies on Google Play Console.

Does anyone know the reason? Thanks!!

Sounds like you're having issues with your Google Play Console setup.

Please check that:

• your app is published in Play Console (to PROD or your @gmail account is in the user's alpha/beta group)
  • I also recommend adding your test @gmail account into license testers list to avoid being charged and license issues
• has correct signature and version code of test app is equal to published one
• all of your SKUs are also published
• your Play Store app works correctly on the phone you're testing (allows you to purchase apps for example)

And wait for some time after setup is done.