According to the documentation of Android billing library v4.0+, google has added the ability to purchase multi-quantity of an item.

I enabled the option in Play Console: https://i.stack.imgur.com/OQ6OA.png

But unfortunately the dialog won't allow me to select quantity:


the invoking code looks like this:

                new SkuDetailsResponseListener() {
                    public void onSkuDetailsResponse(BillingResult billingResult,
                                                     List<SkuDetails> skuDetailsList) {
                        Log.d(TAG, "billingDebug: size" + skuDetailsList.size());

                        if (skuDetailsList.size() > 0){
                            BillingFlowParams billingFlowParams = BillingFlowParams.newBuilder()

                            String responseCode = billingClient.launchBillingFlow(DetailActivity.this, billingFlowParams).toString();
                            Log.d(TAG, "billingDebug: response: " + responseCode);


How can i use the billing library to purchase multiple SKUs / multi quantity of a single SKU? Any help would be appreciated. Thanks in Advance.


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