Using promo code on Android returns null purchase

[jamesmontemagno]

See #100 for reference.

[DevEddy]

I've tested this with the nuget 1.4.1.157-beta. Same result.

const string PAYLOAD = "cloudmatic_app_payload_id";
public const string DESIGN = "app_design_id";
var purchase = await billing.PurchaseAsync(DESIGN, ItemType.InAppPurchase, PAYLOAD);

purchase is null when I use a promo code. But the purchase was successfull at the moment.

When I check the purchases with this, it's in the list of purchases.

var purchases = await billing.GetPurchasesAsync(ItemType.InAppPurchase);

Workaround

After purchasing is done with PurchaseAsync and purchase is null, check the purchase again with GetPurchasesAsync ;)

Google docs:

To support promotion codes, your app must call the queryPurchases() method whenever the app starts or resumes.

Also

Your Activity's onPurchasesUpdated() method receives a response intent identifying when a purchase is completed. However, your app should still call queryPurchases() in onStart() and onResume(), in the case the purchase and consumption workflow didn't complete. For example, if the user successfully redeems a promo code and then your app crashes before the item is consumed, your app still receives information about the purchase when the app calls queryPurchases() on its next startup.

Your app should also support the scenario where a user redeems a promo code in the Play Store app while the app is running. Your app can find out about the redemption through the onPurchasesUpdated() listener.

// EDDY

[chrisfoulds]

Also happens for test subscription purchases

[jamesmontemagno]

#268 dup