问题
I'm trying to restore purchases just like iOS, and I can't figure out how to easily restore an IAP entitlement purchase with the Amazon API.
If I send another request with the SKU to the PurchasingManager, it returns a PurchaseResponse, but that PurchaseResponse doesn't return a valid Receipt if the SKU has already been purchased. It's null.
Seems like I would need that SKU to do any kind of processing.
回答1:
Found how to do this.
Turns out a different function call is needed instead of the initiatePurchaseRequest call.
PurchasingManager.initiatePurchaseUpdatesRequest(Offset offset)
This call gets all the purchases the user has made then returns them to the PurchasingObserver to be handled by:
PurchasingObserver.onPurchaseUpdatesResponse(PurchaseUpdatesResponse purchaseUpdatesResponse)
来源：https://stackoverflow.com/questions/14078428/how-do-i-easily-restore-purchases-using-the-amazon-api