應用內結算：購買后如何查詢庫存，以獲取價格和貨幣代碼？

Question

在Android應用中使用Google應用內結算進行購買后，我試圖獲取價格和貨幣代碼。

成功購買后，我會在庫存中查詢相同的SKU，但會得到空值

new IabHelper.OnIabPurchaseFinishedListener() {
    public void onIabPurchaseFinished(IabResult result, Purchase purchase) {
        if (result.isFailure()) {
            return;
        } else if (purchase.getSku().equals(MY_SKU)) {
            if (purchase.getPurchaseState() == 0) {
                try {
                    Inventory inventory = appBillingHelper.queryInventory();
                    price = inventory.getSkuDetails(MY_SKU).getPrice(); // CRASHES WITH A NULL POINTER EXCEPTION for SkuDetails.
                    currencyCode = inventory.getSkuDetails(MY_SKU).getPriceCurrencyCode();

Answer 1

您應該按照此處說明的步驟進行操作https://developer.android.com/training/in-app-billing/purchase-iab-products.html#QueryPurchases