Build a Game That Features Local In-App Purchases

// Obtain the Activity object.
final Activity activity = getActivity();
Task<IsEnvReadyResult> task = Iap.getIapClient(activity).isEnvReady();
task.addOnSuccessListener(new OnSuccessListener<IsEnvReadyResult>() {
    @Override
    public void onSuccess(IsEnvReadyResult result) {
        // Obtain the execution result.
        String carrierId = result.getCarrierId();
    }
}).addOnFailureListener(new OnFailureListener() {
    @Override
    public void onFailure(Exception e) {
        if (e instanceof IapApiException) {
            IapApiException apiException = (IapApiException) e;
            Status status = apiException.getStatus();
            if (status.getStatusCode() == OrderStatusCode.ORDER_HWID_NOT_LOGIN) {
                // HUAWEI ID is not signed in.
                if (status.hasResolution()) {
                    try {
                        // 6666 is a constant.
                        // Open the sign-in screen returned.
                        status.startResolutionForResult(activity, 6666);
                    } catch (IntentSender.SendIntentException exp) {
                    }
                }
            } else if (status.getStatusCode() == OrderStatusCode.ORDER_ACCOUNT_AREA_NOT_SUPPORTED) {
                // The current country/region does not support IAP.
            }
        } else {
            // Other external errors.
        }
    }
});
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == 6666) {
        if (data != null) {
            // Call the parseRespCodeFromIntent method to obtain the result.
            int returnCode = IapClientHelper.parseRespCodeFromIntent(data);
            // Use the parseCarrierIdFromIntent method to obtain the carrier ID returned by the API.
            String carrierId = IapClientHelper.parseCarrierIdFromIntent(data);
        }
    }
}

List<String> productIdList = new ArrayList<>();
// Only those products already configured can be queried.
productIdList.add("ConsumeProduct1001");
ProductInfoReq req = new ProductInfoReq();
// priceType: 0: consumable; 1: non-consumable; 2: subscription
req.setPriceType(0);
req.setProductIds(productIdList);
// Obtain the Activity object.
final Activity activity = getActivity();
// Call the obtainProductInfo API to obtain the details of the configured product.
Task<ProductInfoResult> task = Iap.getIapClient(activity).obtainProductInfo(req);
task.addOnSuccessListener(new OnSuccessListener<ProductInfoResult>() {
    @Override
    public void onSuccess(ProductInfoResult result) {
        // Obtain the product details returned upon a successful API call.
       List<ProductInfo> productList = result.getProductInfoList();
    }
}).addOnFailureListener(new OnFailureListener() {
    @Override
    public void onFailure(Exception e) {
        if (e instanceof IapApiException) {
            IapApiException apiException = (IapApiException) e;
            int returnCode = apiException.getStatusCode();
        } else {
            // Other external errors.
        }
    }
});

// Construct a PurchaseIntentReq object.
PurchaseIntentReq req = new PurchaseIntentReq();
// Only the products already configured can be purchased through the createPurchaseIntent API.
req.setProductId("CProduct1");
// priceType: 0: consumable; 1: non-consumable; 2: subscription
req.setPriceType(0);
req.setDeveloperPayload("test");
// Obtain the Activity object.
final Activity activity = getActivity();
// Call the createPurchaseIntent API to create a product order.
Task<PurchaseIntentResult> task = Iap.getIapClient(activity).createPurchaseIntent(req);
task.addOnSuccessListener(new OnSuccessListener<PurchaseIntentResult>() {
    @Override
    public void onSuccess(PurchaseIntentResult result) {
        // Obtain the order creation result.
        Status status = result.getStatus();
        if (status.hasResolution()) {
            try {
                // 6666 is a constant.
                // Open the checkout screen returned.
                status.startResolutionForResult(activity, 6666);
            } catch (IntentSender.SendIntentException exp) {
            }
        }
    }
}).addOnFailureListener(new OnFailureListener() {
    @Override
    public void onFailure(Exception e) {
        if (e instanceof IapApiException) {
            IapApiException apiException = (IapApiException) e;
            Status status = apiException.getStatus();
            int returnCode = apiException.getStatusCode();
        } else {
            // Other external errors.
        }
    }
});

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == 6666) {
        if (data == null) {
            Log.e("onActivityResult", "data is null");
            return;
        }
        // Call the parsePurchaseResultInfoFromIntent method to parse the payment result.
        PurchaseResultInfo purchaseResultInfo = Iap.getIapClient(this).parsePurchaseResultInfoFromIntent(data);
        switch(purchaseResultInfo.getReturnCode()) {
            case OrderStatusCode.ORDER_STATE_CANCEL:
                // The user cancels the purchase.
                break;
            case OrderStatusCode.ORDER_STATE_FAILED:
            case OrderStatusCode.ORDER_PRODUCT_OWNED:
                // Check whether the delivery is successful.
                break;
            case OrderStatusCode.ORDER_STATE_SUCCESS:
                // The payment is successful.
                String inAppPurchaseData = purchaseResultInfo.getInAppPurchaseData();
                String inAppPurchaseDataSignature = purchaseResultInfo.getInAppDataSignature();
                // Verify the signature using your app's IAP public key.
                // Start delivery if the verification is successful.
                // Call the consumeOwnedPurchase API to consume the product after delivery if the product is a consumable.
                break;
            default:
                break;
        }
    }
}