inAppPurchaseProduct (Function)

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Characteristics of WLanguage procedure
Special cases
Application in the background: Android 10 specific case

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inAppPurchaseProduct (Function)

In french: inAppAchèteProduit

Sends:

a request for purchasing an "In-App" product associated with the application.
Versions 23 and later
a request for purchasing a subscription.
New in version 23
a request for purchasing a subscription.
a request for purchasing a subscription.

Remark: The purchase request is asynchronous. A "Callback" procedure is run when receiving the response to the purchase request.

Example

MyProduct is inAppProduct = arrProduct[nIndex]
inAppPurchaseProduct(MyProduct, ValidateProductPurchase)

PROCEDURE ValidateProductPurchase(bSuccess is boolean, Product is inAppProduct, Receipt)

IF NOT bSuccess THEN
ToastDisplay(ErrorInfo())
RETURN
ELSE
// Android case
IF InAndroidMode() THEN
// Consume the product (optional)
inAppConsumeProduct(Product, Receipt, ConsumeProduct)
END
// iOS case
IF IniOSMode() THEN
// Activate the product in the application
EnableProduct(Product)
// Save the purchase in the application preferences
SaveParameter(Product..Identifier, 1)
END
END

Syntax

iOS: Sending a purchase request Hide the details

<Result> = inAppPurchaseProduct(<Product to purchase> , <Quantity> , <WLanguage procedure>)

<Result>: Boolean

True if the purchase request was performed,
False otherwise. To get the details of the error, use ErrorInfo.

<Product to purchase>: inAppProduct variable

Name of inAppProduct variable corresponding to:
the product to purchase.
Versions 23 and later
the subscription to purchase or to renew.
New in version 23
the subscription to purchase or to renew.
the subscription to purchase or to renew.

<Quantity>: Integer

Quantity to purchase.
Versions 23 and later
For a subscription, this parameter must correspond to 1.
New in version 23
For a subscription, this parameter must correspond to 1.
For a subscription, this parameter must correspond to 1.
If the value of this parameter is equal to 0, <Result> is set to False and the procedure is not called.

<WLanguage procedure>: Procedure name

Name of WLanguage procedure ("callback" procedure) run when receiving the response to the purchase request. See the Remarks paragraph in the help page for more details.

Android: Sending a purchase request Hide the details

<Result> = inAppPurchaseProduct(<Product to purchase> , <WLanguage procedure>)

<Result>: Boolean

True if the purchase request was performed,
False otherwise. To get the details of the error, use ErrorInfo.

<Product to purchase>: inAppProduct variable

Name of inAppProduct variable corresponding to:
the product to purchase.
Versions 23 and later
the subscription to purchase or to renew.
New in version 23
the subscription to purchase or to renew.
the subscription to purchase or to renew.

<WLanguage procedure>: Procedure name

Name of WLanguage procedure ("callback" procedure) run when receiving the response to the purchase request. See the Remarks paragraph in the help page for more details.

Remarks

Characteristics of WLanguage procedure

The procedure <WLanguage procedure> must be in the following format:

PROCEDURE <Procedure name>(<Success> is boolean, <Product> is inAppProduct,
<Receipt>, <Quantity> is int)

where:

<Success> is boolean:

True if the purchase was validated,

False otherwise. To get the details of the error, use ErrorInfo before any other call to a WLanguage function (this would reinitialize the error). ErrorInfo associated with the errCode constant returns one of the following error codes:


inAppCancelation	Purchase canceled by the user.
inAppUnknownError	Unknown error.
inAppSignatureError	Error while checking the data signature received for the purchase validation (security problem).
inAppInvalidResponse	Invalid response.

<Product> is an inAppProduct variable corresponding to the product or subscription that was purchased.
<Receipt> :
- <Receipt> is not available. To validate a purchase, you must use inAppListPurchase and make sure the purchase is in the list.
- <Receipt> is a character string corresponding to the purchase identifier. Then, this identifier can be used to consume the product that was purchased (inAppConsumeProduct).
<Quantity> is an integer corresponding to the quantity of products purchased.
- Versions 23 and later
  For a subscription, this parameter is always set to 1.
  New in version 23
  For a subscription, this parameter is always set to 1.
  For a subscription, this parameter is always set to 1.
- This parameter is always set to 1.

Special cases

If the purchase is valid, the application must supply the purchase content to the user.
If the purchase was performed, the application must store this information. This information can be stored in the preferences by SaveParameter.
Versions 23 and later
If inAppPurchaseProduct is used to purchase a subscription that is already active for the user, this subscription is automatically extended for the corresponding period.
New in version 23
If inAppPurchaseProduct is used to purchase a subscription that is already active for the user, this subscription is automatically extended for the corresponding period.
If inAppPurchaseProduct is used to purchase a subscription that is already active for the user, this subscription is automatically extended for the corresponding period.
You cannot purchase a product that was already purchased by the user. The product must be consumed (with inAppConsumeProduct) before it can be purchased again.
inAppListPurchase is used to retrieve the products purchased by the user and not consumed yet.
You cannot specify the quantity of products to purchase. You must create products corresponding to the desired quantity in the Google Play developer console. Then, the application must manage the use of the purchased quantities.
You cannot perform several requests for purchase at the same time. You must wait for the response to a request before performing a new request.
inAppPurchaseProduct has no effect if it is run from the Android simulator or emulator.

Versions 25 and later

Application in the background: Android 10 specific case

From Android 10, it is no longer possible to open a window when the application is in the background.

inAppPurchaseProduct can open a window. If this function is used while the application is in the background, a fatal error will occur.

Tips:

It is possible to determine if the application is in the background using InBackgroundMode.
If an application needs to interact with the user while it is in the background, the solution is to display a notification (via the Notification type). When the notification is clicked on, the application will be brought back to the foreground if ..ActivateApplication is set to True. It is also possible to open a window from the procedure passed to ..ActionClick.

See Android 10: Behavior of applications in the background for more details.

New in version 25

Application in the background: Android 10 specific case

From Android 10, it is no longer possible to open a window when the application is in the background.

inAppPurchaseProduct can open a window. If this function is used while the application is in the background, a fatal error will occur.

Tips:

It is possible to determine if the application is in the background using InBackgroundMode.
If an application needs to interact with the user while it is in the background, the solution is to display a notification (via the Notification type). When the notification is clicked on, the application will be brought back to the foreground if ..ActivateApplication is set to True. It is also possible to open a window from the procedure passed to ..ActionClick.

See Android 10: Behavior of applications in the background for more details.

Application in the background: Android 10 specific case

From Android 10, it is no longer possible to open a window when the application is in the background.

inAppPurchaseProduct can open a window. If this function is used while the application is in the background, a fatal error will occur.

Tips:

It is possible to determine if the application is in the background using InBackgroundMode.
If an application needs to interact with the user while it is in the background, the solution is to display a notification (via the Notification type). When the notification is clicked on, the application will be brought back to the foreground if ..ActivateApplication is set to True. It is also possible to open a window from the procedure passed to ..ActionClick.

See Android 10: Behavior of applications in the background for more details.

Component : wd250android.jar