Android Question Android in-app billing purchase crashing the app

[asales]

In some devices (not all) I get this error when the user clicks to remove ads in my app:

~e:java.lang.NullPointerException: Attempt to invoke virtual method 'void anywheresoftware.b4a.objects.IbHelper.launchPurchaseFlow(android.app.Activity, java.lang.String, java.lang.String, int, anywheresoftware.b4a.objects.IbHelper$OnIabPurchaseFinishedListener, java.lang.String, anywheresoftware.b4a.BA)' on a null object reference
~e: at anywheresoftware.b4a.inappbilling3.BillingManager3.RequestPayment(BillingManager3.java:91)

my code is:

billman3.RequestPayment("noad", "inapp", DeveloperPayload)

Sub billman3_BillingSupported (Supported As Boolean, Message As String)
    Try
        If Supported Then billman3.GetOwnedProducts       
    Catch
        ToastMessageShow(LastException.Message, False)
        Log(LastException)
    End Try
End Sub

 

[Erel]

Have you waited for the BillingSupported event to be raised? What is the value of Supported parameter?

 

[asales]

Have you waited for the BillingSupported event to be raised?

I think so. This is the other part of the code:

Sub billman3_OwnedProducts (Success As Boolean, purchases As Map)
    If Success Then       
        If purchases.Size > 0 Then
            Try
                For Each p As Purchase In purchases.Values
                    If (p.ProductId = "noad") And (p.PurchaseState = p.STATE_PURCHASED) Then
                        RemoveAdvertisement(True)   
                    End If
                Next
            Catch
                Log(LastException)
            End Try
        Else
            RemoveAdvertisement(False)
        End If
    Else
        RemoveAdvertisement(False)
    End If   
End Sub

What is the value of Supported parameter?

In my device I don't get this error and the Supported shows "True" and Message shows "Setup successful. (response: 0:OK)"

 

[Erel]

Have you declared BillingManager as a process global variable? Is it initialized once when FirstTime is True?

 

[asales]

Have you declared BillingManager as a process global variable?

No, in Globals (Main activity).

Is it initialized once when FirstTime is True?

Yes:

If FirstTime Then
    billman3.Initialize("billman3", mykey)     
    billman3.DebugLogging = False
End If

 

[Erel]

Your code is wrong. Objects that are initialized only when FirstTime is true must be declared in Process_Globals. Otherwise they will not be initialized after the activity is recreated.