Android Question In-App Billing error: a null object reference

[androh]

I've a problem that I can not fix.
My application is always running background. Billing manager is in Starter Service.
If I call manager.GetOwnedProducts while Google Play Store stopped (self-update or change device language etc.), my application crashes.

I find a same error here https://github.com/googlesamples/android-play-billing/issues/45#issuecomment-324466519

And here a solution https://github.com/googlesamples/android-play-billing/issues/45#issuecomment-328961916

How can I register a event for onBillingServiceDisconnected() for BillingManager?

java.lang.NullPointerException:
 
  at anywheresoftware.b4a.objects.IbHelper.queryPurchases (IbHelper.java:836)
 
  at anywheresoftware.b4a.objects.IbHelper.queryInventory (IbHelper.java:544)
 
  at anywheresoftware.b4a.objects.IbHelper.queryInventory (IbHelper.java:523)
 
  at anywheresoftware.b4a.objects.IbHelper$3.run (IbHelper.java:616)
 
  at java.lang.Thread.run (Thread.java:764)

 

[androh]

I found a solution

Sub Service_Create
 
   InitBillMan
 
End Sub

Sub CheckProducts

   Dim r As Reflector
   r.Target=BillingManager
   r.Target=r.GetField("helper")
   r.Target=r.GetField("mService")
          
   If Not(r.IsNull) Then         
       BillingManager.GetOwnedProducts
   Else
       InitBillMan
   End If

End Sub

Private Sub InitBillMan
 
   BillingManager.Initialize("BillMan", BillingKey)
 

   Wait For BillMan_BillingSupported (Supported As Boolean, Message As String)
   If Supported Then
       BillingManager.GetOwnedProducts
   End If

End Sub

 

[Deleted member 103]

Hi @androh ,

I have exactly the same error.
One thing I do not understand in your code, where / when is the SUB CheckProducts running?

 

[androh]

Hi Filippo,
You can run CheckProducts when you want to get owned products.
Therefore you can change your code "BillingManager.GetOwnedProducts" with "CheckProducts".
CheckProducts sub will run "BillingManager.GetOwnedProducts" safely.

 

[Deleted member 103]

Alright, thank you!