Hi everybody, please I need your help to update my App in google Play. I’m getting the following error:
“We’ve detected that this app uses an unsupported version of Play Billing. Please upgrade to version 5 (or later) of the Billing Library to publish this app.”
I’m working with Unity 2019.2.21f1 editor (64 bit). The problem is that it only allows me to update the billing library to version 2.2.2. Is there any other way to avoid this error without updating the editor? If I update the editor I practically have to make the game from the beginning due to compatibility issues.
Afaik, the editor restriction is only a preference and has nothing to do with v5 of billing client.
We have our own implementation of Billing Client and based on that experience if you are ready for experimenting to make it work on lower unity versions, let’s start diving in.
Download recent version of Unity IAP from latest unity editor
Go the package caches and copy purchasing folder
In your current project, remove the IAP package from package manager.
Place the copied folder in Assets folder (I suppose you can event place it directly in Packages folder too)
Try making a build
If you see any errors while building, do share the complete log under “CommandInvocationFailure”.
We understand how difficult it will be to upgrade/downgrade unity versions once everything is ready. So the above steps are worth trying to keep the same unity version. Let’s see how it goes!
1.- I downloaded the Package: com.unity.purchasing@4.9.2 from the Unity 2020.3.0f1 (64-bit) editor. It is the highest.
2.- I copied it to the package folder.
3- In my Unity 2019.2.21f1 (64-bit) project, I uninstalled the InApp 2.2.2 package
4.- I placed the copied folder in the Package folder of my project.
Ok, I did something else after I got the above errors:
1.- I downloaded the Package: com.unity.purchasing@3.0.1 from the Unity 2020.3.0f1 (64-bit) editor. Because I saw in the package manager that when you upgrade from InApp 2.x to 3.x you have to move some files to fix console errors.
2.- I copied it to the package folder.
3- In my Unity 2019.2.21f1 (64-bit) project, I uninstalled the InApp 2.2.2 package
4.- I placed the copied folder in the Package folder of my project and moved the files as indicated in the snapshot attached.
After that all the errors were gone and I was able to build the apk. But I don’t know if the com.unity.purchasing@3.0.1 is enough to avoid the google play billing error. By the way, there is no version 5 in Unity billing… so?
- Google Play - Billing Library update from version 4.0.0 to 5.1.0 [Google Release Notes](https://developer.android.com/google/play/billing/release-notes). New Google Billing features are not supported yet, they will be included in a future major update.
Proceed downloading that version and try to put it back in 2019.4. We will see what issues exist and try to fix. Most likely there won’t be any android side issues. Even if issues exists, it’s solvable!
Ok, I did it with V4.9.2, I get 4 errors, but I have no idea how to fix them because in this case there is no information on how to move files between folders… Do you have any idea how to solve it?
Thats fine. It’s unity iap version which includes Billing client v5.
However, I tried the suggested steps myself and found out the following
While V5 billing client library has some breaking changes, it’s not actually a requirement to have > 2019. Check point 3 why it’s not supported by unity.
To overcome those breaking changes, I need to edit the .cs native interface files which I don’t think it’s worth it.
They used C# 8.0 features extensively in the .cs files which is not supported in 2019.4 (I fixed it though by porting back). And I see now why Unity IAP don’t want to support 2019.x which is totally fair as these new C# 8 features make the code more robust with new operators.
Finally give a try by doing the following
Remove the purchasing entry from Package/manifest.json and also delete purchasing folder under Packages(if you have done as per my suggestion earlier)
Extract the attached zip in to a new folder (make sure you commit this folder to your git/version control as other team members need it too)
Open package manager and install the above package by pointing package.json (install via disk option)
Maybe the reason is that you are using Unity 2019.4 and I’m using Unity 2019.2.21 or maybe is because I use the Simple In App System (SIS) that I bought a long time ago…https://flobuk.com/
I really don’t know
The problem with upgrading from 2019.2.21 to 2019.4 is that 2019.2.21 was the last one that supported GUIText and my game has many. I know I need to fix that, but I wanted to after uploading this version of my game.
Hello again. To fix this, I’m trying to update the game from Unity 2019.2.21f1 (64-bit) to Unity 2019.4.0f1 (64-bit). The problem is that Unity 2019.4.0f1 (64 bit) doesn’t support GUI anymore and my game has a lot of them and it would take a long time to migrate all interfaces from GUI to UI. So my question is: Is there a possibility to export the GUI package from Unity 2019.2.21f1 and import it into 2019.4.0f1 like we did with the InApp package? If I can still use GUITextures and GUIText in 2019.4.0f1, I think I might have a chance to upload the apk now.
I think if you need to upgrade to 2019.4, you need to set yourself for replacing GUITexture with UI.Image as the earlier got obsolete. I don’t see another alternative.
Hello again Voxel, One question: What version of the Unity editor are you using?
I tried your IAP 4.9.2 on an empty project and I get errors when I try to build the apk. I tested it on Unity 1019.4.40.f1 and Unity 1019.4.0f1
Without the IAP 4.9.2 package, it compiles correctly
Maybe if because my poor English This is what I understood:
This is crazy 
