I cannot get Visual Studio 2022 to recognise the downloaded JDK8 required by Xamarin project?

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I cannot get Visual Studio 2022 to recognise the downloaded JDK8 required by Xamarin project?

stuart wines 20

I am attempting to create an Xamarin Android project using C#, but this fails as the activity_main.xml insists it needs JDK8 to display the target screen. I've downloaded and installed JDK8, but inserting its address under Xamarin JDK Location in tools does not solve the problem. In addition, any Xamarin project saved cannot be reopened as it fails with a message that it cannot find an editor for activity_main.xml.
Any help would be appreciated.

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Answer 1

Tianyu Sun-MSFT 34,446 Microsoft External Staff

Hello @stuart wines ,

Welcome to Microsoft Q&A forum.

Typically, if you install the necessary workloads and components in Visual Studio, Visual Studio will set configurations automatically.

Please open Visual Studio => click Tools => Options => Xamarin => Android Settings => Java Development Kit Location, verify that the location of the jdk is set correctly(recommend using jdk 11 or higher). User's image

Please also try to reset VS settings by running devenv /ResetSettings command in Developer Command Prompt for Visual Studio 2022.

If above methods don’t work, please share us the detailed steps that you have done to install Xamarin support in VS for checking.

Feel free to contact us.

Sincerely,

Tianyu

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stuart wines 20 Reputation points

2023-04-05T16:45:14.9933333+00:00

When I start VS2022 there is no trace of Xamarin but if I use the Reset Settings this is resolved. However, if I create a blank Android Xamarin the file "activity_main.xml" displays OK, but the accompanying window for placing toolbox components contains an error message requiring JDK8 and that this is to be downloaded from Oracle (done). My Xamarin Development Kit Location is set to "jdk-11.0.16.101-hotspot". I have changed this before to the location of the downloaded Oracle JDK to no effect. Apart from this particular problem why do I need to reset the settings after restarting VS2022?
stuart wines 20 Reputation points

2023-04-08T16:02:09.0466667+00:00

Following the above, I uninstalled Bend 2022 and checked that no traces were left. I then reinstalled it and to be sure followed the advice in https://learn.microsoft.com/en-us/xamarin/get-started/installation/?pivots=windows-vs2022. This should have ended with version of VS2022, including Xamarin. The Tools menu is correct, showing Android and under Options Xamarin. However, on creating an Xamarin Android Blank Project "activity_main.xml still shows the message:

I have also Blend 2019 on the same machine, but this works correctly. Any ideas?
Tianyu Sun-MSFT 34,446 Reputation points Microsoft External Staff

2023-04-10T07:38:39.6433333+00:00

Hi @stuart wines ,

Did you change anything else except Android Settings(JDK Location, Android SDK Location, Archives Location) in VS, for example environment variables?

The error message does mention "repair VS from the installer to fix this error", have you tried to repair VS from VS Installer(More => Repair)?

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I cannot get Visual Studio 2022 to recognise the downloaded JDK8 required by Xamarin project?

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