Updating .NET MAUI app to android version 34 causing app to crash

Question

I recently tried updating a .NET MAUI app that we have that was targeting android version 33 to version 34. Im now getting 4 errors:

Assets file '{Filepath}\obj\project.assets.json' doesn't have a target for 'net8.0-windows10.0.19041.0'. Ensure that restore has run and that you have included 'net8.0-windows10.0.19041.0' in the TargetFrameworks for your project.

Assets file '{Filepath}\obj\project.assets.json' doesn't have a target for 'net8.0-ios'. Ensure that restore has run and that you have included 'net8.0-ios' in the TargetFrameworks for your project.

Assets file '{Filepath}\obj\project.assets.json' doesn't have a target for 'net8.0-android34.0'. Ensure that restore has run and that you have included 'net8.0-android34.0' in the TargetFrameworks for your project.

Assets file '{Filepath}\obj\project.assets.json' doesn't have a target for 'net7.0-maccatalyst'. Ensure that restore has run and that you have included 'net7.0-maccatalyst' in the TargetFrameworks for your project.

I've tried running msbuild /target:Restore {Project Name.sln} from the developer powershell, but still no dice. I see that this seems to be a pretty common issue but I haven't had any luck with the solutions

How did you update your app to android version 34? In addition, why did the errors contains both .net7.0 and .net8.0? — Liyun Zhang - MSFT
– Liyun Zhang - MSFT, Commented Feb 10 at 2:52
Went into the project properties and updated it to .net8.0 and version 34. I would assume that because it used to target .net7.0 but I had to make the upgrade to get it to version 34. Is there a better way to do that? Sorry for whats probably a stupid question! — Zachary Demmel
– Zachary Demmel, Commented Feb 10 at 15:24

Liyun Zhang - MSFT · Accepted Answer · 2025-02-11 07:28:30Z

0

If you don't have to use the new api in the Android version 34.0, the easiest way to update your app to android version 34 is setting the target sdk in the AndoridManifest.xml. Just add the following code in the AndoridManifest.xml.

<uses-sdk android:targetSdkVersion="34" />

In addition, the .Net 7 is obsolete. So if you want to upgrade your maui project from .net 7 to .net 8, you can change the csproj file as the following code after installing .NET 8 and the .NET MAUI workload.

<PropertyGroup>
     <TargetFrameworks>net8.0-android;net8.0-ios;net8.0-maccatalyst</TargetFrameworks>
     <TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net8.0-windows10.0.19041.0</TargetFrameworks>

The .net 8.0 maui project target Android version 34 defaultly. For more information, you can refer to Upgrading .NET MAUI from .NET 7 to .NET 8.

edited Feb 11 at 7:28

answered Feb 11 at 7:20

Liyun Zhang - MSFT

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1 Comment

Zachary Demmel Feb 11 at 15:59

I can't believe it was something so simple, I just needed to change the maccatalyst version in the csproj file. Thank you so much!

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