I recently started learning .NET and am currently learning to build applications using .NET MAUI.

At the moment, I am following Build mobile and desktop apps with .NET MAUI

When running the .NET MAUI application that is created when creating a new project in Visual Studio, it is able to run and build fine for the windows machine. But when I try to run the android emulator, "Pixel 5 - API 33 (Android 13.0 - API 33)", it starts the emulator but fails the build for the application.

I tried deleting the emulator and redownloading it again to see if it would work but I got the same problem.

Additionally, these are the logs when I try to build application and the target is the android emulator.

Build started... 1>------ Build started: Project: MauiApp1, Configuration: Debug Any CPU ------ Starting emulator pixel_5_-_api_33 ... 1>C:\Program Files\dotnet\sdk\7.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(376,5): error NETSDK1127: The targeting pack Microsoft.Android is not installed. Please restore and try again. 1>C:\Program Files\dotnet\sdk\7.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(376,5): error NETSDK1127: The targeting pack Microsoft.Maui.Core is not installed. Please restore and try again. 1>C:\Program Files\dotnet\sdk\7.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(376,5): error NETSDK1127: The targeting pack Microsoft.Maui.Controls is not installed. Please restore and try again. 1>C:\Program Files\dotnet\sdk\7.0.100\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(376,5): error NETSDK1127: The targeting pack Microsoft.Maui.Essentials is not installed. Please restore and try again. 1>Done building project "MauiApp1.csproj" -- FAILED. ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== ========== Elapsed 00:00.468 ========== ========== Deploy: 0 succeeded, 0 failed, 0 skipped ========== ========== Elapsed 00:00.468 ========== C:\Program Files (x86)\Android\android-sdk\emulator\emulator.EXE -netfast -accel on -avd pixel_5_-_api_33 -prop monodroid.avdname=pixel_5_-_api_33 Emulator pixel_5_-_api_33 is running.

Update: I decided to create a new project and it was able to run fine. I'm not sure why it didn't work previously but when I looked at the live visual tree the component of the app wouldn't show up so I think that might have something to do with it.

CodePudding user response：

Per your build log, the four targeting packs below were not being completed downloaded by the Visual Studio previously so that's why the build error occurred in Android Emulator.

• Microsoft.Android
• Microsoft.Maui.Core
• Microsoft.Maui.Controls
• Microsoft.Maui.Essentials

When you created a new project, the packs were ready so it would run successfully.