Cannot build an Android app with Xamarin

Aurélien Bouillon 26

Hi, here is what error is writen when building the app :

1>------ Début de la génération : Projet : Projet CLAC, Configuration : Debug Any CPU ------
C:\Program Files (x86)\Android\android-sdk\emulator\emulator.EXE -no-boot-anim -avd pixel_2_pie_9_0_-_api_28 -prop monodroid.avdname=pixel_2_pie_9_0_-_api_28
Impossible de démarrer l'émulateur pixel_2_pie_9_0_-_api_28.
1>C:\Microsoft\Xamarin\NuGet\xamarin.forms\4.8.0.1451\buildTransitive\Xamarin.Forms.targets(232,5): warning : Xamarin.Forms recommends TargetPlatformMinVersion >= 10.0.14393.0 (current project is -1)
1>C:\Microsoft\Xamarin\NuGet\xamarin.forms\4.8.0.1451\buildTransitive\Xamarin.Forms.targets(238,5): warning : Xamarin.Forms recommends TargetPlatformVersion >= 10.0.17763.0 (current project is -1)
Vérifications à l'exécution effectuées
1>Génération du projet "Projet CLAC.csproj" terminée -- ÉCHEC.
La génération a été annulée.

I don't understand why it doesn't work.

Aurélien Bouillon 26 Reputation points

2020-12-12T11:46:24.287+00:00

Update : the TargetPlatform Error has disappeared, but it doesn't launch yet :

L'opération de génération a démarré...
Démarrage de l'émulateur pixel_2_pie_9_0_-_api_28...
1>------ Début de la génération : Projet : Projet CLAC.Android, Configuration : Debug Any CPU ------
C:\Program Files (x86)\Android\android-sdk\emulator\emulator.EXE -no-boot-anim -avd pixel_2_pie_9_0_-_api_28 -prop monodroid.avdname=pixel_2_pie_9_0_-_api_28
Impossible de démarrer l'émulateur pixel_2_pie_9_0_-_api_28.
Vérifications à l'exécution effectuées
La génération a été annulée.
Alessandro Caliaro 4,186 Reputation points

2020-12-12T11:47:25.26+00:00

this seems another problem. Open a new thread. Try with a real device
Aurélien Bouillon 26 Reputation points

2020-12-12T12:03:48.6+00:00

Here is the new thread !
https://learn.microsoft.com/en-us/answers/questions/196019/problem-when-building-an-android-project.html

Thanks for your help on the first part of the problem !
Lex Li (Microsoft) 5,582 Reputation points Microsoft Employee

2020-12-12T18:53:13.44+00:00

Then you should accept the answer provided by @Alessandro Caliaro to close this discussion.
JessieZhang-MSFT 7,706 Reputation points Microsoft Vendor

2020-12-14T01:41:13.84+00:00

Hi @Aurélien Bouillon ,could you pease mark the useful reply as answered ? Thanks in advance.

Accepted answer

Alessandro Caliaro 4,186 Reputation points

2020-12-12T11:22:28.46+00:00

Do you have set the Target platform in the android project properties? It seems it is not defined
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Aurélien Bouillon 26 Reputation points

2020-12-12T11:28:51.737+00:00

Nop, I don't know where to check this, can you help me please ?

Aurélien Bouillon 26 Reputation points

2020-12-12T11:33:43.457+00:00

I've added the "x64" platform to my Android Project, but I see no difference :

Alessandro Caliaro 4,186 Reputation points

2020-12-12T11:41:40.197+00:00

I think you have to set "Any CPU"
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Alessandro Caliaro 4,186 Reputation points

2020-12-12T11:43:22.733+00:00
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Cannot build an Android app with Xamarin

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