I get the error 'Platform' does not contain a definition for 'Init' in Microsoft.Maui.ApplicationModel.Platform.Init(this, bundle);

Question

I get the following error after updating my NuGet packages: 'Platform' does not contain a definition for 'Init'

Activity1.cs:

using Android;
using Android.App;
using Android.Content.PM;
using Android.OS;
using Android.Views;
using Android.Util;
using Android.Content;
using Microsoft.Xna.Framework;
using SharedCode;
using Plugin.InAppBilling;
using System;
using Microsoft.AppCenter;
using Microsoft.AppCenter.Analytics;
using Microsoft.AppCenter.Crashes;
using Android.Gms.Common;
using Firebase.Messaging;
using Firebase.Iid;
using Android.Widget;
using Android.Media;
using MediaManager;
using AndroidX.Core.App;
using AndroidX.Core.Content;
using System.Diagnostics;
using Android.Runtime;

protected override void OnCreate(Bundle bundle)  
{      
    AndroidX.Core.SplashScreen.SplashScreen.InstallSplashScreen(this);          
    base.SetTheme(Resource.Style.MainTheme);      
    base.OnCreate(bundle);  
    Microsoft.Maui.ApplicationModel.Platform.Init(this, bundle);

Before updating it worked with the following NuGet packages:

Now I use the current NuGet packages:

Is something wrong with my NuGet packages?

In addition, I get these 3 warnings:

Detected package version outside of dependency constraint: Xamarin.AndroidX.Lifecycle.LiveData 2.8.3.1 requires Xamarin.AndroidX.Lifecycle.LiveData.Core.Ktx (>= 2.8.3.1 && < 2.8.4) but version Xamarin.AndroidX.Lifecycle.LiveData.Core.Ktx 2.8.7.1 was resolved.

Detected package version outside of dependency constraint: Xamarin.AndroidX.Lifecycle.LiveData 2.8.3.1 requires Xamarin.AndroidX.Lifecycle.LiveData.Core (>= 2.8.3.1 && < 2.8.4) but version Xamarin.AndroidX.Lifecycle.LiveData.Core 2.8.7.1 was resolved.

Detected package version outside of dependency constraint: Xamarin.AndroidX.Lifecycle.LiveData.Ktx 2.8.3.1 requires Xamarin.AndroidX.Lifecycle.LiveData.Core.Ktx (>= 2.8.3.1 && < 2.8.4) but version Xamarin.AndroidX.Lifecycle.LiveData.Core.Ktx 2.8.7.1 was resolved.

Answer 1

Hello,

get the following error after updating my NuGet packages: 'Platform' does not contain a definition for 'Init'

Firstly, if .NET version is 8.0, please do not update Microsoft.Maui.Controls , Microsoft.Maui.Controls and Microsoft.Maui.Essentials to the 9.0 or later, please keep the 8.0.100

<PackageReference Include="Microsoft.Maui.Controls" Version="8.0.100" />
<PackageReference Include="Microsoft.Maui.Controls.Core" Version="8.0.100" />
 
  <PackageReference Include="Microsoft.Maui.Essentials" Version="8.0.100" />
 

For these 3 warnings, please downgrade your Plugin.InAppBilling version to 7.1.3.

<PackageReference Include="Plugin.InAppBilling" Version="7.1.3" />

Best Regards,

Leon Lu

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