feat: upgrade to .NET 9.0 for Android and fix Fonts issue.

.github/workflows/publish.yml

@@ -217,7 +217,7 @@ jobs:
       - name: Restore Dependencies
         run: dotnet restore
       - name: Publish Android
-        run: dotnet publish demo/Semi.Avalonia.Demo.Android -c Release -f net8.0-android --no-restore -o publish /p:RuntimeIdentifier=android-arm64
+        run: dotnet publish demo/Semi.Avalonia.Demo.Android -c Release -f net9.0-android --no-restore -o publish /p:RuntimeIdentifier=android-arm64
       - name: Upload a Build Artifact
         uses: actions/upload-artifact@v4.6.2
         with:

demo/Semi.Avalonia.Demo.Android/AvaloniaAppBuilderExtensions.cs

@@ -0,0 +1,16 @@
+using Avalonia;
+using Avalonia.Media;
+
+namespace Semi.Avalonia.Demo.Android;
+
+public static class AvaloniaAppBuilderExtensions
+{
+    private static string DefaultFontFamily => "avares://Semi.Avalonia.Demo.Android/Assets#Source Han Sans CN";
+
+    public static AppBuilder WithSourceHanSansCNFont(this AppBuilder builder) =>
+        builder.With(new FontManagerOptions
+        {
+            DefaultFamilyName = DefaultFontFamily,
+            FontFallbacks = [new FontFallback { FontFamily = new FontFamily(DefaultFontFamily) }]
+        });
+}

demo/Semi.Avalonia.Demo.Android/MainActivity.cs

@@ -1,5 +1,6 @@
 using Android.App;
 using Android.Content.PM;
+using Avalonia;
 using Avalonia.Android;
 
 namespace Semi.Avalonia.Demo.Android;
@@ -13,4 +14,9 @@ namespace Semi.Avalonia.Demo.Android;
     ConfigurationChanges = ConfigChanges.Orientation | ConfigChanges.ScreenSize | ConfigChanges.UiMode)]
 public class MainActivity : AvaloniaMainActivity<App>
 {
+    protected override AppBuilder CustomizeAppBuilder(AppBuilder builder)
+    {
+        return base.CustomizeAppBuilder(builder)
+            .WithSourceHanSansCNFont();
+    }
 }

demo/Semi.Avalonia.Demo.Android/Semi.Avalonia.Demo.Android.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <OutputType>Exe</OutputType>
-        <TargetFramework>net8.0-android</TargetFramework>
+        <TargetFramework>net9.0-android</TargetFramework>
         <SupportedOSPlatformVersion>21</SupportedOSPlatformVersion>
         <Nullable>enable</Nullable>
         <ApplicationId>com.irihitech.Semi.Avalonia</ApplicationId>
@@ -15,6 +15,7 @@
 
     <ItemGroup>
         <AndroidResource Include="Icon.png" Link="Resources\drawable\Icon.png"/>
+        <AvaloniaResource Include="..\Fonts\*" Link="Assets\Fonts\%(Filename)%(Extension)" />
     </ItemGroup>
 
     <ItemGroup>

demo/Semi.Avalonia.Demo.Web/Semi.Avalonia.Demo.Web.csproj

@@ -7,7 +7,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <AvaloniaResource Include="Assets\**"/>
+        <AvaloniaResource Include="..\Fonts\*" Link="Assets\Fonts\%(Filename)%(Extension)" />
     </ItemGroup>
 
     <ItemGroup>