init

AvaCs3.Android/AvaCs3.Android.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0-android</TargetFramework>
+    <SupportedOSPlatformVersion>21</SupportedOSPlatformVersion>
+    <Nullable>enable</Nullable>
+    <ApplicationId>com.CompanyName.AvaloniaTest</ApplicationId>
+    <ApplicationVersion>1</ApplicationVersion>
+    <ApplicationDisplayVersion>1.0</ApplicationDisplayVersion>
+    <AndroidPackageFormat>apk</AndroidPackageFormat>
+    <AndroidEnableProfiledAot>true</AndroidEnableProfiledAot>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <AndroidResource Include="Icon.png">
+      <Link>Resources\drawable\Icon.png</Link>
+    </AndroidResource>
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Avalonia.Android" Version="$(AvaloniaVersion)" />
+    <PackageReference Include="Microsoft.NET.Runtime.MonoAOTCompiler.Task" Version="9.0.0" />
+    <PackageReference Include="Xamarin.AndroidX.Core.SplashScreen" Version="1.0.1.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\AvaCs3\AvaCs3.csproj" />
+  </ItemGroup>
+</Project>

AvaCs3.Android/MainActivity.cs

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+using Android.App;
+using Android.Content.PM;
+
+using Avalonia;
+using Avalonia.Android;
+using Avalonia.ReactiveUI;
+
+namespace AvaCs3.Android;
+
+[Activity(
+    Label = "AvaCs3.Android",
+    Theme = "@style/MyTheme.NoActionBar",
+    Icon = "@drawable/icon",
+    MainLauncher = true,
+    ConfigurationChanges = ConfigChanges.Orientation | ConfigChanges.ScreenSize | ConfigChanges.UiMode)]
+public class MainActivity : AvaloniaMainActivity<App>
+{
+    protected override AppBuilder CustomizeAppBuilder(AppBuilder builder)
+    {
+        return base.CustomizeAppBuilder(builder)
+            .WithInterFont()
+            .UseReactiveUI();
+    }
+}

AvaCs3.Android/Properties/AndroidManifest.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:installLocation="auto">
+	<uses-permission android:name="android.permission.INTERNET" />
+	<application android:label="AvaloniaTest" android:icon="@drawable/Icon" />
+</manifest>

AvaCs3.Android/Resources/drawable/splash_screen.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+
+  <item>
+    <color android:color="@color/splash_background"/>
+  </item>
+
+  <item android:drawable="@drawable/icon"
+        android:width="120dp"
+        android:height="120dp"
+        android:gravity="center" />
+
+</layer-list>

AvaCs3.Android/Resources/values-night/colors.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <color name="splash_background">#212121</color>
+</resources>

AvaCs3.Android/Resources/values/colors.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <color name="splash_background">#FFFFFF</color>
+</resources>

AvaCs3.Android/Resources/values/styles.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<resources>
+
+  <style name="MyTheme">
+  </style>
+
+  <style name="MyTheme.NoActionBar" parent="@style/Theme.AppCompat.DayNight.NoActionBar">
+    <item name="android:windowActionBar">false</item>
+    <item name="android:windowBackground">@drawable/splash_screen</item>
+    <item name="android:windowNoTitle">true</item>
+  </style>
+</resources>

AvaCs3.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.12.35527.113 d17.12
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AvaCs3", "AvaCs3\AvaCs3.csproj", "{B8E23406-51C5-4181-B8B3-85A216EA893A}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AvaCs3.Android", "AvaCs3.Android\AvaCs3.Android.csproj", "{B206A310-BC2E-408E-9445-1BD6ED9F078D}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B8E23406-51C5-4181-B8B3-85A216EA893A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B8E23406-51C5-4181-B8B3-85A216EA893A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B8E23406-51C5-4181-B8B3-85A216EA893A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B8E23406-51C5-4181-B8B3-85A216EA893A}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B206A310-BC2E-408E-9445-1BD6ED9F078D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B206A310-BC2E-408E-9445-1BD6ED9F078D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B206A310-BC2E-408E-9445-1BD6ED9F078D}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
+		{B206A310-BC2E-408E-9445-1BD6ED9F078D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B206A310-BC2E-408E-9445-1BD6ED9F078D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B206A310-BC2E-408E-9445-1BD6ED9F078D}.Release|Any CPU.Deploy.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

AvaCs3/App.axaml

@@ -0,0 +1,10 @@
+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             x:Class="AvaCs3.App"
+             RequestedThemeVariant="Default">
+             <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->
+
+    <Application.Styles>
+        <FluentTheme />
+    </Application.Styles>
+</Application>

AvaCs3/App.axaml.cs

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+using AvaCs3.ViewModels;
+using AvaCs3.Views;
+
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+namespace AvaCs3;
+
+public partial class App : Application
+{
+    public override void Initialize()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+
+    public override void OnFrameworkInitializationCompleted()
+    {
+        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        {
+            desktop.MainWindow = new MainWindow
+            {
+                DataContext = new MainViewModel()
+            };
+        }
+        else if (ApplicationLifetime is ISingleViewApplicationLifetime singleViewPlatform)
+        {
+            singleViewPlatform.MainView = new MainView
+            {
+                DataContext = new MainViewModel()
+            };
+        }
+
+        base.OnFrameworkInitializationCompleted();
+    }
+}

AvaCs3/AvaCs3.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <LangVersion>latest</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <AvaloniaResource Include="Assets\**" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Avalonia" Version="$(AvaloniaVersion)" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="$(AvaloniaVersion)" />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="$(AvaloniaVersion)" />
+    <PackageReference Include="Avalonia.ReactiveUI" Version="$(AvaloniaVersion)" />
+    <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
+    <PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="$(AvaloniaVersion)" />
+  </ItemGroup>
+</Project>

AvaCs3/ViewModels/MainViewModel.cs

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+namespace AvaCs3.ViewModels;
+
+public class MainViewModel : ViewModelBase
+{
+    public string Greeting => "Welcome to Avalonia!";
+}

AvaCs3/ViewModels/ViewModelBase.cs

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+using ReactiveUI;
+
+namespace AvaCs3.ViewModels;
+
+public class ViewModelBase : ReactiveObject
+{
+}

AvaCs3/Views/MainView.axaml

@@ -0,0 +1,16 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:vm="clr-namespace:AvaCs3.ViewModels"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="AvaCs3.Views.MainView"
+             x:DataType="vm:MainViewModel">
+  <Design.DataContext>
+    <!-- This only sets the DataContext for the previewer in an IDE,
+         to set the actual DataContext for runtime, set the DataContext property in code (look at App.axaml.cs) -->
+    <vm:MainViewModel />
+  </Design.DataContext>
+
+  <TextBlock Text="{Binding Greeting}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+</UserControl>

AvaCs3/Views/MainView.axaml.cs

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+using Avalonia.Controls;
+
+namespace AvaCs3.Views;
+
+public partial class MainView : UserControl
+{
+    public MainView()
+    {
+        InitializeComponent();
+    }
+}

AvaCs3/Views/MainWindow.axaml

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+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="using:AvaCs3.ViewModels"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:views="clr-namespace:AvaCs3.Views"
+        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        x:Class="AvaCs3.Views.MainWindow"
+        Icon="/Assets/avalonia-logo.ico"
+        Title="AvaCs3">
+        <views:MainView />
+</Window>

AvaCs3/Views/MainWindow.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace AvaCs3.Views;
+
+public partial class MainWindow : Window
+{
+    public MainWindow()
+    {
+        InitializeComponent();
+    }
+}

Directory.Build.props

@@ -0,0 +1,6 @@
+<Project>
+  <PropertyGroup>
+    <Nullable>enable</Nullable>
+    <AvaloniaVersion>11.1.0</AvaloniaVersion>
+  </PropertyGroup>
+</Project>