Add the multi-project template

src/Templates/src/templates/maui-multihead/.template.config/dotnetcli.host.json

@@ -0,0 +1,25 @@
+{
+  "$schema": "http://json.schemastore.org/dotnetcli.host",
+  "symbolInfo": {
+    "Framework": {
+      "longName": "framework"
+    },
+    "android": {
+      "shortName": ""
+    },
+    "ios": {
+      "shortName": ""
+    },
+    "maccatalyst": {
+      "longName": "macos",
+      "shortName": ""
+    },
+    "winui": {
+      "longName": "windows",
+      "shortName": ""
+    }
+  },
+  "usageExamples": [
+    "--framework DOTNET_TFM_VALUE --android --ios"
+  ]
+}

src/Templates/src/templates/maui-multihead/.template.config/ide.host.json

@@ -0,0 +1,44 @@
+{
+  "$schema": "http://json.schemastore.org/ide.host",
+  "icon": "ide/icon.ico",
+  "unsupportedHosts": [
+    {
+      "id": "vs",
+      "version": "(,17.3)"
+    }
+  ],
+  "requiredComponents": [
+    {
+      "id": "Microsoft.VisualStudio.ComponentGroup.Maui.All",
+      "hostId": "vs",
+      "componentType": "SetupComponent"
+    }
+  ],
+  "symbolInfo": [
+    {
+      "id": "Framework",
+      "persistenceScope": "shared",
+      "persistenceScopeName": "maui"
+    },
+    {
+      "id": "android",
+      "isVisible": true,
+      "defaultValue": "true"
+    },
+    {
+      "id": "ios",
+      "isVisible": true,
+      "defaultValue": "true"
+    },
+    {
+      "id": "maccatalyst",
+      "isVisible": true,
+      "defaultValue": "true"
+    },
+    {
+      "id": "winui",
+      "isVisible": true,
+      "defaultValue": "true"
+    }
+  ]
+}

src/Templates/src/templates/maui-multihead/.template.config/template.json

@@ -0,0 +1,195 @@
+{
+  "$schema": "http://json.schemastore.org/template",
+  "author": "Microsoft",
+  "classifications": [ "MAUI", "Android", "iOS", "macOS", "Mac Catalyst", "Windows", "Tizen", "Mobile" ],
+  "identity": "Microsoft.Maui.MultiProjectApp.CSharp.DOTNET_TFM_VERSION_VALUE",
+  "groupIdentity": "Microsoft.Maui.MultiProjectApp",
+  "precedence": "DOTNET_TFM_VERSION_MAJOR_VALUE",
+  "name": ".NET MAUI Multi-Project App",
+  "description": "A project for creating a .NET MAUI application for iOS, Android, Mac Catalyst, WinUI and Tizen with multiple, separate app projects.",
+  "shortName": "maui-multiproject",
+  "tags": {
+    "language": "C#",
+    "type": "project"
+  },
+  "sourceName": "MauiApp.1",
+  "primaryOutputs": [
+    {
+      "condition": "(HostIdentifier != \"dotnetcli\" && HostIdentifier != \"dotnetcli-preview\")",
+      "path": "MauiApp.1/MainPage.xaml.cs"
+    },
+    {
+      "condition": "(HostIdentifier != \"dotnetcli\" && HostIdentifier != \"dotnetcli-preview\")",
+      "path": "MauiApp.1/MainPage.xaml"
+    }
+  ],
+  "postActions": [
+    {
+      "id": "openInEditor",
+      "condition": "(HostIdentifier != \"dotnetcli\" && HostIdentifier != \"dotnetcli-preview\" && HostIdentifier != \"vs\")",
+      "description": "Opens MainPage.xaml in the editor.",
+      "manualInstructions": [],
+      "actionId": "84C0DA21-51C8-4541-9940-6CA19AF04EE6",
+      "args": {
+        "files": "0;1"
+      },
+      "continueOnError": true
+    }
+  ],
+  "sources": [
+    {
+      "source": "./",
+      "target": "./",
+      "copyOnly": [ "**/*.svg", "**/*.ttf" ],
+      "modifiers": [
+        {
+          "condition": "(!android && !AllPlatforms)",
+          "exclude": [
+            "MauiApp.1.Droid/**/*"
+          ]
+        },
+        {
+          "condition": "(!ios && !AllPlatforms)",
+          "exclude": [
+            "MauiApp.1.iOS/**/*"
+          ]
+        },
+        {
+          "condition": "(!maccatalyst && !AllPlatforms)",
+          "exclude": [
+            "MauiApp.1.Mac/**/*"
+          ]
+        },
+        {
+          "condition": "(!winui && !AllPlatforms)",
+          "exclude": [
+            "MauiApp.1.WinUI/**/*"
+          ]
+        }
+      ]
+    }
+  ],
+  "preferNameDirectory": true,
+  "guids": [
+    "87919f9c-abb8-48e5-bae7-eb1b4140f6a8"
+  ],
+  "symbols": {
+    "applicationId": {
+      "type": "parameter",
+      "description": "Overrides the $(ApplicationId) in the project",
+      "datatype": "string"
+    },
+    "msExtensionsLoggingDebugVersion": {
+      "type": "parameter",
+      "dataType": "string",
+      "replaces": "MS_EXT_LOG_DEBUG_VERSION",
+      "defaultValue": "MS_EXT_LOG_DEBUG_VERSION_VALUE"
+    },
+    "Framework": {
+      "type": "parameter",
+      "description": "The target framework for the project.",
+      "datatype": "choice",
+      "choices": [
+        {
+          "choice": "DOTNET_TFM_VALUE",
+          "description": "Target DOTNET_TFM_VALUE"
+        }
+      ],
+      "replaces": "DOTNET_TFM",
+      "defaultValue": "DOTNET_TFM_VALUE"
+    },
+    "android": {
+      "type": "parameter",
+      "datatype": "bool",
+      "defaultValue": "false",
+      "defaultIfOptionWithoutValue": "true",
+      "displayName": "Android",
+      "description": "Include the Android app head project"
+    },
+    "ios": {
+      "type": "parameter",
+      "datatype": "bool",
+      "defaultValue": "false",
+      "defaultIfOptionWithoutValue": "true",
+      "displayName": "iOS",
+      "description": "Include the iOS app head project"
+    },
+    "maccatalyst": {
+      "type": "parameter",
+      "datatype": "bool",
+      "defaultValue": "false",
+      "defaultIfOptionWithoutValue": "true",
+      "displayName": "macOS using Mac Catalyst",
+      "description": "Include the macOS app head project (using Mac Catalyst)"
+    },
+    "winui": {
+      "type": "parameter",
+      "datatype": "bool",
+      "defaultValue": "false",
+      "defaultIfOptionWithoutValue": "true",
+      "displayName": "Windows using WinUI 3",
+      "description": "Include the Windows app head project (using WinUI 3)"
+    },
+    "AllPlatforms": {
+      "type": "computed",
+      "value": "(!android && !ios && !maccatalyst && !winui)"
+    },
+    "HostIdentifier": {
+      "type": "bind",
+      "binding": "HostIdentifier"
+    },
+    "PhoneProductId": {
+        "type": "generated",
+        "generator": "guid",
+        "replaces": "$guid9$"
+      },
+      "nameToLower":{
+      "type": "generated",
+      "generator": "casing",
+      "parameters": {
+        "source" : "name",
+        "toLower": true
+      }
+    },
+    "nameToAppId": {
+        "type": "generated",
+        "generator": "regex",
+        "dataType": "string",
+        "parameters": {
+          "source": "nameToLower",
+          "steps": [
+            {
+              "regex": "[^a-z0-9_\\.]",
+              "replacement": ""
+            }
+          ]
+        }
+      },
+      "defaultAppId":{
+      "type": "generated",
+      "generator": "join",
+      "parameters": {
+        "symbols": [
+          {
+            "type": "const",
+            "value": "com.companyname."
+          },
+          {
+            "type": "ref",
+            "value": "nameToAppId"
+          }
+        ]
+      }
+    },
+    "finalAppId":{
+      "type":"generated",
+      "generator": "coalesce",
+      "parameters": {
+        "sourceVariableName": "applicationId",
+        "fallbackVariableName": "defaultAppId"
+      },
+      "replaces": "com.companyname.mauiapp"
+    }
+  },
+  "defaultName": "MauiApp1"
+}

src/Templates/src/templates/maui-multihead/MauiApp.1.Droid/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.companyname.mauiapp" android:versionCode="1" android:versionName="1.0">
+	<application android:allowBackup="true" android:icon="@mipmap/appicon" android:roundIcon="@mipmap/appicon_round" android:label="@string/app_name" android:supportsRtl="true"></application>
+	<uses-permission android:name="android.permission.INTERNET" />
+	<uses-permission android:name="android.permission.INTERNET" />
+</manifest>

src/Templates/src/templates/maui-multihead/MauiApp.1.Droid/Assets/AboutAndroidAssets.txt

@@ -0,0 +1,19 @@
+Any raw assets you want to be deployed with your application can be placed in
+this directory (and child directories) and given a Build Action of "AndroidAsset".
+
+These files will be deployed with your package and will be accessible using Android's
+AssetManager, like this:
+
+public class ReadAsset : Activity
+{
+    protected override void OnCreate (Bundle bundle)
+    {
+        base.OnCreate (bundle);
+
+        InputStream input = Assets.Open ("my_asset.txt");
+    }
+}
+
+Additionally, some Android functions will automatically load asset files:
+
+Typeface tf = Typeface.CreateFromAsset (Context.Assets, "fonts/samplefont.ttf");

src/Templates/src/templates/maui-multihead/MauiApp.1.Droid/MainActivity.cs

@@ -0,0 +1,10 @@
+using Android.App;
+using Android.Content.PM;
+using Android.OS;
+
+namespace MauiApp._1.Droid;
+
+[Activity(Theme = "@style/Maui.SplashTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize | ConfigChanges.Density)]
+public class MainActivity : MauiAppCompatActivity
+{
+}

src/Templates/src/templates/maui-multihead/MauiApp.1.Droid/MainApplication.cs

@@ -0,0 +1,15 @@
+using Android.App;
+using Android.Runtime;
+
+namespace MauiApp._1.Droid;
+
+[Application]
+public class MainApplication : MauiApplication
+{
+	public MainApplication(IntPtr handle, JniHandleOwnership ownership)
+		: base(handle, ownership)
+	{
+	}
+
+	protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+}

src/Templates/src/templates/maui-multihead/MauiApp.1.Droid/MauiMultiHeadApp.Droid.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+	<PropertyGroup>
+		<TargetFramework>net7.0-android</TargetFramework>
+		<SupportedOSPlatformVersion>21.0</SupportedOSPlatformVersion>
+		<OutputType>Exe</OutputType>
+		<Nullable>enable</Nullable>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<UseMaui>true</UseMaui>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<PackageReference Include="Microsoft.Maui.Controls" Version="$(MauiVersion)" />
+		<PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="$(MauiVersion)" />
+		<PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="MS_EXT_LOG_DEBUG_VERSION" />
+	</ItemGroup>
+
+	<ItemGroup>
+		<ProjectReference Include="..\MauiApp.1\MauiApp.1.csproj" />
+	</ItemGroup>
+
+</Project>

src/Templates/src/templates/maui-multihead/MauiApp.1.Droid/MauiProgram.cs

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+namespace MauiApp._1.Droid;
+
+public static class MauiProgram
+{
+	public static MauiApp CreateMauiApp()
+	{
+		var builder = MauiApp.CreateBuilder();
+
+		builder
+			.UseSharedMauiApp();
+
+		return builder.Build();
+	}
+}