Prepared chat application sample

ChatApplication/ChatApplication.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.12.35521.163 d17.12
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ChatApplication", "ChatApplication\ChatApplication.csproj", "{6BE82A5A-80DD-4553-A26D-FF454EB100EE}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{6BE82A5A-80DD-4553-A26D-FF454EB100EE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6BE82A5A-80DD-4553-A26D-FF454EB100EE}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6BE82A5A-80DD-4553-A26D-FF454EB100EE}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6BE82A5A-80DD-4553-A26D-FF454EB100EE}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

ChatApplication/ChatApplication/App.xaml

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+<?xml version = "1.0" encoding = "UTF-8" ?>
+<Application xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:local="clr-namespace:ChatApplication"
+             x:Class="ChatApplication.App">
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="Resources/Styles/Colors.xaml" />
+                <ResourceDictionary Source="Resources/Styles/Styles.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

ChatApplication/ChatApplication/App.xaml.cs

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+namespace ChatApplication
+{
+    public partial class App : Application
+    {
+        public App()
+        {
+            InitializeComponent();
+        }
+
+        protected override Window CreateWindow(IActivationState? activationState)
+        {
+            return new Window(new AppShell());
+        }
+    }
+}

ChatApplication/ChatApplication/AppShell.xaml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<Shell
+    x:Class="ChatApplication.AppShell"
+    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+    xmlns:local="clr-namespace:ChatApplication"
+    Shell.FlyoutBehavior="Flyout"
+    Title="ChatApplication">
+
+    <ShellContent
+        ContentTemplate="{DataTemplate local:MainPage}"
+        Route="MainPage" />
+
+</Shell>

ChatApplication/ChatApplication/AppShell.xaml.cs

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+namespace ChatApplication
+{
+    public partial class AppShell : Shell
+    {
+        public AppShell()
+        {
+            InitializeComponent();
+        }
+    }
+}

ChatApplication/ChatApplication/ChatApplication.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+	<PropertyGroup>
+		<TargetFrameworks>net9.0-android;net9.0-ios;net9.0-maccatalyst</TargetFrameworks>
+		<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net9.0-windows10.0.19041.0</TargetFrameworks>
+		<!-- Uncomment to also build the tizen app. You will need to install tizen by following this: https://github.com/Samsung/Tizen.NET -->
+		<!-- <TargetFrameworks>$(TargetFrameworks);net9.0-tizen</TargetFrameworks> -->
+
+		<!-- Note for MacCatalyst:
+		The default runtime is maccatalyst-x64, except in Release config, in which case the default is maccatalyst-x64;maccatalyst-arm64.
+		When specifying both architectures, use the plural <RuntimeIdentifiers> instead of the singular <RuntimeIdentifier>.
+		The Mac App Store will NOT accept apps with ONLY maccatalyst-arm64 indicated;
+		either BOTH runtimes must be indicated or ONLY macatalyst-x64. -->
+		<!-- For example: <RuntimeIdentifiers>maccatalyst-x64;maccatalyst-arm64</RuntimeIdentifiers> -->
+
+		<OutputType>Exe</OutputType>
+		<RootNamespace>ChatApplication</RootNamespace>
+		<UseMaui>true</UseMaui>
+		<SingleProject>true</SingleProject>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>
+
+		<!-- Display name -->
+		<ApplicationTitle>ChatApplication</ApplicationTitle>
+
+		<!-- App Identifier -->
+		<ApplicationId>com.companyname.chatapplication</ApplicationId>
+
+		<!-- Versions -->
+		<ApplicationDisplayVersion>1.0</ApplicationDisplayVersion>
+		<ApplicationVersion>1</ApplicationVersion>
+
+		<!-- To develop, package, and publish an app to the Microsoft Store, see: https://aka.ms/MauiTemplateUnpackaged -->
+		<WindowsPackageType>None</WindowsPackageType>
+
+		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'ios'">15.0</SupportedOSPlatformVersion>
+		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'maccatalyst'">15.0</SupportedOSPlatformVersion>
+		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'">21.0</SupportedOSPlatformVersion>
+		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</SupportedOSPlatformVersion>
+		<TargetPlatformMinVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">10.0.17763.0</TargetPlatformMinVersion>
+		<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'tizen'">6.5</SupportedOSPlatformVersion>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<!-- App Icon -->
+		<MauiIcon Include="Resources\AppIcon\appicon.svg" ForegroundFile="Resources\AppIcon\appiconfg.svg" Color="#512BD4" />
+
+		<!-- Splash Screen -->
+		<MauiSplashScreen Include="Resources\Splash\splash.svg" Color="#512BD4" BaseSize="128,128" />
+
+		<!-- Images -->
+		<MauiImage Include="Resources\Images\*" />
+		<MauiImage Update="Resources\Images\dotnet_bot.png" Resize="True" BaseSize="300,185" />
+
+		<!-- Custom Fonts -->
+		<MauiFont Include="Resources\Fonts\*" />
+
+		<!-- Raw Assets (also remove the "Resources\Raw" prefix) -->
+		<MauiAsset Include="Resources\Raw\**" LogicalName="%(RecursiveDir)%(Filename)%(Extension)" />
+	</ItemGroup>
+
+	<ItemGroup>
+		<PackageReference Include="Microsoft.Maui.Controls" Version="9.0.21" />
+		<PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="9.0.0" />
+		<PackageReference Include="Syncfusion.Maui.ListView" Version="*" />
+	</ItemGroup>
+
+</Project>

ChatApplication/ChatApplication/MainPage.xaml

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+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:listView="clr-namespace:Syncfusion.Maui.ListView;assembly=Syncfusion.Maui.ListView"
+             xmlns:local="clr-namespace:ChatApplication"
+             x:Class="ChatApplication.MainPage">
+
+    <ContentPage.BindingContext>
+        <local:ViewModel/>
+    </ContentPage.BindingContext>
+
+    <ContentPage.Resources>
+        <ResourceDictionary>
+            <DataTemplate x:Key="IncomingMessage">
+                <Grid Padding="10,5">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="Auto"/>
+                        <ColumnDefinition Width="*"/>
+                    </Grid.ColumnDefinitions>
+
+                    <Image WidthRequest="40" HeightRequest="40" HorizontalOptions="Start"
+                           VerticalOptions="Start" Margin="5"
+                           Source="{Binding ProfilePicture}">
+                    </Image>
+
+                    <StackLayout Grid.Column="1" Orientation="Vertical" Padding="5,0">
+                        <Label Text="{Binding Name}" TextColor="Gray" FontSize="12"
+                               FontAttributes="Bold" HorizontalOptions="Start"/>
+                        <Label Text="{Binding Text}" TextColor="Black" BackgroundColor="LightGray"
+                               Padding="10" MaximumWidthRequest="250"
+                               HorizontalOptions="StartAndExpand" VerticalOptions="Center"/>
+                        <Label Text="{Binding Timestamp, StringFormat='{0:HH:mm}'}"
+                               TextColor="Gray" FontSize="10" HorizontalOptions="Start"/>
+                    </StackLayout>
+                </Grid>
+            </DataTemplate>
+
+            <DataTemplate x:Key="OutgoingMessage">
+                <Grid Padding="10,5">
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="*" />
+                        <ColumnDefinition Width="Auto" />
+                        <ColumnDefinition Width="Auto"/>
+                    </Grid.ColumnDefinitions>
+
+                    <StackLayout Grid.Column="1" Orientation="Vertical" Padding="5,0" 
+                                 VerticalOptions="CenterAndExpand">
+                        <Label Text="{Binding Name}" TextColor="Gray" FontSize="12"
+                               FontAttributes="Bold" HorizontalOptions="End" />
+                        <Label Text="{Binding Text}" TextColor="White" 
+                               BackgroundColor="DodgerBlue" Padding="10" 
+                               HorizontalOptions="EndAndExpand" VerticalOptions="Center"
+                               MaximumWidthRequest="250" />
+                        <Label Text="{Binding Timestamp, StringFormat='{0:HH:mm}'}"
+                               TextColor="Gray" FontSize="10" HorizontalOptions="End"/>
+                    </StackLayout>
+
+                    <Image Grid.Column="2" WidthRequest="40" HeightRequest="40" Margin="5"
+                           HorizontalOptions="End" VerticalOptions="Start"
+                           Source="{Binding ProfilePicture}">
+                    </Image>
+                </Grid>
+            </DataTemplate>
+
+            <local:MyDataTemplateSelector x:Key="dataTemplateSelector"
+                                          IncomingDataTemplate="{StaticResource IncomingMessage}"
+                                          OutgoingDataTemplate="{StaticResource OutgoingMessage}"/>
+        </ResourceDictionary>
+    </ContentPage.Resources>
+
+    <listView:SfListView ItemsSource="{Binding Messages}"
+                         ItemTemplate="{StaticResource dataTemplateSelector}"
+                         AutoFitMode="Height">
+    </listView:SfListView>
+
+</ContentPage>

ChatApplication/ChatApplication/MainPage.xaml.cs

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+using System.Collections.ObjectModel;
+
+namespace ChatApplication
+{
+    public partial class MainPage : ContentPage
+    {        
+        public MainPage()
+        {
+            InitializeComponent();
+        }
+    }
+
+    public class Message
+    {
+        public string? Name { get; set; }
+        public string? Text { get; set; }
+        public bool IsIncoming { get; set; }
+        public string? ProfilePicture { get; set; }
+        public DateTime Timestamp { get; set; }
+    }
+
+    public class ViewModel
+    {
+        public ObservableCollection<Message> Messages { get; set; }
+
+        public ViewModel()
+        {
+            Messages = new ObservableCollection<Message>
+            {
+                new Message { Name = "You", Text = "Hi everyone! I'm very excited to share the news that our team is launching a new mobile application.", IsIncoming = false, ProfilePicture = "andrea.png", Timestamp = DateTime.Now.AddMinutes(-2)},
+                new Message { Name = "Harrison", Text = "Oh, that's great!", IsIncoming = true, ProfilePicture = "harrison.png", Timestamp = DateTime.Now.AddMinutes(-1)},
+                new Message { Name = "Margaret", Text = "That is a good news.", IsIncoming = true, ProfilePicture = "margaret.png", Timestamp = DateTime.Now.AddMinutes(2)},
+                new Message { Name = "Nancy", Text = "Are we going to develop the app natively or as a hybrid?", IsIncoming = true, ProfilePicture = "nancy.png", Timestamp = DateTime.Now.AddMinutes(3)},
+                new Message { Name = "You", Text = "We should develop this app using .NET MAUI, as it offers a native experience and performance while allowing for seamless cross-platform development.", IsIncoming = false, ProfilePicture = "andrea.png", Timestamp = DateTime.Now.AddMinutes(5)},
+                new Message { Name = "Steven", Text = "I haven't heard of .NET MAUI. What's .NET MAUI?", IsIncoming = true, ProfilePicture = "steven.png", Timestamp = DateTime.Now.AddMinutes(7)},
+                new Message { Name = "You", Text = ".NET MAUI is a new library that allows you to build native user interfaces for Android, iOS, macOS, and Windows from a single shared C# codebase.", IsIncoming = false, ProfilePicture = "andrea.png", Timestamp = DateTime.Now.AddMinutes(9)},
+                new Message { Name = "David", Text = "That's impressive.", IsIncoming = true, ProfilePicture = "david.png", Timestamp = DateTime.Now.AddMinutes(10)},
+            };
+        }
+    }
+
+    public class MyDataTemplateSelector : DataTemplateSelector
+    {
+        public DataTemplate? IncomingDataTemplate { get; set; }
+        public DataTemplate? OutgoingDataTemplate { get; set; }
+        protected override DataTemplate OnSelectTemplate(object item, BindableObject container)
+        {
+            if (item is Message message)
+            {
+                return message.IsIncoming ? IncomingDataTemplate : OutgoingDataTemplate;
+            }
+
+            return null;
+        }
+    }
+}

ChatApplication/ChatApplication/MauiProgram.cs

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+using Microsoft.Extensions.Logging;
+using Syncfusion.Maui.Core.Hosting;
+
+namespace ChatApplication
+{
+    public static class MauiProgram
+    {
+        public static MauiApp CreateMauiApp()
+        {
+            var builder = MauiApp.CreateBuilder();
+            builder
+                .UseMauiApp<App>()
+                .ConfigureSyncfusionCore()
+                .ConfigureFonts(fonts =>
+                {
+                    fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
+                    fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
+                });
+
+#if DEBUG
+    		builder.Logging.AddDebug();
+#endif
+
+            return builder.Build();
+        }
+    }
+}

ChatApplication/ChatApplication/Platforms/Android/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+	<application android:allowBackup="true" android:icon="@mipmap/appicon" android:roundIcon="@mipmap/appicon_round" android:supportsRtl="true"></application>
+	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+	<uses-permission android:name="android.permission.INTERNET" />
+</manifest>

ChatApplication/ChatApplication/Platforms/Android/MainActivity.cs

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

ChatApplication/ChatApplication/Platforms/Android/MainApplication.cs

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

ChatApplication/ChatApplication/Platforms/Android/Resources/values/colors.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#512BD4</color>
+    <color name="colorPrimaryDark">#2B0B98</color>
+    <color name="colorAccent">#2B0B98</color>
+</resources>

ChatApplication/ChatApplication/Platforms/MacCatalyst/AppDelegate.cs

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+using Foundation;
+
+namespace ChatApplication
+{
+    [Register("AppDelegate")]
+    public class AppDelegate : MauiUIApplicationDelegate
+    {
+        protected override MauiApp CreateMauiApp() => MauiProgram.CreateMauiApp();
+    }
+}

ChatApplication/ChatApplication/Platforms/MacCatalyst/Entitlements.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+    <!-- See https://aka.ms/maui-publish-app-store#add-entitlements for more information about adding entitlements.-->
+    <dict>
+        <!-- App Sandbox must be enabled to distribute a MacCatalyst app through the Mac App Store. -->
+        <key>com.apple.security.app-sandbox</key>
+        <true/>
+        <!-- When App Sandbox is enabled, this value is required to open outgoing network connections. -->
+        <key>com.apple.security.network.client</key>
+        <true/>
+    </dict>
+</plist>
+