How To Do A .NET MAUI Foreground Service For Android

ForegroundService.cs

using Android.App;
using Android.Content;
using Android.OS;

using AndroidX.Core.App;

namespace YourMAUIApp;

[Service]
public partial class MyForeGroundService : Service, IService
{
    public const string NOTIFICATION_CHANNEL_ID = "10276";
    private const int NOTIFICATION_ID = 10923;
    private const string NOTIFICATION_CHANNEL_NAME = "notification";

    private void StartForegroundService()
    {
        var intent = new Intent(Android.App.Application.Context, typeof(MainActivity));
        var pendingIntentFlags = Build.VERSION.SdkInt >= BuildVersionCodes.S
            ? PendingIntentFlags.UpdateCurrent |
              PendingIntentFlags.Mutable
            : PendingIntentFlags.UpdateCurrent;
        var pendingIntent = PendingIntent.GetActivity(Android.App.Application.Context, 0, intent, pendingIntentFlags);

        var notifcationManager = GetSystemService(NotificationService) as NotificationManager;

        if (Build.VERSION.SdkInt >= BuildVersionCodes.O)
        {
            CreateNotificationChannel(notifcationManager);
        }

        var notification = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
        notification.SetContentIntent(pendingIntent);
        notification.SetAutoCancel(false);
        notification.SetOngoing(true);
        notification.SetSmallIcon(Build.VERSION.SdkInt >= BuildVersionCodes.Tiramisu ? Resource.Drawable.ic_notification : Resource.Mipmap.appicon);
        notification.SetContentTitle("My Aoo");
        notification.SetContentText("My App Service is running");
        StartForeground(NOTIFICATION_ID, notification.Build());
    }

    private static void CreateNotificationChannel(NotificationManager notificationMnaManager)
    {
        var channel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, NOTIFICATION_CHANNEL_NAME,
            NotificationImportance.Low);
        notificationMnaManager.CreateNotificationChannel(channel);
    }

    public override IBinder OnBind(Intent intent)
    {
        return null;
    }


    public override StartCommandResult OnStartCommand(Intent intent, StartCommandFlags flags, int startId)
    {
        StartForegroundService();
        return StartCommandResult.Sticky;
    }

    public void Start()
    {
        var intent = new Intent(Android.App.Application.Context, typeof(MyForeGroundService));
        Android.App.Application.Context.StartForegroundService(intent);
    }

    public void Stop()
    {
        var intent = new Intent(Android.App.Application.Context, typeof(MyForeGroundService));
        Android.App.Application.Context.StopService(intent);
    }
}

HomePageView.xaml.cs

namespace YourMAUIApp;

public partial class HomePage : ContentPage
{
    public readonly HomeViewModel ViewModel;
    public IService Service { get; }

    public HomePage(IService _service)
    {
        InitializeComponent();

        ViewModel = new HomeViewModel();
        Service = _service;
        
   }
   
   private void Button_OnClicked(object sender, EventArgs e)
   {
      Service.Start();
   }
   
   private void StopButton_OnClicked(object sender, EventArgs e)
   {
      Service.Stop();
   }
}

IService.cs

namespace YourMAUIApp;

public interface IService
{
    void Start();
    void Stop();
}

MauiProgram.cs

namespace YourMAUIApp;

public static class MauiProgram
{
    public static IServiceProvider Services { get; private set; }

    public static MauiApp CreateMauiApp()
	{
		var builder = MauiApp.CreateBuilder();

        builder.Services.AddTransient<IService, MyForeGroundService>();
        builder.Services.AddTransient<HomePage>();
        builder
            .UseMauiApp<App>()
            .UseMauiCommunityToolkit()
            .UseMauiCommunityToolkitCore()
            .UseMauiCommunityToolkitMarkup()
            .ConfigureFonts(fonts =>
			      {
				        fonts.AddFont("Roboto-Regular.ttf", "RobotoRegular");
                
            })
            
        var app =  builder.Build();
        Services = app.Services;

        return app;
    }
}