How to create an Android foreground service in MAUI

Question

I'm trying to create a foreground service in MAUI (using .NET 6) for an Android app, but currently, there are no tutorials (that I could find) on achieving this.

What would be the best starting point to add a foreground service or how would you create it?

Answer 1

You can create the ForegroundService \Platform\Android and then start it in the page.cs.

I have done a sample and start it successfully, you can have a try.

In the \Platform\Android\ForegroundServiceDemo:

namespace MauiAppTest.Platform.Android
{
[Service]
public class ForegroundServiceDemo : Service
{
    private string NOTIFICATION_CHANNEL_ID = "1000";
    private int NOTIFICATION_ID = 1;
    private string NOTIFICATION_CHANNEL_NAME = "notification";

    private void startForegroundService()
    {
        var notifcationManager = GetSystemService(Context.NotificationService) as NotificationManager;

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

        var notification = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
        notification.SetAutoCancel(false);
        notification.SetOngoing(true);
        notification.SetSmallIcon(Resource.Mipmap.appicon);
        notification.SetContentTitle("ForegroundService");
        notification.SetContentText("Foreground Service is running");
        StartForeground(NOTIFICATION_ID, notification.Build());
    }

    private 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.NotSticky;
    }
}
}

And in the page.cs:

 private void OnStartServiceClicked(object sender, EventArgs e)
{
#if ANDROID
    Android.Content.Intent intent = new Android.Content.Intent(Android.App.Application.Context,typeof(ForegroundServiceDemo));
    Android.App.Application.Context.StartForegroundService(intent);
#endif
}

Finally, add the foreground service permission into the AndroidManifest.xml:

<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>