A notification of the foreground service doesn't show on Android 8.+

Question

My foreground service doesn\'t show a notification when it works on Android Oreo.

It works perfectly on Android versions from 15 to 25. When I do targetSdkVersion<

Answer 1

Step #1: Set project.ext.supportLibVersion to 26.1.0 or higher

Step #2: Note that you are now getting deprecation warnings on all your new NotificationCompat.Builder() calls

Step #3: Define a NotificationChannel (if you have not defined it on some previous run of the app)

Step #4: Pass the channel ID to the NotificationCompat.Builder constructor