why is android O devices needs to be set as foreground service?

[Ganime422]

Hello

I want to use this lib instead this one:
https://github.com/eclipse/paho.mqtt.android
because I had the Targeting S+ (version 10000 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. error.

In here I saw that it is needed to add this line for android O devices:

val client = MqttAndroidClient(context, uri, clientId).apply {
    setForegroundService(foregroundNotification, 3)
}

1. why is this needed? what is the foregraound service means and do I need to do any other refactroing to my code except for this?
2. what is the foregroundNotification variable? I don't use anything like it curently

thanks!

[hannesa2]

https://developer.android.com/about/versions/oreo/android-8.0-changes#back-all
https://developer.android.com/guide/components/foreground-services

You can give https://github.com/hannesa2/paho.mqtt.android/releases/tag/3.4.0-beta7 a try. It's without foreground-services

[hannesa2]

eclipse-paho/paho.mqtt.android#418
eclipse-paho/paho.mqtt.android#274
eclipse-paho/paho.mqtt.android#195

[Ganime422]

I don't mind use it as a foregroun service if it's needed
but I currently don't know what to put inside this foregroundNotification since I don't use it in my app.
what should I put inside of it or can I just put null?

[hannesa2]

Please have a look in the code. It's a running sample