Sonos Android app goes to sleep

the only way you can set up a 4 hour before lock, is if your phone has smart lock feature. and add your home to trusted places. But you need to have gps on. It will not lock the phone for 4 hours if it knows you are at a trusted place.

OK - thnx for the advice anyway, you remember I said . . . .
"The stations from DI.FM (RadioTunes, RockRadio etc) can only be access through "Tunein URL's" but these apps (when played natively) do not go to sleep. I have an enforced unlock requirement when my phone sleeps, so its quite annoying"
So I know it can be done! - Sonos just need to add the feature within the app . . . .

OK - thnx for the advice anyway, you remember I said . . . .
"The stations from DI.FM (RadioTunes, RockRadio etc) can only be access through "Tunein URL's" but these apps (when played natively) do not go to sleep. I have an enforced unlock requirement when my phone sleeps, so its quite annoying"
So I know it can be done! - Sonos just need to add the feature within the app . . . .

The reason it does not lock on your phone, when playing natively is the phone knows it is using that app. On sonos, the phone only controls the sonos function of start, pause, and music selection. Once that is pick, all the streaming goes through sonos. So the phone thinks the tune in app is no longer in uses. I would also disable monitoring or optimize on the tune in app as well.

But the sonos app goes to sleep on the phone unless you change the settings.

Try installing WMA player app on huawei, it helped for my case.