Background service stops on Android Marshmallow 6.0+ devices

Question

When app goes in background (by pressing home button). When screen goes off, after 15-20 mins the background service stops on Android M (6.0) phone. Although it works fine on phone with Lollipop (5.0).

Answer 1

Android M introduced Doze and App Standby which limits background services in order to preserve battery. How to handle Doze can be found in this official android training manual.

edit: Although not part of the original question, if you want to support Android O you will also have to keep the new Background Execution Limits in mind. How to do this can be found in this official android training manual.