How to activate task constipation from QT?

Question

Android

Good evening. I have an application written in QT 5.9 for android 5.1. I managed to assign the application as a system administrator, in order to enable the kiosk mode, you need to call startLockTask () in the Activity code, this is written in many places, but everyone does it on android studio, apparently, like for example here . How to achieve the cherished call and take possession of the device?