Good question, that’s an advanced topic: In order to use immersive mode you have to subclass the default Android activity and add some flags:
- Create a new activity in your andrdoid/src folder subclassing QtActivity (or VPlayActivity if you’re using V-Play plugins)
- Set the new activity as “android:name” in your AndroidManifest.xml’s activity declaration
- Override the onCreate and / or onWindowFocusChanged methods in your custom activity and add the flags as described here: https://developer.android.com/training/system-ui/immersive.html (or here for advanced usage: http://vitiy.info/small-guide-how-to-support-immersive-mode-under-android-4-4/). Make sure to call the super methods for all overridden methods.
Let us know if that worked for you!