Fullscreen as3 command not working when publishing apk

Hi, 

I've been using Flash/Animate for several years.

It seems that these command lines don't work anymore :

stage.displayState = StageDisplayState.FULL_SCREEN_INTERACTIVE;
stage.scaleMode = StageScaleMode.EXACT_FIT;

What I want to do is displaying the app in fullscreen with no status bar, and no dock at the bottom of the screen.

Does anyone have an answer to fix this issue ? Thanks a lot