I just tried it with the 2 lines of code shown here:
Where is API call to do "lights out mode" in honeycomb?
View v = findViewById(R.id.view_id);
v.setSystemUiVisibility(View.STATUS_BAR_HIDDEN);
And it has no effect for me.
Tried it with several views of my layout. Any Idea what I am doing wrong here? Are there any conditions I have to meet to get the effect I want?