"REALLY" fullscreen window in Android

Hello everyone.
This is my first post on this cool forum!

I’m trying to solve a problem with a fullscreen window.
Now, the Android processing app is not fullscreen.
The upper part is ActionBar black.

In Android Studio I’m trying to change this and extend the window to full screen “really full” by keeping the ActionBar.

I’m trying to remove it and enlarge the window to really full screen.

I set the Theme, I set the flags I know. And it succeeds (not quite).
The ActionBar disappears, it’s transparent (as in screenshots),
…but the window itself remains the same size, it doesn’t expand, it’s not fullscreen.

Action Bar is translucent , behind it is my phone wallpaper
ActionBar is hidded, but window size not changed

Do I have to change something in…
PFragment.class here? …or what else to set?
Please give me some advice if anyone has already faced this problem.

MainActivity set all know me flags :
(transculen, fullscreen, no actionbar theme in style… added to Activity)

  protected void onCreate(Bundle savedInstanceState) {

    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);

    View decorView = getWindow().getDecorView();
                    | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_FULLSCREEN);

    FrameLayout frame = new FrameLayout(this);
    setContentView(frame, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));


    sketch = new AAA();
    PFragment fragment = new PFragment(sketch);
    fragment.setView(frame, this);


Please see if this works using Processing IDE:

void setup() {

void draw() {  


Thanks for reply, but it’s not a problem with : fullScreen();

I mean,“really” full screen, Full screen is when ActionBar will be hided, and ALL phone area (1080x2400) will be processing app window, now app is on top smaller, because ActionBar is on top…

If the ActionBar is hidden, the window should cover the entire display area.

In another my App’s (Android) I set Theme to MainActivity and works fine, but in Processing App (with PFragment) not works …

If You export any Procesing App or compile it to Android App you have - top black ActionBar - not full screen App window

… it’s not problem witch the sketch … but Thanks

This is what is in AndroidManifest.xml on my Mac:

Unfortunately I can no longer use ‘Export Signed Package’ (due to some gradle error) to see if it has an action bar or not. According to the Manifest it should not have one.

The following image is from a previously exported app from the Processing IDE and I don’t see an action bar: