int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE;
        getWindow().getDecorView().setSystemUiVisibility(uiOptions);	
        
        View decorView = getWindow().getDecorView();
        int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_FULLSCREEN
                | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
        decorView.setSystemUiVisibility(uiOptions);        	
		
		

Android API 30

		
        WindowInsetsController controller = getWindow().getDecorView().getWindowInsetsController();
        controller.hide(WindowInsets.Type.statusBars());
        controller.hide(WindowInsets.Type.navigationBars());
        controller.hide(WindowInsets.Type.systemBars());