/*
    *  decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN
    *            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
    *            | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
    *            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
    *            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
    *            | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
    */