@Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);

        // Trigger the initial hide() shortly after the activity has been
        // created, to briefly hint to the user that UI controls
        // are available.
        delayedHide(100);
    }
Touch listener to use for in-layout UI controls to delay hiding the
system UI. This is to prevent the jarring behavior of controls going away
while interacting with activity UI.
app/src/main/java/home/smart/fly/animations/ui/activity/FullscreenActivity.java