private void delayedHide(int delayMillis) {
        mHideHandler.removeCallbacks(mHideRunnable);
        mHideHandler.postDelayed(mHideRunnable, delayMillis);
    }
Schedules a call to hide() in delay milliseconds, canceling any
previously scheduled calls.
app/src/main/java/home/smart/fly/animations/webview/FullscreenPage.java