private void setUpWebView() {
        WebView mWebView = (WebView) mContentView;
        WebSettings settings = mWebView.getSettings();
        settings.setJavaScriptEnabled(true);
        settings.setUseWideViewPort(false);
        WebView.setWebContentsDebuggingEnabled(true);
        mWebView.loadUrl("file:///android_asset/keyframe.html");
    }
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/webview/FullscreenPage.java