title: How to auto hide toolbar in webview fragments
body: <p>I am trying to auto hide toolbar when content is scroll down in webview. For this i have already tried <code>NestedScrollView</code>, but it cause height issues in webview, and google does not recommend to use <code>NestedScrollView</code> in webivew. I also can't use <code>Android-ObservableScrollView</code> because i am already using some custom libs in webview.</p>
  
  <p>Please help me out.</p>
  
  <p>Thanks!</p>