title: Android webview : detect scroll
body: <p>I need to know how to detect if the user can't scroll anymore in a webView. I want to generate an action when the user swipes to the left or right, but only if the user can't scroll:</p>
  
  <pre><code>IF the user swipes to the left AND the webview can't scroll to left THEN
   do something
  ELSE
   let the webview scroll
  </code></pre>