title: SwipeRefreshLayout with WebView in CoordinatorLayout
body: <p>This is my xml layout:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      android:id="@+id/coordinatorLayout"
      android:layout_width="match_parent"
      android:layout_height="match_parent"&gt;
  
      &lt;android.support.design.widget.AppBarLayout
          android:id="@+id/appBarLayout"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"&gt;
              &lt;include
                  android:id="@+id/toolbar"
                  layout="@layout/tool_bar"
                  android:layout_width="match_parent"
                  android:layout_height="?attr/actionBarSize"
                  app:layout_scrollFlags="scroll|enterAlways" /&gt;
      &lt;/android.support.design.widget.AppBarLayout&gt;
  
      &lt;android.support.v4.widget.SwipeRefreshLayout
          android:id="@+id/swipeContainer"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          app:layout_behavior="@string/appbar_scrolling_view_behavior"&gt;
  
          &lt;WebView
              android:id="@+id/web_view"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              /&gt;
  
      &lt;/android.support.v4.widget.SwipeRefreshLayout&gt;
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>Unfortunately, the toolbar is not hiding when webView scrolling.</p>
  
  <p>How do I use a WebView with SwipeRefreshLayout and hideable toolbar?</p>
  
  <p>Sorry for my English.</p>