title: Design lib - CoordinatorLayout/CollapsingToolbarLayout with GridView/listView
body: <p>This might be silly question but I didn't understand Design lib well. I am following <a href="https://github.com/chrisbanes/cheesesquare/blob/master/app/src/main/res/layout/activity_detail.xml" rel="noreferrer">this reference</a> to create below layout. The Blue area should work as parallax when I scroll the <code>GridView</code>.
  But when I scroll grid View nothing happens in AppBarLayout. </p>
  
  <p>But This works with <code>NestedScrollView</code> and <code>RecyclerView</code></p>
  
  <p><img src="https://i.stack.imgur.com/RCdwJ.png" alt="Layout"></p>
  
  <p>Below is My Layout file-</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/main_content"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:fitsSystemWindows="true"&gt;
  &lt;android.support.design.widget.AppBarLayout
      android:id="@+id/appbar"
      android:layout_width="match_parent"
      android:background="#500403"
      android:layout_height="@dimen/detail_backdrop_height"
      android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
      android:fitsSystemWindows="true"&gt;
  
      &lt;android.support.design.widget.CollapsingToolbarLayout
          android:id="@+id/collapsing_toolbar"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:background="#122453"
          app:layout_scrollFlags="scroll|exitUntilCollapsed"
          android:fitsSystemWindows="true"
          app:contentScrim="?attr/colorPrimary"
          app:expandedTitleMarginStart="48dp"
          app:expandedTitleMarginEnd="64dp"&gt;
  
  
          &lt;ImageView
              android:id="@+id/backdrop"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:scaleType="centerCrop"
              android:fitsSystemWindows="true"
              app:layout_collapseMode="parallax" /&gt;
          &lt;ImageView
              android:id="@+id/backdrop1"
              android:layout_width="50dp"
              android:layout_height="50dp"
              android:scaleType="fitCenter"
              android:fitsSystemWindows="true"
              android:layout_gravity="center"
              android:src="@drawable/bar_offline"
              app:layout_collapseMode="parallax" /&gt;
  
  
          &lt;android.support.v7.widget.Toolbar
              android:id="@+id/toolbar"
              android:layout_width="match_parent"
              android:layout_height="?attr/actionBarSize"
              android:background="#982223"
              app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
              app:layout_collapseMode="pin" /&gt;
      &lt;/android.support.design.widget.CollapsingToolbarLayout&gt;
  &lt;/android.support.design.widget.AppBarLayout&gt;
  
    &lt;GridView
        android:id="@+id/grid"
        android:numColumns="4"
        android:background="#367723"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        /&gt;
  &lt;android.support.design.widget.FloatingActionButton
      android:layout_height="wrap_content"
      android:layout_width="wrap_content"
      app:layout_anchor="@id/appbar"
      app:layout_anchorGravity="bottom|right|end"
      android:src="@drawable/bar_offline"
      android:layout_margin="@dimen/fab_margin"
      android:clickable="true"/&gt;
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>Any help would be appreciated.</p>