title: Menu and Autohide FloatingActionButton of Android Design Support Library
body: <p>I'm using Android Design Support Library and I want a FloatingActionButton that have AutoHide by Scrolling, </p>
  
  <p>my Layout is:</p>
  
  <pre><code>&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:layout_width="match_parent"
      android:layout_height="match_parent"&gt;
  
      &lt;ScrollView
          android:id="@+id/scrollView"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"&gt;
  
  
          &lt;TextView
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="@string/LargeText" /&gt;
      &lt;/ScrollView&gt;
  
      &lt;android.support.design.widget.FloatingActionButton
          android:id="@+id/fab"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          app:layout_anchorGravity="bottom|right|end"
          app:layout_anchor="@id/scrollView"
          android:src="@drawable/abc_btn_rating_star_off_mtrl_alpha" /&gt;
  
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>FloatingActionButton always showing when scrolling text, i want to autohide it when scrolling text.</p>
  
  <p>And, I want to have a FloatingActionButton Menu by clicking on FloatingActionButton, like this:</p>
  
  <p><img src="https://i.stack.imgur.com/1CLgK.png" alt="enter image description here"></p>