title: AppBarLayout transparency
body: <p>I've been playing around with AppBarLayout, but I can't find a way to make it's background transparent.</p>
  
  <p>Here what i mean:</p>
  
  <p><a href="https://i.stack.imgur.com/5ha0X.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5ha0X.png" alt="enter image description here"></a></p>
  
  <p>And here is my XML:</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"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:fitsSystemWindows="true"
      tools:context=".MainActivity"&gt;
  
  
      &lt;android.support.v7.widget.RecyclerView
          android:id="@+id/recycler"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:overScrollMode="never"
          app:layout_behavior="@string/appbar_scrolling_view_behavior" /&gt;
  
      &lt;android.support.design.widget.AppBarLayout
          android:id="@+id/appbar"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          app:elevation="0dp"
          android:background="@android:color/transparent"&gt;
  
          &lt;TextView
              android:id="@+id/toolbar"
              app:elevation="0dp"
              android:text="hey"
              android:textColor="@android:color/white"
              android:layout_width="match_parent"
              android:layout_height="45dp"
              android:background="#8000CDFE"
              app:layout_scrollFlags="scroll|enterAlways"/&gt;
  
      &lt;/android.support.design.widget.AppBarLayout&gt;
  
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>As you can see I am using color #8000CDFE which should give me 50% transparency, but for some reason it doesn't. I've tried setting transparent background to AppBarLayout, but it also doesn't help much. </p>
  
  <p>Has anybody encountered this problem? Is there anyway to assign transparent colors to AppBarLayout and its' siblings?</p>
  
  <p>Thanks.</p>