New vector asset in drawable folder can't be called from xml
<p>So, basically I'm creating a new Vector Asset using a particular material icon (in this case navigation menu icon).</p>

<p>And after that, I want to try that new icon in my <code>FloatingActionButton</code>, but, silly enough, the asset I just created doesn't detected by Android Studio, and returned an error like the screenshot below.</p>

<p><a href="https://i.stack.imgur.com/YXIqd.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YXIqd.jpg" alt="enter image description here"></a></p>

<pre><code>&lt;android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    android:src="@android:drawable/ic_menu_white_24dp" /&gt;
</code></pre>

<p>I also tried to add <code>.xml</code> to the end of the code and copying the file reference and pasted it in the code, but both doesn't work.</p>

<hr>

<p>Then I decided to look at the error details, which is:</p>

<p><a href="https://i.stack.imgur.com/9AImS.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9AImS.jpg" alt="enter image description here"></a></p>

<pre><code>java.lang.NumberFormatException: Color value '@android:drawable/ic_menu_white_24dp' must start with #
</code></pre>

<hr>

<p>And then I think, "oh! maybe I forgot the #". So, I opened the xml file, only to find that I already wrote the #.</p>

<p><a href="https://i.stack.imgur.com/PDUeg.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PDUeg.jpg" alt="enter image description here"></a></p>

<pre><code>&lt;vector xmlns:android="http://schemas.android.com/apk/res/android"
    android:width="24dp"
    android:height="24dp"
    android:viewportWidth="24.0"
    android:viewportHeight="24.0"&gt;

    &lt;path android:fillColor="#FFFFFF" 
          android:pathData="M3,18h18v-2L3,16v2zM3,13h18v-2L3,11v2zM3,6v2h18L21,6L3,6z"/&gt;
&lt;/vector&gt;
</code></pre>

<hr>

<p><strong>So, is there anyone find what did I do wrong? I'm new to AS, and Android Dev, so I might missed something silly though.</strong></p>

<p>P.S. I also tried to reopen Android Studio, and rebuild my project, but it's no good. </p>

<p>P.S.S. I'm using Android Studio 2.1</p>