title: Cannot resolve symbol error for XML reference to drawable in Android Studio in Mac
body: <p>I'm brand new to Android Studio and fairly new to development, so I might be missing something simple. </p>
  
  <p>I am trying to import the ic_action_search.png from the Action Bar Icon pack. I've downloaded the Action bar Icon pack, selected the 4 directories containing the images (drawable-hdpi, drawable-mdpi, etc) and copied and pasted them into Android studio. </p>
  
  <p>But in my menue_my.xml file I get a </p>
  
  <blockquote>
    <p>Cannot resolve symbol error</p>
  </blockquote>
  
  <p>at the line <code>android:icon="@drawable/ic_action_search"</code></p>
  
  <p>Here is a screenshot of my android studio with the xml file </p>
  
  <p><img src="https://i.stack.imgur.com/p5sD5.png" alt="enter image description here"></p>
  
  <p>I added the png's in project mode, and have tried build>clean and build>rebuild with no success. </p>
  
  <p>When viewing the file structure in "Project" or "Packages" the drawable files appear to be there but not when the file structure is viewed from "Android". Also I don't seem to be able to paste the drawable files into the res folder while in viewing the file structure in "Android". </p>