title: color value drawable resource issue
body: <p>I have an image that is 1900*1200 in a folder called drawable-sw600dp that id like to have used on a nexus 7. When I try to run the app the main activity the screen is white and I get the following error:</p>
  
  <pre><code>java.lang.NumberFormatException: Color value '@drawable-sw600dp/background5' must start with #
  at com.android.layoutlib.bridge.impl.ResourceHelper.getColor(ResourceHelper.java:71)
  at com.android.layoutlib.bridge.impl.ResourceHelper.getDrawable(ResourceHelper.java:248)
  at android.content.res.BridgeTypedArray.getDrawable(BridgeTypedArray.java:782)
  </code></pre>
  
  <p>Could it be that the image is too large to use? Or what could cause this error to happen?</p>
  
  <p>This is in my activity_main.xml where the background is set:</p>
  
  <p>
  
  <pre><code>xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="@drawable/background5"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:id="@+id/MainLayout"
  tools:context=".MainActivity"&gt;
  </code></pre>
  
  <p>In my other folders drawable-hdpi,-mdpi there is no problem. However I made the .jpg image a higher resolution and now it creates this error, thats why I suspect the high resolution is causing the issue.</p>