title: error: Attribute "***" has already been defined when using two library projects in Android
body: <p>I'm using <strong>android-support-v7-appcompat</strong> as a library in my Android project. Now I want to include <strong>actionbarsherlock</strong> as another library project. When I add the second library, it gives so many errors like below</p>
  
  <pre><code>android-support-v7-appcompat\res\values\attrs.xml:476: error: Attribute "attributeName" has already been defined
  </code></pre>
  
  <p>By changing one attribute value and it's related code snippet is a one solution that I've tried. But when there are nearly 80 lines like above, it will get a messy. Is there any other way I can solve this issue?</p>