title: Grid Layout & API Level
body: <p>I want to use Grid Layout, but get the following error:</p>
  
  <blockquote>
    <p>Error: No resource identifier found for attribute 'columnCount' in package 'android'</p>
  </blockquote>
  
  <p>Is this because my API level is <strong>9</strong>? </p>
  
  <p>Does Grid Layout REALLY need API level <strong>14</strong>?
  (I use Version: 8.0.1.v201012062107-82219)</p>
  
  <ul>
  <li>If yes, what should I do? Please explain this step by step.</li>
  <li>If no, so what's the reason? I'm doing <em>exactly</em> the same as the example!</li>
  </ul>