title: Cannot use the PhoneGap barcode scanner plugin in Android
body: <p>I followed the <a href="http://www.mobiledevelopersolutions.com/home/start/twominutetutorials/tmt3" rel="nofollow">tutorial here</a> to install the phonegap plugin in my Android project.</p>
  
  <p>The version of Cordova (PhoneGap) is 2.3.0, and I download the plugin from <a href="https://github.com/phonegap/phonegap-plugins" rel="nofollow">this github link</a>;</p>
  
  <p>Here is my code where I try to call the barcode scanner:</p>
  
  <pre><code>  window.plugins.barcodeScanner.scan(success,
       function(error) {
          alert("scanning failed: " + error)
       }
    );
  </code></pre>
  
  <p>When I press the button to call the method, I get the following error:</p>
  
  <pre><code>scanning failed : Class not found.
  </code></pre>
  
  <p>What am I doing wrong?</p>