title: how to deal with the resolution in the phonegap
body: <p>I'm using phonegap to develop a small demo which will run on the Android device. And the resolution of my device is 1280*720, so I create a canvas which is 1280*720 to fill the whole screen and draw a picture with the same size.But I find it's too big to show in my advice, I must adjust this to 640*360. But it is very blurred.How can I fix it?</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;head&gt;
      &lt;title&gt;&lt;/title&gt;
      &lt;script src="js/jquery.min.js" type="text/javascript"&gt;&lt;/script&gt;
      &lt;script src="js/demo.js" type="text/javascript"&gt;&lt;/script&gt;
      &lt;style&gt;
          body {
              margin:0 !important;
          }
      &lt;/style&gt;
  &lt;/head&gt;
  &lt;body&gt;
      &lt;canvas id="canvas" width="360" height="640"&gt;&lt;/canvas&gt;
      &lt;script&gt;
          $(document).ready(function(){
              prepareCanvas();
          });
      &lt;/script&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>