title: How could i change CONTENT-TYPE of WebView#PostUrl()?
body: <p>in Android WebView.</p>
  
  <p>i'm trying to Use WebView#postUrl() with postData.
  but i couldn't find the way of changing the Content-Type of request. it's always <strong>"application/x-www-form-urlencoded".</strong></p>
  
  <p>How can I change that?</p>
  
  <pre><code>    StringBuilder sb = new StringBuilder();
      sb.append("&lt;?xml version=\"1.0\" encoding=\"UTF-8\"?&gt;\r\n");
      sb.append("&lt;resource&gt;\r\n");
      sb.append("&lt;element a=\"a\" b=\"b\"/&gt;\r\n"); 
      sb.append("&lt;/resource&gt;");
      String postData = sb.toString();
  
      mWebView.postUrl(url, postData.getBytes());
  </code></pre>
  
  <p>Thank you!</p>