/** Returns the charset specified in the Content-Type of this header. */
 public static String getCharset(KJHttpResponse response) {
   Map<String, String> header = response.getHeaders();
   if (header != null) {
     String contentType = header.get("Content-Type");
     if (!TextUtils.isEmpty(contentType)) {
       String[] params = contentType.split(";");
       for (int i = 1; i < params.length; i++) {
         String[] pair = params[i].trim().split("=");
         if (pair.length == 2) {
           if (pair[0].equals("charset")) {
             return pair[1];
           }
         }
       }
     }
   }
   return null;
 }
 public static String getHeader(KJHttpResponse response, String key) {
   return response.getHeaders().get(key);
 }