解析上载上来的xml文件 解析不出来。

/** *下载 xml 文件**/StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()            .detectDiskReads()            .detectDiskWrites()            .detectNetwork()   // or .detectAll() for all detectable problems            .penaltyLog()            .build());            StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()            .detectLeakedSqlLiteObjects()            .detectLeakedClosableObjects()            .penaltyLog()            .penaltyDeath()            .build());            //访问互联网代码结束     --------               downloadpath = "http://www.kskjkf.com/version/update/"+1+".xml";             //建立下载文件的保存路径            String dirName= Environment.getExternalStorageDirectory()+"/update/";            System.out.println("下载文件的保存路径"+dirName);            File file = new File(dirName);            if(!file.exists()){                file.mkdir();            }            //准备拼接新的文件名            newFileName = downloadpath.substring(downloadpath.lastIndexOf("/")+1, downloadpath.length());            //System.out.println("截取路径得到的名字是："+newFileName);            //newFileName = "update.xml";            newFileName = dirName+newFileName;            System.out.println("新文件名字是："+newFileName);            File f = new File(newFileName);            if(f.exists()){                System.out.println("如果存在就删除");                f.delete();             }            try {                URL url = new URL(downloadpath);                URLConnection conn = url.openConnection();                System.out.println("连接文件路径"+url);                int contentLength = conn.getContentLength();                System.out.println("文件长度===="+contentLength);                InputStream is = conn.getInputStream();                byte[] bs = new byte[1024];                int len;                OutputStream os = new FileOutputStream(newFileName);                System.out.println("OS的长度"+os.toString());                while((len=is.read())!=-1){                    os.write(bs,0, len);                                    }                System.out.println("下载完毕。。。。。");                Toast.makeText(UpdateActivity.this, "下载成功", Toast.LENGTH_LONG).show();                                os.close();                is.close();                new Thread(new ResolveUpdateXml()).start();            } catch (Exception e) {                e.printStackTrace();            }            //new Thread(new ResolveUpdateXml()).start();        }

07-02 09:25:16.843: W/System.err(5366): java.io.IOException: Couldn't open ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????07-02 09:25:17.054: W/System.err(5366): Caused by: java.net.MalformedURLException: Protocol not found: