Android从网络下载XML输出流或者字符串（知识积累）

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public String downloadXML(final String urlStr)

    {

        StringBuffer sb=new StringBuffer();

        String line=null;

        BufferedReader buffer=null;

         

        try {

            URL url=new URL(urlStr);

             

            HttpURLConnection urlConn=(HttpURLConnection)url.openConnection();

             

            InputStream inputStream = urlConn.getInputStream();

             

            buffer=new BufferedReader(new InputStreamReader(inputStream));

             

            while ((line= buffer.readLine()) != null) {

                sb.append(line);

                 

            }

 

        } catch (Exception e) {

            e.printStackTrace();

        } finally{

            try {

                buffer.close();

            } catch (Exception e2) {

                e2.printStackTrace();

            }

        }

         

         

        return sb.toString();

    }