thread.join 从异步执行变成同步

public static String getAddress (final InputStream inputStream, final String mobile) {
            Thread thread = new Thread() {
                   public void run() {
                         try {
                              Log. i(TAG, "inputStream: " + inputStream.available());
                              String soap = readSoapFile(inputStream, mobile);
                               byte[] data = soap.getBytes();

                              URL url = new URL(
                                           "http://webservice.webxml.com.cn/WebServices/MobileCodeWS.asmx" );
                              HttpURLConnection conn = (HttpURLConnection) url
                                          .openConnection();
                              conn.setDoOutput( true);
                              conn.setConnectTimeout(5 * 1000);
                              conn.setRequestMethod( "POST");
                              conn.setRequestProperty( "Content-Type",
                                           "application/soap+xml; charset=utf-8");
                              conn.setRequestProperty( "Content-Length",
                                          String. valueOf(data.length)); 

                              OutputStream outputStream = conn.getOutputStream();
                              outputStream.write(data);
                              outputStream.flush();
                              outputStream.close();
                              
                               if (conn.getResponseCode() == 200) {
                                     address =parseResponseXML(conn
                                                .getInputStream()); 
                              }
                        } catch (Exception e) {
                        }
                  };
            };
            thread.start();
             try { thread.join(); } catch (Exception e) {}
             if(address !=null){
                   return address ;
            }
             return null ;
      }