ViewState MAC에 대한 유효성 검사 실패

nameValuePairs.add(new BasicNameValuePair("__VIEWSTATE", __VIEWSTATE)); http://stackoverflow.com/questions/12316329/got-validation-of-viewstate-mac-failed-when-sending-post-request-from-google-app?rq=1 http://www.answerques.com/si1zeexWgPUS/downloading-excel-file-from-aspx-page android machinekey viewstate...