主機名時,在我的Android應用程序,我必須從一個URL(http://api.offersdb.com/distribution/beta/offers.json?api_key=demo&radius=10&postal_code=30305
)獲得XML數據,我使用下面的代碼獲取的java.net.UnknownHostException,使用android系統中
try {
URL url = new URL(urlStr);
URLConnection urlConn = url.openConnection();
if (!(urlConn instanceof HttpURLConnection)) {
throw new IOException("URL is not an Http URL");
}
HttpURLConnection httpConn = (HttpURLConnection) urlConn;
httpConn.setAllowUserInteraction(false);
httpConn.setInstanceFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.connect();
resCode = httpConn.getResponseCode();
if (resCode == HttpURLConnection.HTTP_OK) {
inputStream = httpConn.getInputStream();
}
}catch (Exception e) {
e.printStackTrace();
}
但它返回以下異常
java.net.UnknownHostException: Host is unresolved: api.offersdb.com:80
當我在URL中的ip地址(XX.XX.XXX.XX)更改主機名(api.offersdb.com),我能得到響應。我不知道爲什麼我得到這個問題,請有人幫助我。
由於事先
Rajapandian
感謝您的答覆。我嘗試在我的設備瀏覽器中,沒有數據傳出。請你能幫我解決這個問題嗎? – Rajapandian 2011-04-21 07:27:10
您可以在android.stackexchange.com中尋求幫助,因爲這是一般的設備設置。基本上,無線局域網或移動網絡提供商不會向您發送正確的DNS服務器ips。 – 2011-04-21 07:36:29