java.net.unknownhostexception: host is unresolved

场景：java.net.UnknownHostException: Host is unresolved错误

java.net.UnknownHostException: Host is unresolved异常

Java code


public void createXmlResource(String city, OutputStream out) {
                BufferedReader br;
                try {
                        URL url = new URL("http://www.google.com/ig/api?weather=北京");
                        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                        conn.setDoInput(true);
                        conn.connect();
                        br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                        OutputStreamWriter file_writer = new OutputStreamWriter(out);
                        String str = null;
                        while ((str = br.readLine()) != null) {
                                file_writer.write(str);
                        }
                        br.close();
                        file_writer.close();
                } catch (Exception e) {
                        e.printStackTrace();
                }
        }

结果conn.connect();这一句抛出了
java.net.UnknownHostException: Host is unresolved： www.google.com:80
在AndroidManifest.xml中我也写了<uses-permission android:name="android.permission.INTERNET" />
希望知道的同学告诉我真相啊

------解决方案--------------------
还是网络问题，你模拟器还是真机，先用下系统的浏览器，看能打开google不，然后测试你的程序。感觉网络不通
------解决方案--------------------
楼主把URL地址改为：http://www.google.com.hk/ig/api?weather=北京
试试，因为现在谷歌在中国的域名是www.google.com.hk
------解决方案--------------------
不能用中文，必须用城市的英文名称(即拼音)
http://www.google.com/ig/api?weather=beijing
http://www.google.com.hk/ig/api?weather=beijing
两个都行。

要想在模拟器上或真机上显示简体中文，需要用
http://www.google.com/ig/api?hl=zh-cn&weather=Beijing
并把解析得到的数据重新设置utf-8编码

java.net.unknownhostexception: host is unresolved

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