如果向获取Android使用的公网IP 可以通过pv.sohu来获取公网IP ，方法比较稳定；
public StringgetPublicIp() {
URL infoUrl =null;
InputStream inStream =null;
String ipLine ="";
HttpURLConnection httpConnection =null;
try {
// infoUrl = new URL("http://ip168.com/");
infoUrl =new URL("http://pv.sohu.com/cityjson?ie=utf-8");
URLConnection connection = infoUrl.openConnection();
httpConnection = (HttpURLConnection) connection;
int responseCode = httpConnection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
inStream = httpConnection.getInputStream();
BufferedReader reader =new BufferedReader(
new InputStreamReader(inStream, "utf-8"));
StringBuilder strber =new StringBuilder();
String line =null;
while ((line = reader.readLine()) !=null){
strber.append(line +"\n");
}
Pattern pattern = Pattern
.compile("((?:(?:25[0-5]|2[0-4]\\d|((1\\d{2})|([1-9]?\\d)))\\.){3}(?:25[0-5]|2[0-4]\\d|((1\\d{2})|([1-9]?\\d))))");
Matcher matcher = pattern.matcher(strber.toString());
if (matcher.find()) {
ipLine = matcher.group();
}
}
}catch (MalformedURLException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}finally {
try {
inStream.close();
httpConnection.disconnect();
}catch (IOException e) {
e.printStackTrace();
}catch (Exception ex) {
ex.printStackTrace();
}
}
// Log.e("getNetIp", ipLine);
// System.out.println(ipLine);
return ipLine;
}