Android 擷取外網IP，實測有效

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網上有很多擷取IP的例子，不過都是擷取到的本地ip，還有的是因為走不通了，擷取到的ip為空白，下面看實測擷取到外網IP的代碼，注意需要線上程裡面執行

 

/**     * 擷取外網的IP(要訪問Url，要放到後台線程裡處理)     *     * @param @return     * @return String     * @throws     * @Title: GetNetIp     * @Description:     */    public static String getNetIp() {        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);        return ipLine;    }

 

Android 擷取外網IP，實測有效