[Android] Get this machine IP address

The method is to use the URL: http://pv.sohu.com/cityjson?ie=utf-8, return String Type of ip address: 

public static String getNetIp() {

 String ip = "";

 InputStream inputStream = null;

 try {

 URL infoUrl = new URL("http://pv.sohu.com/cityjson?ie=utf-8"< span style="color: #000000;">);

 URLConnection connection = infoUrl.openConnection();

 HttpURLConnection httpConnection = (HttpURLConnection) connection;

 int responseCode = httpConnection.getResponseCode();

 if (responseCode == HttpURLConnection.HTTP_OK) {

 inputStream = httpConnection.getInputStream();

 BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream , "gb2312"));

 StringBuilder builder = new StringBuilder();

 String line = null;

 while ((line = reader.readLine()) != null ) {

 builder.append(line);

}

 inputStream.close();

 int start1=builder.indexOf(":");

 String str1=builder.substring(start1+1);

 int start2=str1.indexOf("\"");

 String str2=str1.substring(start2+1);

 int start3=str2.indexOf("\"");

 ip=str2.substring(0,start3);

 return ip;

}

} catch (IOException e) {

 e.printStackTrace();

}

 return null;

 }

Note that the method of network connection cannot be used in the main thread

public static String getNetIp() {

 String ip = "";

 InputStream inputStream = null;

 try {

 URL infoUrl = new URL("http://pv.sohu.com/cityjson?ie=utf-8"< span style="color: #000000;">);

 URLConnection connection = infoUrl.openConnection();

 HttpURLConnection httpConnection = (HttpURLConnection) connection;

 int responseCode = httpConnection.getResponseCode();

 if (responseCode == HttpURLConnection.HTTP_OK) {

 inputStream = httpConnection.getInputStream();

 BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream , "gb2312"));

 StringBuilder builder = new StringBuilder();

 String line = null;

 while ((line = reader.readLine()) != null ) {

 builder.append(line);

}

 inputStream.close();

 int start1=builder.indexOf(":");

 String str1=builder.substring(start1+1);

 int start2=str1.indexOf("\"");

 String str2=str1.substring(start2+1);

 int start3=str2.indexOf("\"");

 ip=str2.substring(0,start3);

 return ip;

}

} catch (IOException e) {

 e.printStackTrace();

}

 return null;

 }