How to get IP address of the device from code

Question

Is it possible to get the IP address of the device using some code

User · Answer

Recently  an IP address is still returned by getLocalIpAddress   despite being disconnected from the network  no service indicator   It means the IP address displayed in the Settings  About phone  Status was different from what the application thought   I have implemented a workaround by adding this code before   ConnectivityManager cm   getConnectivityManager    NetworkInfo net   cm getActiveNetworkInfo    if   null    net      net isConnectedOrConnecting          return null      Does that ring a bell to anyone

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in Kotlin  without Formatter  private fun getIPAddress useIPv4   Boolean   String       try           var interfaces   Collections list NetworkInterface getNetworkInterfaces            for  intf in interfaces                var addrs   Collections list intf getInetAddresses                 for  addr in addrs                    if   addr isLoopbackAddress                          var sAddr   addr getHostAddress                        var isIPv4  Boolean                     isIPv4   sAddr indexOf      lt 0                     if  useIPv4                            if  isIPv4                              return sAddr                        else                           if   isIPv4                                var delim   sAddr indexOf         drop ip6 zone suffix                             if  delim  lt  0                                    return sAddr toUpperCase                                                             else                                   return sAddr substring 0  delim  toUpperCase                                                                                                                                 catch  e  java lang Exception          return

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In your activity  the following function getIpAddress context  returns the phone s IP address       public static String getIpAddress Context context        WifiManager wifiManager    WifiManager  context getApplicationContext                    getSystemService WIFI SERVICE        String ipAddress   intToInetAddress wifiManager getDhcpInfo   ipAddress  toString         ipAddress   ipAddress substring 1        return ipAddress     public static InetAddress intToInetAddress int hostAddress        byte   addressBytes      byte  0xff  amp  hostAddress                    byte  0xff  amp   hostAddress  gt  gt  8                     byte  0xff  amp   hostAddress  gt  gt  16                     byte  0xff  amp   hostAddress  gt  gt  24           try           return InetAddress getByAddress addressBytes         catch  UnknownHostException e            throw new AssertionError

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Though there s a correct answer  I share my answer here and hope that this way will more convenience    WifiManager wifiMan    WifiManager  context getSystemService Context WIFI SERVICE   WifiInfo wifiInf   wifiMan getConnectionInfo    int ipAddress   wifiInf getIpAddress    String ip   String format   d  d  d  d    ipAddress  amp  0xff   ipAddress  gt  gt  8  amp  0xff   ipAddress  gt  gt  16  amp  0xff   ipAddress  gt  gt  24  amp  0xff

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I used following code  The reason I used hashCode was because I was getting some garbage values appended to the ip address when I used getHostAddress   But hashCode worked really well for me as then I can use Formatter to get the ip address with correct formatting   Here is the example output    1 using getHostAddress         IP fe80  65ca a13d ea5a 233d rmnet sdio0  2 using hashCode and Formatter          IP 238 194 77 212  As you can see 2nd methods gives me exactly what I need   public String getLocalIpAddress         try           for  Enumeration lt NetworkInterface gt  en   NetworkInterface getNetworkInterfaces    en hasMoreElements                   NetworkInterface intf   en nextElement                for  Enumeration lt InetAddress gt  enumIpAddr   intf getInetAddresses    enumIpAddr hasMoreElements                       InetAddress inetAddress   enumIpAddr nextElement                    if   inetAddress isLoopbackAddress                          String ip   Formatter formatIpAddress inetAddress hashCode                         Log i TAG         IP    ip                       return ip                                                  catch  SocketException ex            Log e TAG  ex toString               return null

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This is a rework of this answer which strips out irrelevant information  adds helpful comments  names variables more clearly  and improves the logic   Don t forget to include the following permissions    lt uses-permission android name  android permission INTERNET    gt   lt uses-permission android name  android permission ACCESS NETWORK STATE    gt    InternetHelper java   public class InternetHelper                   Get IP address from first non-localhost interface                param useIPv4 true return ipv4  false return ipv6         return address or empty string             public static String getIPAddress boolean useIPv4            try               List lt NetworkInterface gt  interfaces                       Collections list NetworkInterface getNetworkInterfaces                  for  NetworkInterface interface    interfaces                     for  InetAddress inetAddress                           Collections list interface  getInetAddresses                               a loopback address would be something like 127 0 0 1  the device                        itself   we want to return the first non-loopback address                         if   inetAddress isLoopbackAddress                              String ipAddr   inetAddress getHostAddress                            boolean isIPv4   ipAddr indexOf       lt  0                           if  isIPv4  amp  amp   useIPv4                                continue                                                    if  useIPv4  amp  amp   isIPv4                                int delim   ipAddr indexOf          drop ip6 zone suffix                             ipAddr   delim  lt  0   ipAddr toUpperCase                                         ipAddr substring 0  delim  toUpperCase                                                      return ipAddr                                                                   catch  Exception ignored         if we can t connect  just return empty string         return                           Get IPv4 address from first non-localhost interface                return address or empty string             public static String getIPAddress             return getIPAddress true

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This is my helper util to read IP and MAC addresses  Implementation is pure-java  but I have a comment block in getMACAddress   which could read the value from the special Linux Android  file  I ve run this code only on few devices and Emulator but let me know here if you find weird results      AndroidManifest xml permissions  lt uses-permission android name  android permission INTERNET    gt   lt uses-permission android name  android permission ACCESS NETWORK STATE    gt      test functions Utils getMACAddress  wlan0    Utils getMACAddress  eth0    Utils getIPAddress true      IPv4 Utils getIPAddress false      IPv6    Utils java  import java io    import java net    import java util         import org apache http conn util InetAddressUtils   public class Utils                   Convert byte array to hex string         param bytes toConvert         return hexValue             public static String bytesToHex byte   bytes            StringBuilder sbuf   new StringBuilder            for int idx 0  idx  lt  bytes length  idx                  int intVal   bytes idx   amp  0xff              if  intVal  lt  0x10  sbuf append  0                sbuf append Integer toHexString intVal  toUpperCase                       return sbuf toString                          Get utf8 byte array          param str which to be converted         return  array of NULL if error was found             public static byte   getUTF8Bytes String str            try   return str getBytes  UTF-8      catch  Exception ex    return null                          Load UTF8withBOM or any ansi text file          param filename which to be converted to string         return String value of File         throws java io IOException if error occurs             public static String loadFileAsString String filename  throws java io IOException           final int BUFLEN 1024          BufferedInputStream is   new BufferedInputStream new FileInputStream filename   BUFLEN           try               ByteArrayOutputStream baos   new ByteArrayOutputStream BUFLEN               byte   bytes   new byte BUFLEN               boolean isUTF8 false              int read count 0                         while  read is read bytes      -1                    if  count  0  amp  amp  bytes 0    byte 0xEF  amp  amp  bytes 1    byte 0xBB  amp  amp  bytes 2    byte 0xBF                         isUTF8 true                      baos write bytes  3  read-3      drop UTF8 bom marker                   else                       baos write bytes  0  read                                     count  read                            return isUTF8   new String baos toByteArray     UTF-8     new String baos toByteArray               finally               try  is close      catch Exception ignored                                     Returns MAC address of the given interface name          param interfaceName eth0  wlan0 or NULL use first interface          return  mac address or empty string             public static String getMACAddress String interfaceName            try               List lt NetworkInterface gt  interfaces   Collections list NetworkInterface getNetworkInterfaces                 for  NetworkInterface intf   interfaces                    if  interfaceName    null                        if   intf getName   equalsIgnoreCase interfaceName   continue                                    byte   mac   intf getHardwareAddress                    if  mac  null  return                     StringBuilder buf   new StringBuilder                    for  byte aMac   mac  buf append String format   02X   aMac                      if  buf length   gt 0  buf deleteCharAt buf length  -1                   return buf toString                            catch  Exception ignored         for now eat exceptions         return               try                  this is so Linux hack             return loadFileAsString   sys class net    interfaceName     address   toUpperCase   trim              catch  IOException ex                return null                                    Get IP address from first non-localhost interface         param useIPv4   true return ipv4  false return ipv6         return  address or empty string             public static String getIPAddress boolean useIPv4            try               List lt NetworkInterface gt  interfaces   Collections list NetworkInterface getNetworkInterfaces                 for  NetworkInterface intf   interfaces                    List lt InetAddress gt  addrs   Collections list intf getInetAddresses                     for  InetAddress addr   addrs                        if   addr isLoopbackAddress                              String sAddr   addr getHostAddress                              boolean isIPv4   InetAddressUtils isIPv4Address sAddr                           boolean isIPv4   sAddr indexOf      lt 0                           if  useIPv4                                if  isIPv4                                   return sAddr                            else                               if   isIPv4                                    int delim   sAddr indexOf          drop ip6 zone suffix                                 return delim lt 0   sAddr toUpperCase     sAddr substring 0  delim  toUpperCase                                                                                                                            catch  Exception ignored         for now eat exceptions         return                   Disclaimer  Ideas and example code to this Utils class came from   several SO posts and Google  I have cleaned and merged all examples

User · Answer

NonNull     public static String getIPAddress             if  TextUtils isEmpty deviceIpAddress               new PublicIPAddress   execute            return deviceIpAddress             public static String deviceIpAddress            public static class PublicIPAddress extends AsyncTask lt String  Void  String gt            InetAddress localhost   null           protected String doInBackground String    urls                try                   localhost   InetAddress getLocalHost                    URL url name   new URL  http   bot whatismyipaddress com                    BufferedReader sc   new BufferedReader new InputStreamReader url name openStream                      deviceIpAddress   sc readLine   trim                  catch  Exception e                    deviceIpAddress                                 return deviceIpAddress                     protected void onPostExecute String string                Lg d  deviceIpAddress   string

User · Answer

You can do this  String stringUrl    https   ipinfo io ip     String stringUrl    http   whatismyip akamai com       Instantiate the RequestQueue  RequestQueue queue   Volley newRequestQueue MainActivity instance     String url   http   www google com       Request a string response from the provided URL  StringRequest stringRequest   new StringRequest Request Method GET  stringUrl          new Response Listener lt String gt                   Override             public void onResponse String response                       Display the first 500 characters of the response string                  Log e MGLogTag   GET IP       response                             new Response ErrorListener          Override     public void onErrorResponse VolleyError error            IP    That didn t work                  Add the request to the RequestQueue  queue add stringRequest

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Simply use Volley to get the ip from this site  RequestQueue queue   Volley newRequestQueue this       String urlip    http   checkip amazonaws com         StringRequest stringRequest   new StringRequest Request Method GET  urlip  new Response Listener lt String gt               Override         public void onResponse String response                txtIP setText response                     new Response ErrorListener              Override         public void onErrorResponse VolleyError error                txtIP setText  didnt work                           queue add stringRequest

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This worked for me   WifiManager wm    WifiManager  getSystemService WIFI SERVICE   String ip   Formatter formatIpAddress wm getConnectionInfo   getIpAddress

User · Answer

Based on what I have tested this is my proposal  import java net    import java util     public class hostUtil      public static String HOST NAME   null     public static String HOST IPADDRESS   null      public static String getThisHostName               if  HOST NAME    null  obtainHostInfo           return HOST NAME           public static String getThisIpAddress               if  HOST IPADDRESS    null  obtainHostInfo           return HOST IPADDRESS           protected static void obtainHostInfo               HOST IPADDRESS    127 0 0 1         HOST NAME    localhost          try                  InetAddress primera   InetAddress getLocalHost             String hostname   InetAddress getLocalHost   getHostName               if   primera isLoopbackAddress     amp  amp                hostname equalsIgnoreCase   localhost    amp  amp                primera getHostAddress    indexOf          -1                            Got it without delay               HOST IPADDRESS   primera getHostAddress                 HOST NAME   hostname                System out println   First try      HOST NAME     IP     HOST IPADDRESS               return                      for  Enumeration lt NetworkInterface gt  netArr   NetworkInterface getNetworkInterfaces    netArr hasMoreElements                            NetworkInterface netInte   netArr nextElement                 for  Enumeration lt InetAddress gt  addArr   netInte getInetAddresses     addArr hasMoreElements                                   InetAddress laAdd   addArr nextElement                    String ipstring   laAdd getHostAddress                    String hostName   laAdd getHostName                     if  laAdd isLoopbackAddress    continue                 if  hostName equalsIgnoreCase   localhost    continue                 if  ipstring indexOf        gt   0  continue                  HOST IPADDRESS   ipstring                 HOST NAME   hostName                 break                                   catch  Exception ex

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If you have a shell   ifconfig eth0 worked for x86 device too

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A device might have several IP addresses  and the one in use in a particular app might not be the IP that servers receiving the request will see  Indeed  some users use a VPN or a proxy such as Cloudflare Warp    If your purpose is to get the IP address as shown by servers that receive requests from your device  then the best is to query an IP geolocation service such as Ipregistry  disclaimer  I work for the company  with its Java client   https   github com ipregistry ipregistry-java  IpregistryClient client   new IpregistryClient  tryout    RequesterIpInfo requesterIpInfo   client lookup    requesterIpInfo getIp      In addition to being really simple to use  you get additional information such as country  language  currency  the time zone for the device IP and you can identify whether the user is using a proxy

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kotlin minimalist version  fun getIpv4HostAddress    String       NetworkInterface getNetworkInterfaces    toList    map   networkInterface - gt          networkInterface inetAddresses  toList    find                it isLoopbackAddress  amp  amp  it is Inet4Address            let   return it hostAddress             return

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Compiling some of the ideas to get the wifi ip from the WifiManager in a nicer kotlin solution   private fun getWifiIp context  Context   String      return context getSystemService lt WifiManager gt    let        when         it    null - gt   No wifi available         it isWifiEnabled - gt   Wifi is disabled        it connectionInfo    null - gt   Wifi not connected        else - gt            val ip   it connectionInfo ipAddress           ip and 0xFF  toString            ip shr 8 and 0xFF           ip shr 16 and 0xFF           ip shr 24 and 0xFF                         Alternatively you can get the ip adresses of ip4 loopback devices via the NetworkInterface   fun getNetworkIp4LoopbackIps    Map lt String  String gt    try     NetworkInterface getNetworkInterfaces        asSequence        associate   it displayName to it ip4LoopbackIps          filterValues   it isNotEmpty       catch  ex  Exception      emptyMap      private fun NetworkInterface ip4LoopbackIps       inetAddresses asSequence        filter    it isLoopbackAddress  amp  amp  it is Inet4Address        map   it hostAddress        filter   it isNotEmpty          joinToString

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WifiManager wm    WifiManager  getSystemService WIFI SERVICE   String ipAddress   BigInteger valueOf wm getDhcpInfo   netmask  toString

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I don t do Android  but I d tackle this in a totally different way   Send a query to Google  something like  https   www google com webhp sourceid chrome-instant amp ion 1 amp espv 2 amp ie UTF-8 q my 20ip  And refer to the HTML field where the response is posted  You may also query directly to the source   Google will most like be there for longer than your Application   Just remember  it could be that your user does not have internet at this time  what would you like to happen    Good Luck

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Below code might help you   Don t forget to add permissions     public String getLocalIpAddress       try          for  Enumeration lt NetworkInterface gt  en   NetworkInterface getNetworkInterfaces             en hasMoreElements              NetworkInterface intf   en nextElement               for  Enumeration lt InetAddress gt  enumIpAddr   intf getInetAddresses    enumIpAddr hasMoreElements                  InetAddress inetAddress   enumIpAddr nextElement                    if   inetAddress isLoopbackAddress                      return inetAddress getHostAddress                                                     catch  Exception ex              Log e  IP Address   ex toString                   return null      Add below permission in the manifest file     lt uses-permission android name  android permission INTERNET    gt    lt uses-permission android name  android permission ACCESS NETWORK STATE    gt    happy coding

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public static String getLocalIpAddress         try           for  Enumeration lt NetworkInterface gt  en   NetworkInterface getNetworkInterfaces    en hasMoreElements                   NetworkInterface intf   en nextElement                for  Enumeration lt InetAddress gt  enumIpAddr   intf getInetAddresses    enumIpAddr hasMoreElements                       InetAddress inetAddress   enumIpAddr nextElement                    if   inetAddress isLoopbackAddress    amp  amp  inetAddress instanceof Inet4Address                        return inetAddress getHostAddress                                                    catch  SocketException ex            ex printStackTrace              return null      I ve added inetAddress instanceof Inet4Address to check if it is a ipv4 address

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In all honesty I am only a little familiar with code safety  so this may be hack-ish  But for me this is the most versatile way to do it   package com my objects ip   import java net InetAddress  import java net UnknownHostException   public class MyIpByHost      public static void main String a           try              InetAddress host   InetAddress getByName  nameOfDevice or webAddress          System out println host getHostAddress               catch  UnknownHostException e               e printStackTrace

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Please check this code   Using this code  we will get ip from mobile internet     for  Enumeration lt NetworkInterface gt  en   NetworkInterface getNetworkInterfaces    en hasMoreElements                        NetworkInterface intf   en nextElement                    for  Enumeration lt InetAddress gt  enumIpAddr   intf getInetAddresses    enumIpAddr hasMoreElements                            InetAddress inetAddress   enumIpAddr nextElement                        if   inetAddress isLoopbackAddress                              return inetAddress getHostAddress   toString

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Method getDeviceIpAddress returns device s ip address and prefers wifi interface address if it connected      NonNull     private String getDeviceIpAddress             String actualConnectedToNetwork   null          ConnectivityManager connManager    ConnectivityManager  getSystemService Context CONNECTIVITY SERVICE           if  connManager    null                NetworkInfo mWifi   connManager getNetworkInfo ConnectivityManager TYPE WIFI               if  mWifi isConnected                      actualConnectedToNetwork   getWifiIp                                    if  TextUtils isEmpty actualConnectedToNetwork                 actualConnectedToNetwork   getNetworkInterfaceIpAddress                      if  TextUtils isEmpty actualConnectedToNetwork                 actualConnectedToNetwork    127 0 0 1                     return actualConnectedToNetwork              Nullable     private String getWifiIp             final WifiManager mWifiManager    WifiManager  getApplicationContext   getSystemService Context WIFI SERVICE           if  mWifiManager    null  amp  amp  mWifiManager isWifiEnabled                  int ip   mWifiManager getConnectionInfo   getIpAddress                return  ip  amp  0xFF            ip  gt  gt  8   amp  0xFF            ip  gt  gt  16   amp  0xFF                                ip  gt  gt  24   amp  0xFF                     return null               Nullable     public String getNetworkInterfaceIpAddress             try               for  Enumeration lt NetworkInterface gt  en   NetworkInterface getNetworkInterfaces    en hasMoreElements                        NetworkInterface networkInterface   en nextElement                    for  Enumeration lt InetAddress gt  enumIpAddr   networkInterface getInetAddresses    enumIpAddr hasMoreElements                            InetAddress inetAddress   enumIpAddr nextElement                        if   inetAddress isLoopbackAddress    amp  amp  inetAddress instanceof Inet4Address                            String host   inetAddress getHostAddress                            if   TextUtils isEmpty host                                 return host                                                                                             catch  Exception ex                Log e  IP Address    getLocalIpAddress   ex                     return null

User · Answer

You do not need to add permissions like what is the case with the solutions provided so far  Download this website as a string    http   www ip-api com json  or   http   www telize com geoip  Downloading a website as a string can be done with java code   http   www itcuties com java read-url-to-string   Parse the JSON object like this   https   stackoverflow com a 18998203 1987258  The json attribute  query  or  ip  contains the IP address

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Here is kotlin version of  Nilesh and  anargund    fun getIpAddress    String       var ip          try           val wm   applicationContext getSystemService WIFI SERVICE  as WifiManager         ip   Formatter formatIpAddress wm connectionInfo ipAddress        catch  e  java lang Exception                if  ip isEmpty              try               val en   NetworkInterface getNetworkInterfaces               while  en hasMoreElements                      val networkInterface   en nextElement                   val enumIpAddr   networkInterface inetAddresses                 while  enumIpAddr hasMoreElements                          val inetAddress   enumIpAddr nextElement                       if   inetAddress isLoopbackAddress  amp  amp  inetAddress is Inet4Address                            val host   inetAddress getHostAddress                           if  host isNotEmpty                                  ip    host                             break                                                                                             catch  e  java lang Exception                         if  ip isEmpty          ip    127 0 0 1      return ip

User · Answer

This is the easiest and simple way ever exist on the internet    First of all  add this permission to your manifest file       INTERNET    ACCESS NETWORK STATE     add this in onCreate file of Activity         getPublicIP       Now Add this function to your MainActivity class    x000D   x000D      private void getPublicIP     x000D  ArrayList lt String gt  urls new ArrayList lt String gt       to read each line x000D   x000D          new Thread new Runnable    x000D              public void run    x000D                    TextView t    to show the result  please declare and find it inside onCreate   x000D   x000D                  try   x000D                         Create a URL for the desired page x000D                      URL url   new URL  https   api ipify org       My text file location x000D                        First open the connection x000D                      HttpURLConnection conn  HttpURLConnection  url openConnection    x000D                      conn setConnectTimeout 60000      timing out in a minute x000D   x000D                      BufferedReader in   new BufferedReader new InputStreamReader conn getInputStream      x000D   x000D                        t  TextView findViewById R id TextView1      ideally do this in onCreate   x000D                      String str  x000D                      while   str   in readLine       null    x000D                          urls add str   x000D                        x000D                      in close    x000D                    catch  Exception e    x000D                      Log d  MyTag  e toString     x000D                    x000D   x000D                    since we are in background thread  to post results we have to go back to ui thread  do the following for that x000D   x000D                  PermissionsActivity this runOnUiThread new Runnable    x000D                      public void run    x000D                          try   x000D                              Toast makeText PermissionsActivity this   Public IP   urls get 0   Toast LENGTH SHORT  show    x000D                            x000D                          catch  Exception e   x000D                              Toast makeText PermissionsActivity this   TurnOn wiffi to get public ip   Toast LENGTH SHORT  show    x000D                            x000D                        x000D                      x000D   x000D                x000D             start    x000D   x000D        x000D   x000D   x000D

User · Answer

private InetAddress getLocalAddress  throws IOException                try                   for  Enumeration lt NetworkInterface gt  en   NetworkInterface getNetworkInterfaces    en hasMoreElements                           NetworkInterface intf   en nextElement                        for  Enumeration lt InetAddress gt  enumIpAddr   intf getInetAddresses    enumIpAddr hasMoreElements                               InetAddress inetAddress   enumIpAddr nextElement                            if   inetAddress isLoopbackAddress                                    return inetAddress getHostAddress   toString                                return inetAddress                                                                                  catch  SocketException ex                    Log e  SALMAN   ex toString                               return null

[android] How to get IP address of the device from code?

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