Android gets Ethernet, WiFi IP and MAC addresses

/** * Get local IP * @return */private string getlocalipaddress () {try {String IPv4 = null; list<networkinterface> nilist = collections.list (Networkinterface.getnetworkinterfaces ()); for ( NetworkInterface ni:nilist) {list<inetaddress> ialist = Collections.list (ni.getinetaddresses ()); for ( InetAddress address:ialist) {IPv4 = address.gethostaddress (); if (!address.isloopbackaddress () && Inetaddressutils.isipv4address (IPv4)) {return IPv4;}}} catch (SocketException ex) {}return "0.0.0.0";}

Get MAC address via IP

/** *  get MAC address  *  @return  */@SuppressWarnings ("finally") via local IP private string  GETLOCALMACADDRESSFROMIP ()  {String mac_s =  "";try {byte[] mac; String ip = getlocalipaddress ();if  (! Inetaddressutils.isipv4address (IP))  {return mac_s;} Inetaddress ipaddress = inetaddress.getbyname (IP);if  (ipaddress == null)  { return mac_s;} Networkinterface ne = networkinterface.getbyinetaddress (ipAddress);mac =  Ne.gethardwareaddress ();if  (mac.length > 0)  {mac_s = byte2mac (MAC);}}  catch  (exception e)  {e.printstacktrace ();} finally{return mac_s;}} Private string byte2mac (byte[] b)  {stringbuffer hs = new stringbuffer ( B.length); string stmp =  "";int len = b.length;for  (int n = 0; n  < len; n++) &NBSp {stmp = integer.tohexstring (B[n] & 0xff);if  (Stmp.length ()  == 1)  { Hs = hs.append ("0"). Append (stmp);}  else {hs = hs.append (STMP);}} Stringbuffer str = new stringbuffer (HS);for  (int i = 0; i  < str.length ();  i++)  {if  (i % 3 == 0)  {str.insert (i,  ': ') ;}} Return str.tostring (). substring (1);}

Because it is the MAC address obtained through IP, so when the WiFi connection is the IP gets to the WiFi Mac, if it is Ethernet connection, then get the MAC address of Ethernet

The following approach is to get Ethernet's Mac directly

/** *  get Ethernet's MAC address  *  @return  */private string getmacaddress ()  {try  {return loadfileasstring ("/sys/class/net/eth0/address"). toUpperCase (locale.english). substring (0,  17);}  catch  (Ioexception e)  {return null;}} Private string loadfileasstring (String filepath)  throws java.io.IOException{           StringBuffer fileData = new  StringBuffer (          bufferedreader reader);  = new bufferedreader (New filereader (filePath));            char[] buf = new char[1024]; int numRead=0;            while ((Numread=reader.read (BUF))  != -1) {                string readdata = string.valueof (Buf, 0, numread);                filedata.append (ReadData);            }            reader.close ();            return  filedata.tostring ();       }

There's also an easier way to get Ethernet's Mac

/** * Get Ethernet MAC Address * @return */private String getmacaddress () {Ethernetmanager Ethmanager = (ethernetmanager) mainacti Vity.this.getSystemService ("Ethernet"); return ethmanager.getmacaddr () ==null? ": Ethmanager.getmacaddr ();}

Get the MAC address of WiFi

/** * Get WiFi Mac * @return */private String Getwifimac () {Wifimanager WiFi = (wifimanager) getsystemservice (context.wifi_se Rvice); Wifiinfo info = wifi.getconnectioninfo (); return info.getmacaddress () ==null? ": Info.getmacaddress ();}

Android gets Ethernet, WiFi IP and MAC addresses