Programmatically getting the MAC of an Android device

Question

I need to obtain the MAC address of my android device using Java  I ve searched online  but I haven t found anything useful

User · Answer

You can get mac address   WifiManager wifiManager    WifiManager  getSystemService Context WIFI SERVICE   WifiInfo wInfo   wifiManager getConnectionInfo    String mac   wInfo getMacAddress      Set Permission in Menifest xml   lt uses-permission android name  android permission ACCESS WIFI STATE  gt  lt  uses-permission gt

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Using this simple method      WifiManager wm    WifiManager  getApplicationContext   getSystemService Context WIFI SERVICE               String WLANMAC   wm getConnectionInfo   getMacAddress

User · Answer

Its Working with Marshmallow  package com keshav fetchmacaddress   import android support v7 app AppCompatActivity  import android os Bundle  import android util Log   import java net InetAddress  import java net NetworkInterface  import java net SocketException  import java net UnknownHostException  import java util Collections  import java util List   public class MainActivity extends AppCompatActivity         Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main            Log e  keshav   getMacAddr - gt     getMacAddr                public static String getMacAddr             try               List lt NetworkInterface gt  all   Collections list NetworkInterface getNetworkInterfaces                 for  NetworkInterface nif   all                    if   nif getName   equalsIgnoreCase  wlan0    continue                   byte   macBytes   nif getHardwareAddress                    if  macBytes    null                        return                                        StringBuilder res1   new StringBuilder                    for  byte b   macBytes                        res1 append Integer toHexString b  amp  0xFF                                             if  res1 length    gt  0                        res1 deleteCharAt res1 length   - 1                                     return res1 toString                            catch  Exception ex                  handle exception                   return

User · Answer

public static String getMacAddr         try           List lt NetworkInterface gt  all   Collections list NetworkInterface getNetworkInterfaces             for  NetworkInterface nif   all                if   nif getName   equalsIgnoreCase  wlan0    continue               byte   macBytes   nif getHardwareAddress                if  macBytes    null                    return                                StringBuilder res1   new StringBuilder                for  byte b   macBytes                    res1 append String format   02X   b                               if  res1 length    gt  0                    res1 deleteCharAt res1 length   - 1                             return res1 toString                    catch  Exception ex              return  02 00 00 00 00 00

User · Answer

I know this is a very old question but there is one more method to do this  Below code compiles but I haven t tried it  You can write some C code and use JNI  Java Native Interface  to get MAC address  Here is the example main activity code  package com example getmymac   import android os Bundle  import android util Log  import android widget TextView   import androidx appcompat app AppCompatActivity   public class GetMyMacActivity extends AppCompatActivity       static      here we are importing native library             name of the library is libnet-utils so  in cmake and java code            we just use name  quot net-utils quot           System loadLibrary  quot net-utils quot               protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout main screen               some debug text and a TextView          Log d NetUtilsActivity class getSimpleName     quot Starting app    quot            TextView text   findViewById R id sample text               the get mac addr native function  implemented in C code          byte   macArr   get mac addr null              since it is a byte array  we format it and convert to string          String val   String format  quot  02x  02x  02x  02x  02x  02x quot                   macArr 0   macArr 1   macArr 2                   macArr 3   macArr 4   macArr 5               print it to log and TextView          Log d NetUtilsActivity class getSimpleName    val           text setText val                 here is the prototype of the native function         use native keyword to indicate it is a native function         implemented in C code      private native byte   get mac addr String interface name      And the layout file  main screen xml   lt  xml version  quot 1 0 quot  encoding  quot utf-8 quot   gt   lt androidx constraintlayout widget ConstraintLayout xmlns android  quot http   schemas android com apk res android quot      xmlns app  quot http   schemas android com apk res-auto quot      android layout width  quot match parent quot      android layout height  quot match parent quot  gt        lt TextView         android id  quot   id sample text quot          android layout width  quot wrap content quot          android layout height  quot wrap content quot          android text  quot  string app name quot          app layout constraintBottom toBottomOf  quot parent quot          app layout constraintRight toRightOf  quot parent quot          app layout constraintLeft toLeftOf  quot parent quot          app layout constraintTop toTopOf  quot parent quot   gt    lt  androidx constraintlayout widget ConstraintLayout gt   Manifest file  I didn t know what permissions to add so I added some   lt manifest xmlns android  quot http   schemas android com apk res android quot      package  quot com example getmymac quot  gt        lt uses-permission android name  quot android permission ACCESS FINE LOCATION quot   gt       lt uses-permission android name  quot android permission INTERNET quot   gt        lt application         android allowBackup  quot true quot          android icon  quot  mipmap ic launcher quot          android label  quot  string app name quot          android roundIcon  quot  mipmap ic launcher round quot          android supportsRtl  quot true quot          android theme  quot  style AppTheme quot  gt            lt activity android name  quot  GetMyMacActivity quot  gt               lt intent-filter gt                   lt action android name  quot android intent action MAIN quot   gt                   lt category android name  quot android intent category LAUNCHER quot   gt               lt  intent-filter gt           lt  activity gt       lt  application gt   lt  manifest gt   C implementation of get mac addr function     length of array that MAC address is stored      define MAC ARR LEN 6   define BUF SIZE 256   include  lt jni h gt   include  lt stdio h gt   include  lt stdlib h gt   include  lt string h gt   include  lt netinet in h gt   include  lt arpa inet h gt   include  lt sys socket h gt   include  lt sys types h gt   include  lt net if h gt   include  lt sys ioctl h gt   include  lt unistd h gt    define ERROR IOCTL 1  define ERROR SOCKT 2  static jboolean cstr eq jstr JNIEnv  env  const char  cstr  jstring jstr           see  this  https   stackoverflow com a 38204842          jstring cstr as jstr     env - gt NewStringUTF env  cstr       jclass cls     env - gt GetObjectClass env  jstr       jmethodID method id     env - gt GetMethodID env  cls   quot equals quot    quot  Ljava lang Object  Z quot        jboolean equal     env - gt CallBooleanMethod env  jstr  method id  cstr as jstr       return equal     static void get mac by ifname jchar  ifname  JNIEnv  env  jbyteArray arr  int  error           see  this  https   stackoverflow com a 1779758          struct ifreq ir      struct ifconf ic      char buf BUF SIZE       int ret   0  sock   socket AF INET  SOCK DGRAM  IPPROTO IP        if  sock    -1             error   ERROR SOCKT          return             ic ifc len   BUF SIZE      ic ifc buf   buf       ret   ioctl sock  SIOCGIFCONF   amp ic       if  ret             error   ERROR IOCTL          goto err cleanup             struct ifreq  it   ic ifc req     iterator        struct ifreq  end   it    ic ifc len   sizeof struct ifreq         int found   0     found interface named  ifname             while we find an interface named  ifname  or arrive end        while  it  lt  end  amp  amp  found    0            strcpy ir ifr name  it- gt ifr name           ret   ioctl sock  SIOCGIFFLAGS   amp ir           if  ret    0                if    ir ifr flags  amp  IFF LOOPBACK                     ret   ioctl sock  SIOCGIFHWADDR   amp ir                   if  ret                         error   ERROR IOCTL                      goto err cleanup                                     if  ifname    NULL                        if  cstr eq jstr env  ir ifr name  ifname                             found   1                                                                  else                error   ERROR IOCTL              goto err cleanup                      it                copy the MAC address to byte array          env - gt SetByteArrayRegion env  arr  0  6  ir ifr hwaddr sa data          cleanup  close the socket connection        err cleanup  close sock      JNIEXPORT jbyteArray JNICALL Java com example getmymac GetMyMacActivity get 1mac 1addr JNIEnv  env  jobject thiz                                                            jstring interface name           first  allocate space for the MAC address         jbyteArray mac addr     env - gt NewByteArray env  MAC ARR LEN       int error   0          then just call  get mac by ifname  function        get mac by ifname interface name  env  mac addr   amp error        return mac addr     And finally  CMakeLists txt file cmake minimum required VERSION 3 4 1  add library net-utils SHARED src main cpp net-utils c  target link libraries net-utils android log

User · Answer

Taken from the Android sources here  This is the actual code that shows your MAC ADDRESS in the system s settings app   private void refreshWifiInfo         WifiInfo wifiInfo   mWifiManager getConnectionInfo         Preference wifiMacAddressPref   findPreference KEY MAC ADDRESS       String macAddress   wifiInfo    null   null   wifiInfo getMacAddress        wifiMacAddressPref setSummary  TextUtils isEmpty macAddress    macAddress               getActivity   getString R string status unavailable         Preference wifiIpAddressPref   findPreference KEY CURRENT IP ADDRESS       String ipAddress   Utils getWifiIpAddresses getActivity         wifiIpAddressPref setSummary ipAddress    null               getActivity   getString R string status unavailable    ipAddress

User · Answer

Getting the MAC address through WifiInfo getMacAddress   won t work on Marshmallow and above  it has been disabled and will return the constant value of 02 00 00 00 00 00

User · Answer

You can no longer get the hardware MAC address of a android device  WifiInfo getMacAddress   and BluetoothAdapter getAddress   methods will return 02 00 00 00 00 00  This restriction was introduced in Android 6 0   But Rob Anderson found a solution which is working for  lt  Marshmallow   https   stackoverflow com a 35830358

User · Answer

I think I just found a way to read MAC addresses without LOCATION permission  Run ip link and parse its output   you could probably do the similar by looking at this binary s source code

User · Answer

This ip link   grep -A1 wlan0 command works on Android 9 from How to determine wifi hardware address in Termux

User · Answer

I founded this solution from http   robinhenniges com en android6-get-mac-address-programmatically and it s working for me  Hope helps     public static String getMacAddr         try           List lt NetworkInterface gt  all   Collections list NetworkInterface getNetworkInterfaces             for  NetworkInterface nif   all                if   nif getName   equalsIgnoreCase  wlan0    continue               byte   macBytes   nif getHardwareAddress                if  macBytes    null                    return                                StringBuilder res1   new StringBuilder                for  byte b   macBytes                    String hex   Integer toHexString b  amp  0xFF                   if  hex length      1                      hex    0  concat hex                   res1 append hex concat                                   if  res1 length    gt  0                    res1 deleteCharAt res1 length   - 1                             return res1 toString                    catch  Exception ex              return

User · Answer

lt uses-permission android name  android permission ACCESS WIFI STATE    gt   public String getMacAddress Context context        WifiManager wimanager    WifiManager  context getSystemService Context WIFI SERVICE       String macAddress   wimanager getConnectionInfo   getMacAddress        if  macAddress    null            macAddress    Device don t have mac address or wi-fi is disabled             return macAddress      have others way here

User · Answer

As was already pointed out in the comment  the MAC address can be received via the WifiManager  WifiManager manager    WifiManager  getSystemService Context WIFI SERVICE   WifiInfo info   manager getConnectionInfo    String address   info getMacAddress     Also do not forget to  add the appropriate permissions into your AndroidManifest xml  lt uses-permission android name  quot android permission ACCESS WIFI STATE quot   gt   Please refer to Android 6 0 Changes   To provide users with greater data protection  starting in this release  Android removes programmatic access to the device   s local hardware identifier for apps using the Wi-Fi and Bluetooth APIs  The WifiInfo getMacAddress   and the BluetoothAdapter getAddress   methods now return a constant value of 02 00 00 00 00 00  To access the hardware identifiers of nearby external devices via Bluetooth and Wi-Fi scans  your app must now have the ACCESS FINE LOCATION or ACCESS COARSE LOCATION permissions

[java] Programmatically getting the MAC of an Android device

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