获取手机设备的mac地址

由于项目中需要获取手机mac地址作为标识此手机的唯一标识，于是就在网上搜如何获取mac地址的资料，目前看到最多的就是

public String getLocalMacAddress() {                 WifiManager wifi = (WifiManager)getSystemService(Context.WIFI_SERVICE);                WifiInfo info = wifi.getConnectionInfo();                return info.getMacAddress();             }

根据wifi信息来获取的，但是此方法是在wifi连接的时候才能获取，断开wifi就不能了，不符合要求，继续找，后来发现一个

public static String getLocalIpAddress() { try {              String ipv4;                  ArrayList<NetworkInterface>  nilist = Collections.list(NetworkInterface.getNetworkInterfaces());              for (NetworkInterface ni: nilist)               {                ArrayList<InetAddress> ialist = Collections.list(ni.getInetAddresses());                 for (InetAddress address: ialist)       {                         if (!address.isLoopbackAddress() &&InetAddressUtils.isIPv4Address(ipv4=address.getHostAddress()))                     {                         return ipv4;                    }                }            }           } catch (SocketException ex) {        }        return null;  } public static String getLocalMacAddressFromIp(Context context) { String mac_s= "";     try {             byte[] mac;             NetworkInterface ne =                      NetworkInterface.getByInetAddress(InetAddress.getByName(getLocalIpAddress()));             mac = ne.getHardwareAddress();             System.out.println("mac======="+mac);             mac_s = byte2hex(mac);             } catch (Exception e) {                          e.printStackTrace();             }         return mac_s; }  public static  String byte2hex(byte[] b) {           StringBuffer hs = new StringBuffer(b.length);           String stmp = "";           int len = b.length;           for (int n = 0; n < len; n++)      {               stmp = Integer.toHexString(b[n] & 0xFF);               if(stmp.length() == 1){                   hs = hs.append("0").append(stmp);       }else {                   hs = hs.append(stmp);                    }           }           return String.valueOf(hs);  }

根据ip地址来获取的，还是不行，因为ip地址是一定要在有网的情况下才有的，否则是0。

最后发现一个，此方法在断网的情况下能获取到，OK，解决

  public String getMacAddress(){          String macSerial = null;            String str = "";            try {                    Process pp = Runtime.getRuntime().exec(                                    "cat /sys/class/net/wlan0/address ");                    InputStreamReader ir = new InputStreamReader(pp.getInputStream());                    LineNumberReader input = new LineNumberReader(ir);                    for (; null != str;) {                            str = input.readLine();                            if (str != null) {                                    macSerial = str.trim();// 去空格                                    break;                            }                    }            } catch (IOException ex) {                    // 赋予默认值                    ex.printStackTrace();            }            return macSerial;    }  

不好意思,上面的方法有时候也获取不到,所以如果要取设备的一个参数当做唯一标识，还是取DEVICE_ID,比较靠谱。

/** * 获取设备唯一标识DEVICE_ID * @return */    public String getDeviceID()    {    TelephonyManager tm = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);     String DEVICE_ID = tm.getDeviceId();     return DEVICE_ID;    }