android 6.0以下mac地址获取

我们获取mac地址一般都是这样写的：

/** * 根据wifi信息获取本地mac * @param context * @return */ public static String getLocalMacAddressFromWifiInfo(Context context){ WifiManager wifi = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); WifiInfo winfo = wifi.getConnectionInfo(); String mac = winfo.getMacAddress(); return mac; }

android 6.0及以上、7.0以下

Android 6.0以后 将不再能通过 wifimanager 获取mac，获取到的mac将是固定的：02:00:00:00:00:00 。

然而我开发的sdk就是通过wifimanager获取的mac。

android sdk后来做了6.0适配，通过cat /sys/class/net/wlan0/address，可以在6.0上获取mac地址。

/** * 获取mac地址 * @param context * @return */ public static String getMacAddress(Context context){ //如果是6.0以下，直接通过wifimanager获取 if(Build.VERSION.SDK_INT<Build.VERSION_CODES.M){ String macAddress0 = getMacAddress0(context); if(!TextUtils.isEmpty(macAddress0)){ return macAddress0; } } String str=""; String macSerial=""; 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 (Exception ex) { Log.e("----->" + "NetInfoManager", "getMacAddress:" + ex.toString()); } if (macSerial == null || "".equals(macSerial)) { try { return loadFileAsString("/sys/class/net/eth0/address") .toUpperCase().substring(0, 17); } catch (Exception e) { e.printStackTrace(); Log.e("----->" + "NetInfoManager", "getMacAddress:" + e.toString()); } } return macSerial; } private static String getMacAddress0(Context context) { if (isAccessWifiStateAuthorized(context)) { WifiManager wifiMgr = (WifiManager) context .getSystemService(Context.WIFI_SERVICE); WifiInfo wifiInfo = null; try { wifiInfo = wifiMgr.getConnectionInfo(); return wifiInfo.getMacAddress(); } catch (Exception e) { Log.e("----->" + "NetInfoManager", "getMacAddress0:" + e.toString()); } } return ""; } /** * Check whether accessing wifi state is permitted * * @param context * @return */ private static boolean isAccessWifiStateAuthorized(Context context) { if (PackageManager.PERMISSION_GRANTED == context .checkCallingOrSelfPermission("android.permission.ACCESS_WIFI_STATE")) { Log.e("----->" + "NetInfoManager", "isAccessWifiStateAuthorized:" + "access wifi state is enabled"); return true; } else return false; } private static String loadFileAsString(String fileName) throws Exception { FileReader reader = new FileReader(fileName); String text = loadReaderAsString(reader); reader.close(); return text; } private static String loadReaderAsString(Reader reader) throws Exception { StringBuilder builder = new StringBuilder(); char[] buffer = new char[4096]; int readLength = reader.read(buffer); while (readLength >= 0) { builder.append(buffer, 0, readLength); readLength = reader.read(buffer); } return builder.toString(); }

android 7.0及以上

android 7.0 后，通过上述适配的方法，将获取不到mac地址。

经过调研和测试，7.0上仍有办法回去mac地址：

（1）通过ip地址来获取绑定的mac地址

/** * 获取移动设备本地IP * @return */ private static InetAddress getLocalInetAddress() { InetAddress ip = null; try { //列举 Enumeration<NetworkInterface> en_netInterface = NetworkInterface.getNetworkInterfaces(); while (en_netInterface.hasMoreElements()) {//是否还有元素 NetworkInterface ni = (NetworkInterface) en_netInterface.nextElement();//得到下一个元素 Enumeration<InetAddress> en_ip = ni.getInetAddresses();//得到一个ip地址的列举 while (en_ip.hasMoreElements()) { ip = en_ip.nextElement(); if (!ip.isLoopbackAddress() && ip.getHostAddress().indexOf(":") == -1) break; else ip = null; } if (ip != null) { break; } } } catch (SocketException e) { e.printStackTrace(); } return ip; } /** * 获取本地IP * @return */ private static String getLocalIpAddress() { try { for (Enumeration<NetworkInterface> en = NetworkInterface .getNetworkInterfaces(); en.hasMoreElements();) { NetworkInterface intf = en.nextElement(); for (Enumeration<InetAddress> enumIpAddr = intf .getInetAddresses(); enumIpAddr.hasMoreElements();) { InetAddress inetAddress = enumIpAddr.nextElement(); if (!inetAddress.isLoopbackAddress()) { return inetAddress.getHostAddress().toString(); } } } } catch (SocketException ex) { ex.printStackTrace(); } return null; } /** * 根据IP地址获取MAC地址 * @return */ public static String getMacAddress(){ String strMacAddr = null; try { //获得IpD地址 InetAddress ip = getLocalInetAddress(); byte[] b = NetworkInterface.getByInetAddress(ip).getHardwareAddress(); StringBuffer buffer = new StringBuffer(); for (int i = 0; i < b.length; i++) { if (i != 0) { buffer.append(':'); } String str = Integer.toHexString(b[i] & 0xFF); buffer.append(str.length() == 1 ? 0 + str : str); } strMacAddr = buffer.toString().toUpperCase(); } catch (Exception e) { } return strMacAddr; }

（2）扫描各个网络接口获取mac地址

/** * 获取设备HardwareAddress地址 * @return */ public static String getMachineHardwareAddress(){ Enumeration<NetworkInterface> interfaces = null; try { interfaces = NetworkInterface.getNetworkInterfaces(); } catch (SocketException e) { e.printStackTrace(); } String hardWareAddress = null; NetworkInterface iF = null; while (interfaces.hasMoreElements()) { iF = interfaces.nextElement(); try { hardWareAddress = bytesToString(iF.getHardwareAddress()); if(hardWareAddress != null) break; } catch (SocketException e) { e.printStackTrace(); } } return hardWareAddress ; } /*** * byte转为String * @param bytes * @return */ private static String bytesToString(byte[] bytes){ if (bytes == null || bytes.length == 0) { return null ; } StringBuilder buf = new StringBuilder(); for (byte b : bytes) { buf.append(String.format("%02X:", b)); } if (buf.length() > 0) { buf.deleteCharAt(buf.length() - 1); } return buf.toString(); }

（3）通过busybox获取本地存储的mac地址

/** * 根据busybox获取本地Mac * @return */ public static String getLocalMacAddressFromBusybox(){ String result = ""; String Mac = ""; result = callCmd("busybox ifconfig","HWaddr"); //如果返回的result == null，则说明网络不可取 if(result==null){ return "网络异常"; } //对该行数据进行解析 //例如：eth0 Link encap:Ethernet HWaddr 00:16:E8:3E:DF:67 if(result.length()>0 && result.contains("HWaddr")==true){ Mac = result.substring(result.indexOf("HWaddr")+6, result.length()-1); result = Mac; } return result; } private static String callCmd(String cmd,String filter) { String result = ""; String line = ""; try { Process proc = Runtime.getRuntime().exec(cmd); InputStreamReader is = new InputStreamReader(proc.getInputStream()); BufferedReader br = new BufferedReader (is); while ((line = br.readLine ()) != null && line.contains(filter)== false) { result += line; } result = line; } catch(Exception e) { e.printStackTrace(); } return result; }

对比效果截图

上述三种方法，对比我开发的sdk现在使用的方法以及通过wifimanager获取mac地址的方法，效果如下（7.0设备有限，只覆盖部分机型）：

结论

通过上述对比，通过ip获取mac地址和扫描网络接口获取mac结合使用，可以达到准确的效果。

通过ip获取的mac地址优先级高，只有在它获取不到的情况下，再使用扫描网络接口获取的mac地址。

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