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在做用户信息统计时，发现 安卓6.0系统用户返回的Mac地址都是 02:00:00:00:00:00，被误判为作弊用户，实际上是谷歌在6.0及以后版本对获取wifi及蓝牙MacAddress 做的改动。

Most notably, Local WiFi and Bluetooth MAC addresses are no longer available. The getMacAddress() method of a WifiInfo object and the BluetoothAdapter.getDefaultAdapter().getAddress() method will both return 02:00:00:00:00:00 from now on.

 

也就是早先的：

 

WifiManager wifiManager=(WifiManager) getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo=wifiManager.getConnectionInfo();
String mac=wifiInfo.getMacAddress();

方法在安卓6.0系统上获取到的Mac 都是 02:00:00:00:00:00。刚开始以为权限不够，但权限都给了之后还是获取到02：00信息，说明不是权限问题。查寻资料还可以通过获取设备网络设备信息的API—— NetworkInterface.getNetworkInterfaces() 去获取。

 

 

 

Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
while (interfaces.hasMoreElements()) {NetworkInterface iF = interfaces.nextElement();byte[] addr = iF.getHardwareAddress();if (addr == null || addr.length == 0) {continue;}StringBuilder buf = new StringBuilder();for (byte b : addr) {buf.append(String.format("%02X:", b));}if (buf.length() > 0) {buf.deleteCharAt(buf.length() - 1);}String mac = buf.toString();Log.d("---mac", "interfaceName="+iF.getName()+", mac="+mac);
}

 

 

 

用 Genymotion 虚拟机运行的6.0系统，打印如下：

---mac: interfaceName=eth0, mac=08:00:27:75:9A:98
---mac: interfaceName=eth1, mac=08:00:27:DF:43:CA
---mac: interfaceName=ifb0, mac=BE:98:32:22:9A:51
---mac: interfaceName=ifb1, mac=7A:E0:26:3E:8D:D3

 

获取一个属性的Mac 地址如下：

 

public static String getMacAddress(Context context) {WifiManager wifiMgr = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);WifiInfo wifiInfo = wifiMgr.getConnectionInfo();String macAddress = null;StringBuffer buf = new StringBuffer();NetworkInterface networkInterface = null;try {networkInterface = NetworkInterface.getByName("eth1");if (networkInterface == null) {networkInterface = NetworkInterface.getByName("wlan0");}if (networkInterface == null) {return "02:00:00:00:00:02";}byte[] addr = networkInterface.getHardwareAddress();for (byte b : addr) {buf.append(String.format("%02X:", b));}if (buf.length() > 0) {buf.deleteCharAt(buf.length() - 1);}macAddress = buf.toString();} catch (SocketException e) {e.printStackTrace();return "02:00:00:00:00:02";}Log.i("----getMacAddress--1--", "" + buf.toString());return macAddress;}

 

 

可以通过 运行各版本手机的方法 对比测试

networkInterface = NetworkInterface.getByName("wlan0");  
来确定getByName 为哪个name 。

 

蓝牙Mac地址获取：

/*** 获取Mac地址*/
public class MacUtils {/*** 获取手机的MAC地址* * @return*/public static String getMac() {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) {ex.printStackTrace();}if (macSerial == null || "".equals(macSerial)) {try {return loadFileAsString("/sys/class/net/eth0/address").toUpperCase().substring(0, 17);} catch (Exception e) {e.printStackTrace();}}return macSerial;}public static String loadFileAsString(String fileName) throws Exception {FileReader reader = new FileReader(fileName);String text = loadReaderAsString(reader);reader.close();return text;}public 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();}	}

进行蓝牙相关操作要在AndroidManifest 进行蓝牙权限声明：

 

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

但通过4.4系统发现通过上面方法打印的结果 和 通过

 

 BluetoothManager bluetoothManager =(BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);BluetoothAdapter mBluetoothAdapter = bluetoothManager.getAdapter();String addressStr = mBluetoothAdapter.getAddress();

不太一样， 通过MacUtils 打印的 abcdef 都是小写字母， 通过getAddress 获得的是 大写字母，不过都是为了区分唯一性没有影响。