【Android】不同方式获取Mac地址

（1） 调用android 的API： NetworkInterface. getHardwareAddress ()

该API的level为9，只有android 2.3以上才有该接口

（2） 调用java 的方法： nbtstat/arp

一般android不支持这两个命令。该方法没有试过。

（3） 调用Android的API： WifiManager

权限：

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

代码：

/**
* 通过wifiManager获取mac地址
* @attention Wifi
* @return Mac Address
*/
private static String getMacFromWifi(Context context){
WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
if (!wifiManager.isWifiEnabled()) {
wifiManager.setWifiEnabled(true);
}
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
String mResult = wifiInfo.getMacAddress();
Log.i(TAG_NETWORK,"Mac address(wifi): "+mResult);
return mResult;
}

这个是需要设备开通Wifi连接，获取到网卡的MAC地址

另，贴上，判断当前是否为wifi连接方式：

//判断当前是否使用wifi连接
private static boolean isWifiConnected(Context context){
ConnectivityManager cm;
cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
boolean result = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState() == NetworkInfo.State.CONNECTED ? true : false ;

Log.i(TAG_NETWORK,"isWifiConnected: "+result);
return result;
}

（4） 调用Linux的busybox

/**
* 通过callCmd("busybox ifconfig","HWaddr")获取mac地址
* @attention 需要设备装有busybox工具
* @return Mac Address
*/
private static String getMacFromCallCmd(){
String result = "";
result = callCmd("busybox ifconfig","HWaddr");

if(result == null || result.length() <= 0){
Log.i(TAG_NETWORK,"callCmd returns null or empty");
return null;
}

//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){
String Mac = result.substring(result.indexOf("HWaddr")+6, result.length()-1);
Log.i(TAG_NETWORK,"Mac:"+Mac+" Mac.length: "+Mac.length());
if(Mac.length()>1){
Mac = Mac.replaceAll(" ", "");
result = "";

String[] tmp = Mac.split(":");
for(int i = 0;i<tmp.length;++i){
result +=tmp[i];
}
}

Log.i(TAG_NETWORK,result+" result.length: "+result.length());
}
Log.i(TAG_NETWORK,"Mac address(CallCmd): "+result);

return result;
}

其他相关函数：

public 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);

//执行命令cmd，只取结果中含有filter的这一行
while ((line = br.readLine ()) != null && line.contains(filter)== false) {
//result += line;
Log.i("test","line: "+line);
}

result = line;
Log.i("test","result: "+result);
}
catch(Exception e) {
e.printStackTrace();
}
return result;
}

这个需要设备支持busybox工具。现在发现一些设备是没有安装该工具的，这时使用该方法，会报错。

（5）查询记录了MAC地址的文件“/proc/net/arp”

需要有这个文件，并且记录了相应的内容

/**
* get the Mac Address from the file /proc/net/arp
* @param context
* @attention the file /proc/net/arp need exit
* @return Mac Address
*/
private static String getMacFromFile(Context context){
String mIP = Config.getIpAddress(context);
if(mIP == null || mIP.length()<=0)
return null;

List<String> mResult = readFileLines("/proc/net/arp");

Log.d(TAG_NETWORK,"=======  /proc/net/arp  =========");
for(int i =0;i<mResult.size();++i)
Log.d("line",mResult.get(i));
Log.d(TAG_NETWORK,"===========================");

if(mResult !=null && mResult.size()>1){
for(int j =1;j<mResult.size();++j){
List<String> mList = new ArrayList<String>();
String[] mType = mResult.get(j).split(" ");
for(int i =0;i<mType.length;++i){
if(mType[i]!=null && mType[i].length()>0)
mList.add(mType[i]);
}

if(mList!=null && mList.size()>4 && mList.get(0).equalsIgnoreCase(mIP)){
String result="";
String[] tmp = mList.get(3).split(":");
for(int i = 0;i<tmp.length;++i){
result +=tmp[i];
}
result = result.toUpperCase();
Log.i(TAG_NETWORK,"Mac address(file): "+result);
return result;
}
}
}
return null;
}

/**
* 以行为单位读取文件，常用于读面向行的格式化文件
*/
private static List<String> readFileLines(String fileName) {
File file = new File(fileName);
BufferedReader reader = null;
String tempString ="";
List<String> mResult = new ArrayList<String>();
try {
Log.i("result","以行为单位读取文件内容，一次读一整行：");
reader = new BufferedReader(new FileReader(file));
while((tempString = reader.readLine())!=null){
mResult.add(tempString);
}
reader.close();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e1) {
}
}
}

return mResult;
}

记录了MAC地址的文件“/proc/net/arp”内容大致如下：

IP address HW type Flags HW address Mask Device

10.63.253.193 0x1 0x2 00:11:92:06:85:3f * eth0

10.63.253.194 0x1 0x2 00:11:92:06:85:3a * eth1

10.63.253.195 0x1 0x2 00:11:92:06:85:3b * eth2