获取mac地址分为三段
1.Android 6.0 之前（不包括6.0）
2.Android 6.0（包括） - Android 7.0（不包括）
3.Android7.0（包括）之后
获取方法
/**
* Android 6.0 之前（不包括6.0）
* 必须的权限
* @param context
* @return
*/
private static StringgetMacDefault(Context context) {
String mac ="02:00:00:00:00:00";
if (context ==null) {
return mac;
}
WifiManager wifi = (WifiManager) context.getApplicationContext()
.getSystemService(Context.WIFI_SERVICE);
if (wifi ==null) {
return mac;
}
WifiInfo info =null;
try {
info = wifi.getConnectionInfo();
}catch (Exception e) {
}
if (info ==null) {
return null;
}
mac = info.getMacAddress();
if (!TextUtils.isEmpty(mac)) {
mac = mac.toUpperCase(Locale.ENGLISH);
}
return mac;
}
/**
* Android 6.0（包括） - Android 7.0（不包括）
* @return
*/
private static StringgetMacFromFile() {
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;
}
private static StringloadFileAsString(String fileName)throws Exception {
FileReader reader =new FileReader(fileName);
String text =loadReaderAsString(reader);
reader.close();
return text;
}
private static StringloadReaderAsString(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();
}
/**7.0之后
* 遍历循环所有的网络接口，找到接口是 wlan0
* 必须的权限
* @return
*/
private static StringgetMacFromHardware() {
try {
List 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() >0) {
res1.deleteCharAt(res1.length() -1);
}
return res1.toString();
}
}catch (Exception e) {
e.printStackTrace();
}
return "02:00:00:00:00:00";
}
调用方法
/**
* 获取mac地址
*
* @return
*/
private static StringgetMacAddress(Context context) {
String mac ="02:00:00:00:00:00";
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
mac =getMacDefault(context);
}else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
mac =getMacFromFile();
}else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
mac =getMacFromHardware();
}
return mac;
}
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