1.关于获取mac地址的一些方法
第一种方法:读取sys/class/net/路径下的文件
FileInputStream fis_name = null;
FileInputStream fis = null;
try {
//interfaceName 可以直接填写 eth0
String path = "sys/class/net/"+interfaceName+"/address";
fis_name = new FileInputStream(path);
byte[] buffer_name = new byte[1024 * 8];
int byteCount_name = fis_name.read(buffer_name);
if (byteCount_name > 0) {
mac = new String(buffer_name, 0, byteCount_name, "utf-8");
}
if (mac.length() == 0) {
path = "sys/class/net/eth0/wlan0";
fis = new FileInputStream(path);
byte[] buffer = new byte[1024 * 8];
int byteCount = fis.read(buffer);
if (byteCount > 0) {
mac = new String(buffer, 0, byteCount, "utf-8");
}
}
} catch (Exception e) {
e.printStackTrace();
}finally {
if(fis_name != null){
try {
fis_name.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(fis != null){
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
可是上面的方法如果没有放开该文件的读写权限,是读取不到的;
现在介绍另外一种方法:
方法2:采用ConnectivityManager
1.获取连接的网络信息
ConnectivityManager cm = (ConnectivityManager) context.getApplicationContext().getSystemService(Service.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = cm.getActiveNetworkInfo();
上面是获取当前连接的网络信息对象,如果要使用它,一定要对该对象进行判空和连接的状态判断
可以将当前的网络连接信息全部打印出来
if(activeNetworkInfo != null && activeNetworkInfo.isConnected()){
Log.i("NetworkInfo info : " +cm.getLinkProperties(cm.getActiveNetwork()).toString() );
}
2.获取mac地址(仅以太网连接的情况下,wifi获取的是当前的wifi名称)
String extraInfo = activeNetworkInfo.getExtraInfo();
3.获取ip信息
List<LinkAddress> linkAddresses = cm.getLinkProperties(cm.getActiveNetwork()).getLinkAddresses();
//获取当前连接的网络ip地址信息
if(linkAddresses != null && !linkAddresses.isEmpty()){
//注意:同时可以查看到两个网口的信息,但是ip地址不是固定的位置(即下标)
//所以遍历的时候需要判断一下当前获取的ip地址是否符合ip地址的正则表达式
for (int i = 0; i < linkAddresses.size(); i++) {
InetAddress address = linkAddresses.get(i).getAddress();
//判断ip地址的正则表达
if(isCorrectIp(address.getHostAddress())){
Log.i("ip地址"+address.getHostAddress())
}
}
}
4.获取网关地址信息:
List<RouteInfo> routes = cm.getLinkProperties(cm.getActiveNetwork()).getRoutes();
if(routes != null && !routes.isEmpty()){
for (int i = 0; i < routes.size(); i++) {
//和ip地址一样,需要判断获取的网址符不符合正则表达式
String hostAddress = routes.get(i).getGateway().getHostAddress();
if(isCorrectIp(hostAddress)){
Log.i("网关信息:" + hostAddress);
}
}
}
5.获取dns信息:
List<InetAddress> dnsServers = cm.getLinkProperties(cm.getActiveNetwork()).getDnsServers();
if(dnsServers != null && dnsServers.size() >= 2){
Log.i("dns1 " + dnsServers.get(0).toString());
Log.i("dns2 " + dnsServers.get(1).toString());
}
6:获取子网掩码地址
/**
* 获取子网掩码
* @param interfaceName
* @return
*/
public static String getIpAddressMaskForInterfaces(String interfaceName) {
//"eth0"
try {
//获取本机所有的网络接口
Enumeration<NetworkInterface> networkInterfaceEnumeration = NetworkInterface.getNetworkInterfaces();
//判断 Enumeration 对象中是否还有数据
while (networkInterfaceEnumeration.hasMoreElements()) {
//获取 Enumeration 对象中的下一个数据
NetworkInterface networkInterface = networkInterfaceEnumeration.nextElement();
if (!networkInterface.isUp() && !interfaceName.equals(networkInterface.getDisplayName())) {
//判断网口是否在使用,判断是否时我们获取的网口
continue;
}
for (InterfaceAddress interfaceAddress : networkInterface.getInterfaceAddresses()) {
if (interfaceAddress.getAddress() instanceof Inet4Address) {
//仅仅处理ipv4
//获取掩码位数,通过 calcMaskByPrefixLength 转换为字符串
return calcMaskByPrefixLength(interfaceAddress.getNetworkPrefixLength());
}
}
}
} catch (SocketException e) {
e.printStackTrace();
}
return "0.0.0.0";
}
通过获取网口名调用该方法
getIpAddressMaskForInterfaces(cm.getLinkProperties(cm.getActiveNetwork()).getInterfaceName())
以上则是通用获取网络信息的方式;wifi和以太网都可以用,可以试一下;
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