android 获取以太网的动态IP地址，子网掩码，DNS地址，网关地址

局域网的配置,之前查找了很多方法都是关于EthernetManager（已隐藏，无法直接调用），试过很多种但是还是没成功调到过这个对象，然后直接利用adb 命令获取
获取以太网的连接信息
1.获取所有有效网关

/**
     * @return 获取所有有效的网卡
     */
    public static String[] getAllNetInterface() {
        ArrayList<String> availableInterface = new ArrayList<>();
        String[] interfaces = null;
        try {
            //获取本地设备的所有网络接口
            Enumeration nis = NetworkInterface.getNetworkInterfaces();
            InetAddress ia = null;
            while (nis.hasMoreElements()) {
                NetworkInterface ni = (NetworkInterface) nis.nextElement();
                Enumeration<InetAddress> ias = ni.getInetAddresses();
                while (ias.hasMoreElements()) {
                    ia = ias.nextElement();
                    if (ia instanceof Inet6Address) {
                        continue;// skip ipv6
                    }
                    String ip = ia.getHostAddress();
                    // 过滤掉127段的ip地址
                    if (!"127.0.0.1".equals(ip)) {
                        if (ni.getName().substring(0, 3).equals("eth")) {//筛选出以太网
                            availableInterface.add(ni.getName());
                        }
                    }
                }
            }

        } catch (SocketException e) {
            e.printStackTrace();
        }
        int size = availableInterface.size();
        if (size > 0) {
            interfaces = new String[size];
            for (int i = 0; i < size; i++) {
                interfaces[i] = availableInterface.get(i);
            }
        }
        return interfaces;
    }

2.获取指定网卡ip

/**
     * 获取指定网卡ip
     *
     * @param netInterface
     * @return
     * @throws SocketException
     */
    public static String getIpAddress(String netInterface) throws SocketException {
        String hostIp = null;
        try {
            Enumeration nis = NetworkInterface.getNetworkInterfaces();
            InetAddress ia = null;
            while (nis.hasMoreElements()) {
                NetworkInterface ni = (NetworkInterface) nis.nextElement();
                if (ni.getName().equals(netInterface)) {
                    Enumeration<InetAddress> ias = ni.getInetAddresses();
                    while (ias.hasMoreElements()) {
                        ia = ias.nextElement();
                        if (ia instanceof Inet6Address) {
                            continue;// skip ipv6
                        }
                        String ip = ia.getHostAddress();
                        // 过滤掉127段的ip地址
                        if (!"127.0.0.1".equals(ip)) {
                            hostIp = ia.getHostAddress();
                            break;
                        }
                    }
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }
        return hostIp;
    }

3.获取DNS地址 ----“getprop dhcp.eth0.dns1”

 /**
     * 根据adb shell命令获取
     * DNS地址
     *
     * @param name网卡名称
     * @return
     */
    public static String getLocalDNS(String name) {
        Process cmdProcess = null;
        BufferedReader reader = null;
        String dnsIP = "";
        try {
            cmdProcess = Runtime.getRuntime().exec("getprop dhcp." + name + ".dns1");
            reader = new BufferedReader(new InputStreamReader(cmdProcess.getInputStream()));
            dnsIP = reader.readLine();
            return dnsIP;
        } catch (IOException e) {
            return null;
        } finally {
            try {
                reader.close();
            } catch (IOException e) {
            }
            cmdProcess.destroy();
        }
    }

4.获取子网掩码----“getprop dhcp.eth0.mask”

/**
     * 获取掩码
     *
     * @param name
     * @return
     */
    public static String getLocalMask(String name) {
        Process cmdProcess = null;
        BufferedReader reader = null;
        String dnsIP = "";
        try {
            cmdProcess = Runtime.getRuntime().exec("getprop dhcp." + name + ".mask");
            reader = new BufferedReader(new InputStreamReader(cmdProcess.getInputStream()));
            dnsIP = reader.readLine();
            return dnsIP;
        } catch (IOException e) {
            return null;
        } finally {
            try {
                reader.close();
            } catch (IOException e) {
            }
            cmdProcess.destroy();
        }
    }

5.网关地址----“getprop dhcp.eth0.gateway”

 /**
     * 获取网关地址
     *
     * @param name
     * @return
     */
    public static String getLocalGATE(String name) {
        Process cmdProcess = null;
        BufferedReader reader = null;
        String dnsIP = "";
        try {
            cmdProcess = Runtime.getRuntime().exec("getprop dhcp." + name + ".gateway");
            reader = new BufferedReader(new InputStreamReader(cmdProcess.getInputStream()));
            dnsIP = reader.readLine();
            return dnsIP;
        } catch (IOException e) {
            return null;
        } finally {
            try {
                reader.close();
            } catch (IOException e) {
            }
            cmdProcess.destroy();
        }
    }

https://github.com/huahua22/IPDemo