您可以找到路由器的Mac地址，并将其用作唯一标识它的基础。

您可以通过检查您的Android设备ARP表并比较您连接的路由器IP来完成此操作。示例如下所示：

http://www.flattermann.net/2011/02/android-howto-find-the-hardware-mac-address-of-a-remote-host/

提取相关代码：

/**
 * Try to extract a hardware MAC address from a given IP address using the
 * ARP cache (/proc/net/arp).<br>
 * We assume that the file has this structure:<br>
 * IP address       HW type     Flags       HW address            Mask     Device
 * 192.168.18.11    0x1         0x2         00:04:20:06:55:1a     *        eth0
 * 192.168.18.36    0x1         0x2         00:22:43:ab:2a:5b     *        eth0
 * @param ip
 * @return the MAC from the ARP cache
public static String getMacFromArpCache(String ip) {
    if (ip == null)
        return null;
    BufferedReader br = null;
    try {
        br = new BufferedReader(new FileReader("/proc/net/arp"));
        String line;
        while ((line = br.readLine()) != null) {
            String[] splitted = line.split(" +");
            if (splitted != null && splitted.length >= 4 && ip.equals(splitted[0])) {
                // Basic sanity check
                String mac = splitted[3];
                if (mac.matches("..:..:..:..:..:..")) {
                    return mac;
                } else {
                    return null;
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            br.close();