Android獲取Mac地址及IP地址需要新增許可權，

在AndroidManifest.xml中：

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

1、獲取手機的Mac地址，在Wifi未開啟或者未連線的情況下也能獲取手機Mac地址，程式碼如下：

public static String getMacAddress(Context context) {
    String macAddress = null;
    WifiInfo wifiInfo = getWifiInfo(context);
    if
 
 (wifiInfo != null) {
        macAddress = wifiInfo.getMacAddress();
    }
    return macAddress;
}

2、獲取手機IP地址，只有在Wifi連線的情況下才能獲取IP地址，否則為0，對應轉換IP為0.0.0.0，其中getIpAddress()獲取的IP地址是整型，需要轉換為IP地址。程式碼如下：

public static String getIpAddress(Context context) {
    String IpAddress = null;
    WifiInfo wifiInfo = getWifiInfo(context);
    if
 
 (wifiInfo != null) {
        IpAddress = intToIpAddress(wifiInfo.getIpAddress());
    }
    return IpAddress;
}

public static String intToIpAddress(long ipInt) {
    StringBuffer sb = new StringBuffer();
    sb.append(ipInt & 0xFF).append(".");
    sb.append((ipInt >> 8) & 0xFF).append("."
 
);
    sb.append((ipInt >> 16) & 0xFF).append(".");
    sb.append((ipInt >> 24) & 0xFF);
    return sb.toString();
}

3、獲取路由器的Mac地址，只有連線成功才能獲取（廢話…），程式碼如下：

public static String getConnectedWifiMacAddress(Context context) {
    String connectedWifiMacAddress = null;
    WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    List<ScanResult> wifiList;

    if (wifiManager != null) {
        wifiList = wifiManager.getScanResults();
        WifiInfo info = wifiManager.getConnectionInfo();
        if (wifiList != null && info != null) {
            for (int i = 0; i < wifiList.size(); i++) {
                ScanResult result = wifiList.get(i);
                if (info.getBSSID().equals(result.BSSID)) {
                    connectedWifiMacAddress = result.BSSID;
                }
            }
        }
    }
    return connectedWifiMacAddress;
}

完整的獲取Mac及IP地址工具類程式碼如下：

package com.cpxiao.wifimacdemo;

import android.content.Context;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;

import java.util.List;

/**
 * Created by cpxiao on 15/9/21.
 */
public class MacAddressUtils {

    /**
     * 獲取手機的Mac地址，在Wifi未開啟或者未連線的情況下也能獲取手機Mac地址
     */
    public static String getMacAddress(Context context) {
        String macAddress = null;
        WifiInfo wifiInfo = getWifiInfo(context);
        if (wifiInfo != null) {
            macAddress = wifiInfo.getMacAddress();
        }
        return macAddress;
    }

    /**
     * 獲取手機的Ip地址
     */
    public static String getIpAddress(Context context) {
        String IpAddress = null;
        WifiInfo wifiInfo = getWifiInfo(context);
        if (wifiInfo != null) {
            IpAddress = intToIpAddress(wifiInfo.getIpAddress());
        }
        return IpAddress;
    }

    /**
     * 獲取WifiInfo
     */
    public static WifiInfo getWifiInfo(Context context) {
        WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
        WifiInfo info = null;
        if (null != wifiManager) {
            info = wifiManager.getConnectionInfo();
        }
        return info;
    }


    public static long ipAddressToint(String ip) {
        String[] items = ip.split("\\.");
        return Long.valueOf(items[0]) << 24
                | Long.valueOf(items[1]) << 16
                | Long.valueOf(items[2]) << 8
                | Long.valueOf(items[3]);
    }

    public static String intToIpAddress(long ipInt) {
        StringBuffer sb = new StringBuffer();
        sb.append(ipInt & 0xFF).append(".");
        sb.append((ipInt >> 8) & 0xFF).append(".");
        sb.append((ipInt >> 16) & 0xFF).append(".");
        sb.append((ipInt >> 24) & 0xFF);
        return sb.toString();
    }

    /**
     * 獲取當前可連線Wifi列表
     */
    public static List<?> getAvailableNetworks(Context context) {
        WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
        List<ScanResult> wifiList = null;
        if (wifiManager != null) {
            wifiList = wifiManager.getScanResults();
        }
        return wifiList;
    }

    /**
     * 獲取已連線的Wifi路由器的Mac地址
     */
    public static String getConnectedWifiMacAddress(Context context) {
        String connectedWifiMacAddress = null;
        WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
        List<ScanResult> wifiList;

        if (wifiManager != null) {
            wifiList = wifiManager.getScanResults();
            WifiInfo info = wifiManager.getConnectionInfo();
            if (wifiList != null && info != null) {
                for (int i = 0; i < wifiList.size(); i++) {
                    ScanResult result = wifiList.get(i);
                    if (info.getBSSID().equals(result.BSSID)) {
                        connectedWifiMacAddress = result.BSSID;
                    }
                }
            }
        }
        return connectedWifiMacAddress;
    }
}