读取Android设备ip地址，mac地址，网关地址

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

package kanfang.qf.com.photeviewviewpager;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.DhcpInfo;
import android.net.NetworkInfo;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.widget.TextView;

import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

/**
 * Created by Administrator on 2016/9/23 0023.
 */
public class IPInfoActivity extends AppCompatActivity {

    public static String hostip;             //本机IP
    public static String hostmac;            //本机MAC

    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        TextView tv = new TextView(this);
        setContentView(tv);

        StringBuilder sb = new StringBuilder();
        sb.append("网络状态：").append(getCurrentNetType(this)).append("\n");
        ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = cm.getActiveNetworkInfo();
        if (info == null) {
            sb.append("获取IP 失败");
        } else if (info.getType() == ConnectivityManager.TYPE_WIFI) {
            try {
                sb.append("WIFI IP地址：").append(getWifiIp()).append("\nMAC地址：").append(getMacAddress());
            } catch (SocketException e) {
                e.printStackTrace();
            }
        } else if (info.getType() == ConnectivityManager.TYPE_MOBILE) {
            sb.append("手机 IP地址：").append(getIpAddress());

        }

        tv.setText(sb.toString());

    }

    public static String getIpAddress() {

        try {
            for (Enumeration<NetworkInterface> en = NetworkInterface
                    .getNetworkInterfaces(); en.hasMoreElements(); ) {
                NetworkInterface intf = en.nextElement();
                for (Enumeration<InetAddress> enumIpAddr = intf
                        .getInetAddresses(); enumIpAddr.hasMoreElements(); ) {
                    InetAddress inetAddress = enumIpAddr.nextElement();
                    if (!inetAddress.isLoopbackAddress()
                            && inetAddress instanceof Inet4Address) {
                        // if (!inetAddress.isLoopbackAddress() && inetAddress
                        // instanceof Inet6Address) {
                        return inetAddress.getHostAddress().toString();
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public String getWifiIp() {
        WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
        WifiInfo info = wifi.getConnectionInfo();
        DhcpInfo dhcp = wifi.getDhcpInfo();
        String mask = getIpStringByint(dhcp.netmask);
        String gateWay = getIpStringByint(dhcp.gateway);
        Log.d("ytmfdw", "掩码：" + mask);
        Log.d("ytmfdw", "网关：" + gateWay);
        // 获得IP地址的方法一：
        int ipAddress = info.getIpAddress();
        String ipString = "";
        ipString = getIpStringByint(ipAddress);
        return ipString;
    }

/*    public String getLocalMacAddress() {
        WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
        WifiInfo info = wifi.getConnectionInfo();
        return info.getMacAddress();
    }*/

    public static String getCurrentNetType(Context context) {
        String type = "";
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo info = cm.getActiveNetworkInfo();
        if (info == null) {
            type = "null";
        } else if (info.getType() == ConnectivityManager.TYPE_WIFI) {
            type = "wifi";
        } else if (info.getType() == ConnectivityManager.TYPE_MOBILE) {
            int subType = info.getSubtype();
            if (subType == TelephonyManager.NETWORK_TYPE_CDMA || subType == TelephonyManager.NETWORK_TYPE_GPRS
                    || subType == TelephonyManager.NETWORK_TYPE_EDGE) {
                type = "2g";
            } else if (subType == TelephonyManager.NETWORK_TYPE_UMTS || subType == TelephonyManager.NETWORK_TYPE_HSDPA
                    || subType == TelephonyManager.NETWORK_TYPE_EVDO_A || subType == TelephonyManager.NETWORK_TYPE_EVDO_0
                    || subType == TelephonyManager.NETWORK_TYPE_EVDO_B) {
                type = "3g";
            } else if (subType == TelephonyManager.NETWORK_TYPE_LTE) {// LTE是3g到4g的过渡，是3.9G的全球标准
                type = "4g";
            }
        }
        return type;
    }

    public static String getIpStringByint(int ipAddress) {
        String ipString = "";
        if (ipAddress != 0) {
            ipString = ((ipAddress & 0xff) + "." + (ipAddress >> 8 & 0xff) + "."
                    + (ipAddress >> 16 & 0xff) + "." + (ipAddress >> 24 & 0xff));
        }
//        ipString = Formatter.formatIpAddress(ipAddress);
        return ipString;
    }

    /**
     * 6.0以后，获取MAC地址
     *
     * @return
     * @throws SocketException
     */
    public static String getMacAddress() throws SocketException {
        String address = null;
        // 把当前机器上的访问网络接口的存入 Enumeration集合中
        Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
        Log.d("TEST_BUG", " interfaceName = " + interfaces);
        while (interfaces.hasMoreElements()) {
            NetworkInterface netWork = interfaces.nextElement();
            // 如果存在硬件地址并可以使用给定的当前权限访问，则返回该硬件地址（通常是 MAC）。
            byte[] by = netWork.getHardwareAddress();
            if (by == null || by.length == 0) {
                continue;
            }
            StringBuilder builder = new StringBuilder();
            for (byte b : by) {
                builder.append(String.format("%02X:", b));
            }
            if (builder.length() > 0) {
                builder.deleteCharAt(builder.length() - 1);
            }
            String mac = builder.toString();
            Log.d("TEST_BUG", "interfaceName=" + netWork.getName() + ", mac=" + mac);
            // 从路由器上在线设备的MAC地址列表，可以印证设备Wifi的 name 是 wlan0
            if (netWork.getName().equals("wlan0")) {
                Log.d("TEST_BUG", " interfaceName =" + netWork.getName() + ", mac=" + mac);
                address = mac;
            }
        }
        return address;
    }
}