<Button

       android:id="@+id/btn"

       android:text="获取IP"

       android:layout_width="fill_parent"

       android:layout_height="wrap_content"

       android:onClick="onclick"

   />

   <EditText

       android:id="@+id/ip_txt"

       android:layout_width="fill_parent"

       android:layout_height="wrap_content"/>

<EditText

       android:id="@+id/mac_txt"

       android:layout_width="fill_parent"

       android:layout_height="wrap_content"/>

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

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

package com.wifi;

import java.net.InetAddress;

import java.net.NetworkInterface;

import java.net.SocketException;

import java.util.Enumeration;

import android.app.Activity;

import android.content.Context;

import android.net.wifi.WifiInfo;

import android.net.wifi.WifiManager;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

public class MainActivity extends Activity {

    public static String IP;             //本机IP

    public static String MAC;            //本机MAC

    Button btn=null;

    EditText ip_txt=null;

    EditText mac_txt=null;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        btn=(Button)findViewById(R.id.btn);

        ip_txt=(EditText)findViewById(R.id.ip_txt);

        mac_txt=(EditText)findViewById(R.id.mac_txt);

    }

    public void onclick(View v){

        switch (v.getId()) {

        case R.id.btn:

            IP = getLocalIpAddress();  //获取本机IP

            MAC = getLocalMacAddress();//获取本机MAC

            ip_txt.setText(IP);

            mac_txt.setText(MAC);

            break;

        }

    }

    public String getLocalIpAddress() {

        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)) { // 这是只获取IPV4的，如果要获取IPV6的，改成instanceof Inet6Address

                        return inetAddress.getHostAddress().toString();

                    }

                }

            }

        } catch (SocketException ex) {

            Log.e("WifiPreference IpAddress", ex.toString());

        }

        return null;

    }

    public String getLocalMacAddress() {

        WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);

        WifiInfo info = wifi.getConnectionInfo();

        return info.getMacAddress();

    }

}

WifiManager wifi_service = (WifiManager)getSystemService(WIFI_SERVICE);

//检查wifi是否开启  

if(!wifimanage.isWifiEnabled())  {  

　　wifimanage.setWifiEnabled(true);  

}  

WifiInfo wifiinfo= wifimanage.getConnectionInfo();  

String ip=intToIp(wifiinfo.getIpAddress());  

//将获取的int转为真正的ip地址,参考的网上的，修改了下  

private String intToIp(int i)  {

　　return (i & 0xFF)+ "." + ((i >> 8 ) & 0xFF)? + "." + ((i >> 16 ) & 0xFF) +"."+((i >> 24 ) & 0xFF );

}