Android 在wifi下获取IP和MAC地址

01       android:id="@+id/btn"

03       android:text="获取IP"

04       android:layout_width="fill_parent"

05       android:layout_height="wrap_content"

06       android:onClick="onclick"

07   />

08   <EditText

09       android:id="@+id/ip_txt"

10       android:layout_width="fill_parent"

11       android:layout_height="wrap_content"/>

12

13   <EditText

14       android:id="@+id/mac_txt"

15       android:layout_width="fill_parent"

16       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>

01 package com.wifi;

02

03 import java.net.InetAddress;

04 import java.net.NetworkInterface;

05 import java.net.SocketException;

06 import java.util.Enumeration;

07

08 import android.app.Activity;

09 import android.content.Context;

10 import android.net.wifi.WifiInfo;

11 import android.net.wifi.WifiManager;

12 import android.os.Bundle;

13 import android.util.Log;

14 import android.view.View;

15 import android.widget.Button;

16 import android.widget.EditText;

17 public class MainActivity extends Activity {

18     public static String IP;             //本机IP

19     public static String MAC;            //本机MAC

20

21     Button btn=null;

22     EditText ip_txt=null;

23     EditText mac_txt=null;

24     @Override

25     public void onCreate(Bundle savedInstanceState) {

26         super.onCreate(savedInstanceState);

27         setContentView(R.layout.main);

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

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

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

31

32     }

33     public void onclick(View v){

34         switch (v.getId()) {

35         case R.id.btn:

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

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

38             ip_txt.setText(IP);

39             mac_txt.setText(MAC);

40             break;

41         }

42     }

43

44     public String getLocalIpAddress() {

45         try {

46             for (Enumeration<NetworkInterface> en = NetworkInterface

47                     .getNetworkInterfaces(); en.hasMoreElements();) {

48                 NetworkInterface intf = en.nextElement();

49                 for (Enumeration<InetAddress> enumIpAddr = intf

50                         .getInetAddresses(); enumIpAddr.hasMoreElements();) {

51                     InetAddress inetAddress = enumIpAddr.nextElement();

52                     if (!inetAddress.isLoopbackAddress()) {

53                         return inetAddress.getHostAddress().toString();

54                     }

55                 }

56             }

57         } catch (SocketException ex) {

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

59         }

60         return null;

61     }

62

63     public String getLocalMacAddress() {

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

65         WifiInfo info = wifi.getConnectionInfo();

66         return info.getMacAddress();

67     }

68 }