Android 在wifi下获取IP和MAC地址

转自 http://www.2cto.com/kf/201207/143403.html

 

Button  

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"/>

//这里是权限

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

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

//接下来就是正文

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 }