Android 在wifi下获取IP和MAC地址

近日在鼓捣这玩意，拿出来大家分享一下，代码比较简单，如果有不懂的再问

  <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"/>

//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

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()) {
						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();
	}
}