android程序获取WIFI的IP地址和MAC地址

转自：http://my.oschina.net/chenj/blog/68680

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，添加为AndroidManifest.xml的<manifest>的子节点

<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（注意IPV4与IPV6的区别，见注释）

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IPpublic static String MAC;            //本机MAC
    Button btn=null;EditText ip_txt=null;EditText mac_txt=null;@Overridepublic 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IPMAC = 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 Inet6Addressreturn 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();}
}

另一种方法：

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 );
}