Android获取本机IP地址（不是localhost）和MAC的方法

这个方法在摩托罗拉里程碑上测试通过。功能是获取本机的IP和MAC地址。首先新建一个工程，修改AndroidManifest.xml文件增加用户权限，如下。

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

然后修改/res/layout/main.xml，如下。

<TextView  
    android:id ="@+id/hello"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content"
    />

主要代码如下（GetIPMAC.java）：

package exp.getipmac;
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.widget.TextView;
public class GetIPMAC extends Activity {
	public static String hostip;             //本机IP
	public static String hostmac;            //本机MAC
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        TextView tv= (TextView)findViewById(R.id.hello);
        
        hostip = getLocalIpAddress();  //获取本机IP
        hostmac = getLocalMacAddress();//获取本机MAC
        /* 显示本机IP和MAC */
        tv.setText("HostIP:" + hostip + "/nHostMAC:" + hostmac);
        /* 在调试信息中输出本机IP和MAC */
        if (hostip != null) Log.d("GetIPMAC", hostip);
        else Log.d("GetIPMAC", "null");
        Log.d("GetIPMAC", hostmac);
    }
    
    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();
	}
}

运行效果：