如何读取android设备的 子网掩码和默认网关

//获取mac地址 public String getLocalMacAddress()      {                               WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);           WifiInfo info = wifi.getConnectionInfo();           return info.getMacAddress();       }      //获取ip地址     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;       }  

如何获取子网掩码和默认网关呢

android.net package中的DdhcpInfo类，存储当前网络状态的状态参数信息，但是返回值是integer 类型，需要自己转换一下

package com.schogini.dhcp;   import android.app.Activity; import android.content.Context; import android.os.Bundle; import android.widget.TextView; import android.net.*; import android.net.wifi.WifiManager;   public class dhcpInfo extends Activity {     public String   s_dns1 ;     public String   s_dns2;          public String   s_gateway;       public String   s_ipAddress;         public String   s_leaseDuration;         public String   s_netmask;       public String   s_serverAddress;     TextView info;     DhcpInfo d;     WifiManager wifii;       /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);         wifii= (WifiManager) getSystemService(Context.WIFI_SERVICE);         d=wifii.getDhcpInfo();           s_dns1="DNS 1: "+String.valueOf(d.dns1);         s_dns2="DNS 2: "+String.valueOf(d.dns2);             s_gateway="Default Gateway: "+String.valueOf(d.gateway);             s_ipAddress="IP Address: "+String.valueOf(d.ipAddress);          s_leaseDuration="Lease Time: "+String.valueOf(d.leaseDuration);              s_netmask="Subnet Mask: "+String.valueOf(d.netmask);             s_serverAddress="Server IP: "+String.valueOf(d.serverAddress);           //dispaly them         info= (TextView) findViewById(R.id.infolbl);         info.setText("Network Info\n"+s_dns1+"\n"+s_dns2+"\n"+s_gateway+"\n"+s_ipAddress+"\n"+s_leaseDuration+"\n"+s_netmask+"\n"+s_serverAddress);     } }

XML/HTML code?<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="      package="com.schogini.dhcp"      android:versionCode="1"      android:versionName="1.0">     <uses-sdk android:minSdkVersion="4" />       <application android:icon="@drawable/icon" android:label="@string/app_name">         <activity android:name=".dhcpInfo"                  android:label="@string/app_name">             <intent-filter>                 <action android:name="android.intent.action.MAIN" />                 <category android:name="android.intent.category.LAUNCHER" />             </intent-filter>         </activity>     </application>     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />   </manifest>