1.17android小记

ConnectivityManager mService = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
  EthernetManager mEthManager = (EthernetManager) getSystemService(Context.ETHERNET_SERVICE);
  if(mEthManager.getState() == EthernetManager.ETHERNET_STATE_ENABLED) {
   EthernetDevInfo mInterfaceInfo = mEthManager.getSavedConfig();
   String mIp;
   String mMask;
   String mGw;
   String mDns;
   mIp = "192.168.0.118";
   mMask = "255.255.255.0";
   mGw = "192.168.0.1";
   mDns = "192.168.0.1";
   mInterfaceInfo.setConnectMode(EthernetDevInfo.ETHERNET_CONN_MODE_MANUAL);
   mInterfaceInfo.setIpAddress(mIp);
   mInterfaceInfo.setNetMask(mMask);
   mInterfaceInfo.setDnsAddr(mDns);
   mInterfaceInfo.setGateWay(mGw);
   try{
    mEthManager.updateDevInfo(mInterfaceInfo);
                                Thread.sleep(500);   
   }catch(Exception e){
    e.printStackTrace();
   }
                } else {
   Toast.makeText(this, "Ethernet state disabled!", 5000).show();
                }

测试随便写的，已经验证。大家根据需要自己改吧。（需要源码环境编译）

方法2：

package com.android.jun;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.provider.Settings;
import android.webkit.WebView;
import android.widget.Toast;

public class TextSettingIp extends Activity {
        /** Called when the activity is first created. */
        // 定义侦听端口号
        final int SERVER_PORT = 30000;

        public static void setIpAssignment(String assign, WifiConfiguration wifiConf)
                        throws SecurityException, IllegalArgumentException,
                        NoSuchFieldException, IllegalAccessException {
                setEnumField(wifiConf, assign, "ipAssignment");
        }

        public static void setIpAddress(InetAddress addr, int prefixLength,
                        WifiConfiguration wifiConf) throws SecurityException,
                        IllegalArgumentException, NoSuchFieldException,
                        IllegalAccessException, NoSuchMethodException,
                        ClassNotFoundException, InstantiationException,
                        InvocationTargetException {
                Object linkProperties = getField(wifiConf, "linkProperties");
                if (linkProperties == null)
                        return;
                Class laClass = Class.forName("android.net.LinkAddress");
                Constructor laConstructor = laClass.getConstructor(new Class[] {
                                InetAddress.class, int.class });
                Object linkAddress = laConstructor.newInstance(addr, prefixLength);

                ArrayList mLinkAddresses = (ArrayList) getDeclaredField(linkProperties,
                                "mLinkAddresses");
                mLinkAddresses.clear();
                mLinkAddresses.add(linkAddress);
        }

        public static void setGateway(InetAddress gateway,
                        WifiConfiguration wifiConf) throws SecurityException,
                        IllegalArgumentException, NoSuchFieldException,
                        IllegalAccessException, ClassNotFoundException,
                        NoSuchMethodException, InstantiationException,
                        InvocationTargetException {
                Object linkProperties = getField(wifiConf, "linkProperties");
                if (linkProperties == null)
                        return;
                Class routeInfoClass = Class.forName("android.net.RouteInfo");
                Constructor routeInfoConstructor = routeInfoClass
                                .getConstructor(new Class[] { InetAddress.class });
                Object routeInfo = routeInfoConstructor.newInstance(gateway);

                ArrayList mRoutes = (ArrayList) getDeclaredField(linkProperties,
                                "mRoutes");
                mRoutes.clear();
                mRoutes.add(routeInfo);
        }

        public static void setDNS(InetAddress dns, WifiConfiguration wifiConf)
                        throws SecurityException, IllegalArgumentException,
                        NoSuchFieldException, IllegalAccessException {
                Object linkProperties = getField(wifiConf, "linkProperties");
                if (linkProperties == null)
                        return;

                ArrayList<InetAddress> mDnses = (ArrayList<InetAddress>) getDeclaredField(
                                linkProperties, "mDnses");
                mDnses.clear(); // or add a new dns address , here I just want to
                                                // replace DNS1
                mDnses.add(dns);
        }

        public static Object getField(Object obj, String name)
                        throws SecurityException, NoSuchFieldException,
                        IllegalArgumentException, IllegalAccessException {
                Field f = obj.getClass().getField(name);
                Object out = f.get(obj);
                return out;
        }

        public static Object getDeclaredField(Object obj, String name)
                        throws SecurityException, NoSuchFieldException,
                        IllegalArgumentException, IllegalAccessException {
                Field f = obj.getClass().getDeclaredField(name);
                f.setAccessible(true);
                Object out = f.get(obj);
                return out;
        }

        public static void setEnumField(Object obj, String value, String name)
                        throws SecurityException, NoSuchFieldException,
                        IllegalArgumentException, IllegalAccessException {
                Field f = obj.getClass().getField(name);
                f.set(obj, Enum.valueOf((Class<Enum>) f.getType(), value));
        }

        @Override
        public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.main);
                WifiConfiguration wifiConf = null;
                WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
                WifiInfo connectionInfo = wifiManager.getConnectionInfo();
                List<WifiConfiguration> configuredNetworks = wifiManager
                                .getConfiguredNetworks();
                for (WifiConfiguration conf : configuredNetworks) {
                        if (conf.networkId == connectionInfo.getNetworkId()) {
                                wifiConf = conf;
                                Toast.makeText(this, "11111", 5555).show();
                                break;
                        }
                }

                try {
                        setIpAssignment("STATIC", wifiConf);

                        setIpAddress(InetAddress.getByName("192.168.0.110"), 24, wifiConf);

                        setGateway(InetAddress.getByName("255.255.255.0"), wifiConf);

                        setDNS(InetAddress.getByName("255.255.255.0"), wifiConf);

                } catch (Exception e) {

                        // TODO Auto-generated catch block
                        e.printStackTrace();
                }
                Toast.makeText(this, "1121", 5555).show();
                wifiManager.updateNetwork(wifiConf); // apply the setting

        }
}
需要权限
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" >
    </uses-permission>
    <uses-permission android:name="android.permission.INTERNET" >
    </uses-permission>
    <uses-permission android:name="android.permission.WRITE_SETTINGS" />
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

转载自：

http://www.eoeandroid.com/thread-233453-1-1.html

http://www.eoeandroid.com/thread-248941-1-1.html