Android 監聽wifi總結

功能實現：控制wifi開關，連上某個特定的wifi。

首先先上個wifi工具類，此類轉載網上一人，出處不明了。 

 

package rodar.rgs.conference.utils;import java.lang.reflect.Constructor;import java.lang.reflect.Field;import java.lang.reflect.InvocationTargetException;import java.net.InetAddress;import java.util.ArrayList;import java.util.List;import android.net.wifi.ScanResult;import android.net.wifi.WifiConfiguration;import android.net.wifi.WifiManager;public class WifiConnect { WifiManager wifiManager;    //定義幾種加密方式，一種是WEP，一種是WPA，還有沒有密碼的情況    public enum WifiCipherType    {    WIFICIPHER_WEP,WIFICIPHER_WPA, WIFICIPHER_NOPASS, WIFICIPHER_INVALID    }//建構函式public WifiConnect(WifiManager wifiManager){  this.wifiManager = wifiManager;}//開啟wifi功能     private boolean OpenWifi()     {     boolean bRet = true;         if (!wifiManager.isWifiEnabled())         {         bRet = wifiManager.setWifiEnabled(true);           }         return bRet;     }    //提供一個外部介面，傳入要串連的無線網     public boolean Connect(String SSID, String Password, WifiCipherType Type)     {        if(!this.OpenWifi())    {     return false;    }        System.out.println(">>>wifiCon=");//開啟wifi功能需要一段時間(我在手機上測試一般需要1-3秒左右)，所以要等到wifi//狀態變成WIFI_STATE_ENABLED的時候才能執行下面的語句        while(wifiManager.getWifiState() == WifiManager.WIFI_STATE_ENABLING )        {         try{     //為了避免程式一直while迴圈，讓它睡個100毫秒在檢測……             Thread.currentThread();  Thread.sleep(100);           }           catch(InterruptedException ie){           }        }           WifiConfiguration wifiConfig = this.CreateWifiInfo(SSID, Password, Type);//    if(wifiConfig == null){           return false;}        WifiConfiguration tempConfig = this.IsExsits(SSID);                if(tempConfig != null)        {        wifiManager.removeNetwork(tempConfig.networkId);        }        //        try {//        //進階選項//        String ip  ="192.168.1.201";//        int networkPrefixLength =24;//        InetAddress intetAddress  = InetAddress.getByName(ip);//        int intIp = inetAddressToInt(intetAddress);  //        String dns = (intIp & 0xFF ) + "." + ((intIp >> 8 ) & 0xFF) + "." + ((intIp >> 16 ) & 0xFF) + ".1";//        setIpAssignment("STATIC", wifiConfig); //"STATIC" or "DHCP" for dynamic setting//        setIpAddress(intetAddress, networkPrefixLength, wifiConfig);//        setGateway(InetAddress.getByName(dns), wifiConfig);//        setDNS(InetAddress.getByName(dns), wifiConfig);//        } catch (Exception e) {//        // TODO: handle exception//        e.printStackTrace();//        }                int netID = wifiManager.addNetwork(wifiConfig);    boolean bRet = wifiManager.enableNetwork(netID, true); //    wifiManager.updateNetwork(wifiConfig);        return bRet;     }         //查看以前是否也配置過這個網路     private WifiConfiguration IsExsits(String SSID)     {     List<WifiConfiguration> existingConfigs = wifiManager.getConfiguredNetworks();        for (WifiConfiguration existingConfig : existingConfigs)         {          if (existingConfig.SSID.equals("\""+SSID+"\""))          {              return existingConfig;          }        }     return null;      }          private WifiConfiguration CreateWifiInfo(String SSID, String Password, WifiCipherType Type)     {     WifiConfiguration config = new WifiConfiguration();         config.allowedAuthAlgorithms.clear();         config.allowedGroupCiphers.clear();         config.allowedKeyManagement.clear();         config.allowedPairwiseCiphers.clear();         config.allowedProtocols.clear();     config.SSID = "\"" + SSID + "\"";       if(Type == WifiCipherType.WIFICIPHER_NOPASS)     {      config.wepKeys[0] = "";      config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);      config.wepTxKeyIndex = 0;     }     if(Type == WifiCipherType.WIFICIPHER_WEP)     {     config.preSharedKey = "\""+Password+"\"";      config.hiddenSSID = true;           config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED);         config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);         config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);         config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);         config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);         config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);         config.wepTxKeyIndex = 0;     }     if(Type == WifiCipherType.WIFICIPHER_WPA)     {     config.preSharedKey = "\""+Password+"\"";     config.hiddenSSID = true;       config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);       config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);                             config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);                             config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);                           //config.allowedProtocols.set(WifiConfiguration.Protocol.WPA);           config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);         config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);      config.status = WifiConfiguration.Status.ENABLED;       }     else     {     return null;     }     return config;     }                              /***      * Convert a IPv4 address from an InetAddress to an integer      * @param inetAddr is an InetAddress corresponding to the IPv4 address      * @return the IP address as an integer in network byte order      */     public static int inetAddressToInt(InetAddress inetAddr)             throws IllegalArgumentException {         byte [] addr = inetAddr.getAddress();         if (addr.length != 4) {             throw new IllegalArgumentException("Not an IPv4 address");         }         return ((addr[3] & 0xff) << 24) | ((addr[2] & 0xff) << 16) |                 ((addr[1] & 0xff) << 8) | (addr[0] & 0xff);     }      public static void setIpAssignment(String assign, WifiConfiguration wifiConf)throws SecurityException, IllegalArgumentException,NoSuchFieldException, IllegalAccessException {setEnumField(wifiConf, assign, "ipAssignment");} 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));}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 DNS1mDnses.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 void editStaticWifiConfig(final ScanResult sr,String pwd, String ip, String gateway,int prefixLength,String dns) throws Exception{        //    WifiConfiguration historyWifiConfig = getHistoryWifiConfig(sr.SSID);//    //    if(historyWifiConfig == null){//    historyWifiConfig = createComWifiConfig(sr.SSID,pwd);//    int netId = mWifiManager.addNetwork(historyWifiConfig);//    mWifiManager.enableNetwork(netId, true);//    }//    //        setIpAssignment("STATIC", historyWifiConfig); //"STATIC" or "DHCP" for dynamic setting//        setIpAddress(InetAddress.getByName(ip), prefixLength, historyWifiConfig);//        setGateway(InetAddress.getByName(gateway), historyWifiConfig);//        setDNS(InetAddress.getByName(dns), historyWifiConfig);//        //        mWifiManager.updateNetwork(historyWifiConfig); //apply the setting//}//    //    public void editDhcpWifiConfig(final ScanResult sr,String pwd) throws Exception{        //    WifiConfiguration historyWifiConfig = getHistoryWifiConfig(sr.SSID);//    //    if(historyWifiConfig == null){//    historyWifiConfig = createComWifiConfig(sr.SSID,pwd);//    int netId = mWifiManager.addNetwork(historyWifiConfig);//    mWifiManager.enableNetwork(netId, true);//    }//    //        setIpAssignment("DHCP", historyWifiConfig); //"STATIC" or "DHCP" for dynamic setting//        //        mWifiManager.updateNetwork(historyWifiConfig); //apply the setting//}}

類中注釋進階選項處，是串連上wifi同時自己設定ip.記得wifiManager.updateNetwork(wifiConfig);

 

類中boolean bRet = wifiManager.enableNetwork(netID, true); 第二個參數true表示如果當前已經有連上一個wifi,要強制連到自己設定的wifi上，此參數必須為true否則連上的還是原來的wifi.

調用此類樣本

 

WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);WifiConnect wifi = new WifiConnect(wifiManager);wifi.Connect("wifiName", "wifipPassword",WifiCipherType.WIFICIPHER_WPA);

需要的許可權

 

 

    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/><uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" /><uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /><uses-permission android:name="android.permission.UPDATE_DEVICE_STATS" /><uses-permission android:name="android.permission.WAKE_LOCK" />

如何在廣播監聽wifi的狀態

 

廣播接收類

 

package rodar.rgs.conference.utils;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.net.NetworkInfo;import android.net.wifi.WifiInfo;import android.net.wifi.WifiManager;import android.os.Bundle;import android.os.Parcelable;import android.util.Log;public class WifiStateReceiver extends BroadcastReceiver{//0 --> WIFI_STATE_DISABLING//1 --> WIFI_STATE_DISABLED//2 --> WIFI_STATE_ENABLING//3 --> WIFI_STATE_ENABLED//4 --> WIFI_STATE_UNKNOWN@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubBundle bundle = intent.getExtras();      int oldInt = bundle.getInt("previous_wifi_state");      int newInt = bundle.getInt("wifi_state");            System.out.println(">>>oldInt="+oldInt+",newInt="+newInt);//      String oldStr = (oldInt>=0 && oldInt<WIFI_STATES.length) ?WIFI_STATES[oldInt] :"?";//      String newStr = (newInt>=0 && oldInt<WIFI_STATES.length) ?WIFI_STATES[newInt] :"?";//      Log.e("", "oldS="+oldStr+", newS="+newStr);//      if(newInt==WifiManager.WIFI_STATE_DISABLED || newInt==WifiManager.WIFI_STATE_ENABLED) {//         onWifiStateChange();  // define this function elsewhere!//      } else if(newInt==WifiManager.WIFI_STATE_DISABLING ||//                newInt==WifiManager.WIFI_STATE_ENABLING)//      {////       chkbox_wifi.setText(newStr);//      } else {//       newStr += " (Is wpa_supplicant.conf readable?)";////       chkbox_wifi.setText(newStr);//      }      WifiManager wifiManager = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);WifiInfo info = wifiManager.getConnectionInfo();System.out.println(">>>onReceive.wifiInfo="+info.toString());System.out.println(">>>onReceive.SSID="+info.getSSID());//if(!info.getSSID().equals("Rodar")){//WifiConnect wifi = new WifiConnect(wifiManager);//wifi.Connect("Rodar", "rodar.5779858",//WifiCipherType.WIFICIPHER_WPA);//System.out.println(">>>onReceive.SSID1="+info.getSSID());//} if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction()))         {             Parcelable parcelableExtra = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);             if (null != parcelableExtra)             {                 NetworkInfo networkInfo = (NetworkInfo) parcelableExtra;                 switch (networkInfo.getState())                 {                 case CONNECTED:                     Log.e("APActivity", "CONNECTED");                     break;                 case CONNECTING:                     Log.e("APActivity", "CONNECTING");                     break;                 case DISCONNECTED:                     Log.e("APActivity", "DISCONNECTED");                     break;                 case DISCONNECTING:                     Log.e("APActivity", "DISCONNECTING");                     break;                 case SUSPENDED:                     Log.e("APActivity", "SUSPENDED");                     break;                 case UNKNOWN:                     Log.e("APActivity", "UNKNOWN");                     break;                 default:                     break;                 }             }         }}//// 顯示Wifi狀態以及ip地址://public static String StringizeIp(int ip) {//  int ip4 = (ip>>24) & 0x000000FF;//  int ip3 = (ip>>16) & 0x000000FF;//  int ip2 = (ip>> 8 )& 0x000000FF;//  int ip1 = ip       & 0x000000FF;//  return Integer.toString(ip1) + "." + ip2 + "." + ip3 + "." + ip4;//}//private void onWifiStateChange() {//         String ip_str = "";//         WifiInfo info = mMainWifi.getConnectionInfo();//         if(info != null) {//          int ipaddr = info.getIpAddress();//          ip_str = " (ip="+StringizeIp(ipaddr)+")";//         }//        //        if(mMainWifi.isWifiEnabled()==true)//               chkbox_wifi.setText("Wifi is on [" + ip_str + "]");//        else//               chkbox_wifi.setText("Wifi is off");//        //}}

註冊和取消廣播一般在onstart和onstop裡

 

 

WifiStateReceiver wifiStateReceiver;@Overrideprotected void onStart() {//註冊網路監聽wifiStateReceiver = new WifiStateReceiver();IntentFilter filter = new IntentFilter();filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);registerReceiver(wifiStateReceiver, filter);super.onStart();}@Overrideprotected void onStop() {//登出網路監聽unregisterReceiver(wifiStateReceiver);super.onStop();}

關於廣播監控wifi開關還是串連狀態可以看這個串連

 

http://www.cnblogs.com/wanghafan/archive/2013/01/10/2855096.html