WIFI模知识块的

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获取WifiManagerWifiManager wm = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);设置wifi功能开启bRet = wifiManager.isWifiEnabled();//判断是否开启bRet = wifiManager.setWifiEnabled(true);//设置开启关闭注意，调用setWifiEnabled后，系统进行wifi模块的开启需要一定时间，此时通过wifiManager.getWifiState()获取的状态来判断是否完成。WifiManager.WIFI_STATE_DISABLED : WIFI网卡不可用（1）WifiManager.WIFI_STATE_DISABLING : WIFI网卡正在关闭（0）WifiManager.WIFI_STATE_ENABLED : WIFI网卡可用（3）WifiManager.WIFI_STATE_ENABLING : WIFI网正在打开（2） （WIFI启动需要一段时间）WifiManager.WIFI_STATE_UNKNOWN  : 未知网卡状态while (wifiManager.getWifiState() == WifiManager.WIFI_STATE_ENABLING) {try {Thread.currentThread();Thread.sleep(100);} catch (InterruptedException ie) {}}扫描附近接入点APList list = null;if ( wifiManager.startScan())list = wifiManager.getScanResults();获取AP的信号强度、频率等scanResult.level  //信号强度scanResult.frequency  //频率获取手机中保存过配置的连接信息List existingConfigs = wifiManager.getConfiguredNetworks();//获取保存的配置信息判断某ssid的AP是否有保存过配置信息for (WifiConfiguration existingConfig : existingConfigs) {if (existingConfig.SSID.equals("\"" + SSID + "\"")) {return existingConfig;}}关闭Wifi连接wifiManager.disableNetwork(existingConfig.networkId);移除Wifi连接配置wifiManager.removeNetwork(networkId);注意与上面的disableNetwork的区别。Disable只是单纯的断开连接，保存的ssid和密码并不清除。Remove则是从手机中移除（忘记）该连接配置，用来清除保存的密码在网络正常连接的状态，也可直接调用remove来代替disable中断网络，但会清除密码信息。创建连接Configurationpublic WifiConfiguration CreateWifiConfig(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 + "\"";//无密码if (Type == WifiCipherType.WIFICIPHER_NOPASS) {config.wepKeys[0] = "";config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);config.wepTxKeyIndex = 0;}//WEP加密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;}//WPA加密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.status = WifiConfiguration.Status.ENABLED;}else {return null;}return config;}添加、开启一个wifipublic boolean addNewWifi(WifiConfiguration newConfig){int netID = wifiManager.addNetwork(newConfig);//添加boolean bRet = wifiManager.enableNetwork(netID, false);//启动return bRet;}获取目前的WifiInfo（IP、mac等）WifiInfo wInfo = wifiManager.getConnectionInfo();//获取当前连接的infowInfo.getBSSID();// 获取BSSIDwInfo.getHiddenSSID();// 获得SSID 是否被隐藏wInfo.getIpAddress();// 获取IP 地址wInfo.getLinkSpeed();// 获得连接的速度wInfo.getMacAddress();// 获得Mac 地址wInfo.getRssi();// 获得802.11n 网络的信号wInfo.getSSID();// 获得SSIDSupplicantState suppState = wInfo.getSupplicantState();// 返回具体客户端状态的信息wInfo.getDetailedStateOf(suppState);// 获取客户端的连通性相关权限修改网络状态的权限修改WIFI状态的权限访问网络权限访问WIFI权限