Android菜鸟笔记-实现自动连接到指定的WiFi热点

来源：互联网发布：请与网络管理员联系编辑：程序博客网时间：2024/05/06 10:57

好久没写博客了！

实现自动连接到指定的WiFi热点，我们需要熟悉Android里的wifimanager类，下面是结合网络资料和本人实践给出的方法，供参考：

1. 自定义一个wifiAdmin操作类：

import java.util.List;import android.content.Context;import android.net.wifi.ScanResult;import android.net.wifi.WifiConfiguration;import android.net.wifi.WifiInfo;import android.net.wifi.WifiManager;import android.net.wifi.WifiManager.WifiLock;public class WifiAdmin {// 定义WifiManager对象        private WifiManager mWifiManager;       // 定义WifiInfo对象        private WifiInfo mWifiInfo;       // 扫描出的网络连接列表        private List<ScanResult> mWifiList;       // 网络连接列表        private List<WifiConfiguration> mWifiConfiguration;       // 定义一个WifiLock        WifiLock mWifiLock;            // 构造器        public WifiAdmin(Context context) {           // 取得WifiManager对象            mWifiManager = (WifiManager) context                   .getSystemService(Context.WIFI_SERVICE);           // 取得WifiInfo对象            mWifiInfo = mWifiManager.getConnectionInfo();       }          // 打开WIFI        public void openWifi() {           if (!mWifiManager.isWifiEnabled()) {               mWifiManager.setWifiEnabled(true);           }       }          // 关闭WIFI        public void closeWifi() {           if (mWifiManager.isWifiEnabled()) {               mWifiManager.setWifiEnabled(false);           }       }          // 检查当前WIFI状态        public int checkState() {           return mWifiManager.getWifiState();       }          // 锁定WifiLock        public void acquireWifiLock() {           mWifiLock.acquire();       }          // 解锁WifiLock        public void releaseWifiLock() {           // 判断时候锁定            if (mWifiLock.isHeld()) {               mWifiLock.acquire();           }       }          // 创建一个WifiLock        public void creatWifiLock() {           mWifiLock = mWifiManager.createWifiLock("Test");       }          // 得到配置好的网络        public List<WifiConfiguration> getConfiguration() {           return mWifiConfiguration;       }          // 指定配置好的网络进行连接        public void connectConfiguration(int index) {           // 索引大于配置好的网络索引返回            if (index > mWifiConfiguration.size()) {               return;           }           // 连接配置好的指定ID的网络            mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId,                   true);       }          public void startScan() {           mWifiManager.startScan();           // 得到扫描结果            mWifiList = mWifiManager.getScanResults();           // 得到配置好的网络连接            mWifiConfiguration = mWifiManager.getConfiguredNetworks();       }          // 得到网络列表        public List<ScanResult> getWifiList() {           return mWifiList;       }          // 查看扫描结果        public StringBuilder lookUpScan() {           StringBuilder stringBuilder = new StringBuilder();           for (int i = 0; i < mWifiList.size(); i++) {               stringBuilder                       .append("Index_" + new Integer(i + 1).toString() + ":");               // 将ScanResult信息转换成一个字符串包                // 其中把包括：BSSID、SSID、capabilities、frequency、level                stringBuilder.append((mWifiList.get(i)).toString());               stringBuilder.append("/n");           }           return stringBuilder;       }         // 得到MAC地址        public String getMacAddress() {           return (mWifiInfo == null) ? "NULL" : mWifiInfo.getMacAddress();       }          // 得到接入点的BSSID        public String getBSSID() {           return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();       }          // 得到IP地址        public int getIPAddress() {           return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();       }          // 得到连接的ID        public int getNetworkId() {           return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId();       }          // 得到WifiInfo的所有信息包        public String getWifiInfo() {           return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString();       }          // 添加一个网络并连接        public boolean addNetwork(WifiConfiguration wcg) {        int wcgID = mWifiManager.addNetwork(wcg);        boolean b =  mWifiManager.enableNetwork(wcgID, true);        System.out.println("a--" + wcgID);       System.out.println("b--" + b);       return b;    }          // 断开指定ID的网络        public void disconnectWifi(int netId) {           mWifiManager.disableNetwork(netId);           mWifiManager.disconnect();       }      //然后是一个实际应用方法，只验证过没有密码的情况：         public WifiConfiguration CreateWifiInfo(String SSID, String Password, int Type)       {             WifiConfiguration config = new WifiConfiguration();                config.allowedAuthAlgorithms.clear();              config.allowedGroupCiphers.clear();              config.allowedKeyManagement.clear();              config.allowedPairwiseCiphers.clear();              config.allowedProtocols.clear();             config.SSID = "\"" + SSID + "\"";                           WifiConfiguration tempConfig = this.IsExsits(SSID);                       if(tempConfig != null) {                  mWifiManager.removeNetwork(tempConfig.networkId);              }                        if(Type == 1) //WIFICIPHER_NOPASS            {                  config.wepKeys[0] = "";                  config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);                  config.wepTxKeyIndex = 0;             }             if(Type == 2) //WIFICIPHER_WEP            {                 config.hiddenSSID = true;                config.wepKeys[0]= "\""+Password+"\"";                 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 == 3) //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;               }             return config;       }             private WifiConfiguration IsExsits(String SSID)        {            List<WifiConfiguration> existingConfigs = mWifiManager.getConfiguredNetworks();               for (WifiConfiguration existingConfig : existingConfigs)                {                 if (existingConfig.SSID.equals("\""+SSID+"\""))                 {                     return existingConfig;                 }               }            return null;         }      }  //分为三种情况：1没有密码2用wep加密3用wpa加密

2.调用时是这样的：

WifiAdmin wifiAdmin = new WifiAdmin(wifiTest.this);  //wifiTest.this is a context for sample;wifiAdmin.openWifi(); WifiConfiguration wcg=wifiAdmin.CreateWifiInfo(wifiName, wifiPass,3);  //wifiName is the SSID; wifiPass is the password;wifiAdmin.addNetwork(wcg);

3.稍等片刻，便会连接上wifi了

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