但是关于链接加密的wifi现在还没有成功……

首先附上一个工具类，有各种WIFI操作方法：

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 void addNetwork(WifiConfiguration wcg) { 
        int wcgID = mWifiManager.addNetwork(wcg); 
        boolean b =  mWifiManager.enableNetwork(wcgID, true); 
        System.out.println("a--" + wcgID);
        System.out.println("b--" + 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：

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 + "\"";   
          if(Type == Data.WIFICIPHER_NOPASS) 
          { 
               config.wepKeys[0] = ""; 
               config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE); 
               config.wepTxKeyIndex = 0; 
          } 
          if(Type == Data.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 == Data.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;   
          }

return config; 
               }

}

分为三种情况：1没有密码2用wep加密3用wpa加密

WifiManager wifiManager = (WifiManager)getSystemService(Context.WIFI_SERVICE);

boolean bRet1 = wifiManager.setWifiEnabled(true);

//add network

if (wifiManager.startScan()) //扫描可用的无线网络

{

List scanResultList = wifiManager.getScanResults();

for (int i = 0; i < scanResultList.size(); i++)

{

ScanResult scanRet = scanResultList.get(i);

if (scanRet.SSID.equalsIgnoreCase("TEST")) //找到 TEST

{

WifiConfiguration config = new WifiConfiguration();

config.SSID = "\"" + scanRet.SSID + "\"";

config.preSharedKey = "\"password\""; //指定密码

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;

int netID = wifiManager.addNetwork(config);

boolean bRet = wifiManager.enableNetwork(netID, true);

}

}

}

<!-- 以下是使用wifi访问网络所需要的权限-->

android.permission.CHANGE_NETWORK_STATE //修改网络状态的权限

android.permission.CHANGE_WIFI_STATE //修改wifi状态的权限

android.permission.ACCESS_NETWORK_STATE //访问网络权限

android.permission.ACCESS_WIFI_STATE //访问wifi权