Android编程实现连接Wifi(运用Wifi 相关 API)

 /*
*  WifiConnect.java
* Author: cscmaker
*/
package com.wifi.connect;
import java.util.List;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.util.Log;
public class WifiConnect {
    WifiManager wifiManager;
    
//定义几种加密方式，一种是WEP，一种是WPA，还有没有密码的情况
    public enum WifiCipherType
    {
     WIFICIPHER_WEP,WIFICIPHER_WPA, WIFICIPHER_NOPASS, WIFICIPHER_INVALID
    }
 
//构造函数
 public WifiConnect(WifiManager wifiManager)
 {
   this.wifiManager = wifiManager;
 }
 
//打开wifi功能
     private boolean OpenWifi()
     {
      boolean bRet = true;
         if (!wifiManager.isWifiEnabled())
         {
          bRet = wifiManager.setWifiEnabled(true);  
         }
         return bRet;
     }
    
//提供一个外部接口，传入要连接的无线网
     public boolean Connect(String SSID, String Password, WifiCipherType Type)
     {
        if(!this.OpenWifi())
     {
       return false;
     }
//开启wifi功能需要一段时间(我在手机上测试一般需要1-3秒左右)，所以要等到wifi
//状态变成WIFI_STATE_ENABLED的时候才能执行下面的语句
        while(wifiManager.getWifiState() == WifiManager.WIFI_STATE_ENABLING )
        {
          try{
     //为了避免程序一直while循环，让它睡个100毫秒在检测……
              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);
        }
        
      int netID = wifiManager.addNetwork(wifiConfig);
     boolean bRet = wifiManager.enableNetwork(netID, false);  
  return bRet;
     }
     
    //查看以前是否也配置过这个网络
     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.status = WifiConfiguration.Status.ENABLED;  
      }
      else
      {
       return null;
      }
      return config;
     }
     
}