android Wifi自动连接

通过程序来实现wifi的自动连接。

这两天对android的wifi功能研究了一下。下面共享出自己封装的WifiConnect类。（这里参考了ZXing开源项目中wifi模块）

首先，要了解android关于wifi的API.

如果你喜欢看English API，这是android关于wifi的API地址：

http://developer.android.com/reference/android/net/wifi/package-summary.html（配置Wifi，还需要设定权限，android中关于wifi的API文档中说明了要添加什么权限）

如果你一看英语就头疼，这里有关于wifi的api的中文解释

http://note.sdo.com/u/1500295617/n/prb71~jGAHfpnM0l000bgN

切入正题,这里贴出一个封装了的类(WifiConnect)，在实例化WifiConnect对象时，需要传入一个WifiManager对象。WifiConnect类向外部提供一个Connect方法，参数是无线的SSID，password，还有加密类型。

/* *  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 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;     }     }

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