安卓连接指定wifi

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, true);
        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;
            return config;
        }
        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;
            return config;
        }
        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;
    }

    public String getWifiSSID() {
        String wifiId = null;
        if (wifiManager != null) {
            WifiInfo info = wifiManager.getConnectionInfo();
            wifiId = info != null ? info.getSSID() : null;
        }
        return wifiId;
    }

}