Android之Wifi模块开发

接口简介

因为项目需要，所以完成了一个简单的wifi模块，主要实现了打开wifi、获取网络列表、连接有密码或者无密码的网络等等，android为wifi操作提供了很多接口，在此简单总结一下所用的类和代码中使用的主要的方法（英语渣渣自己翻译的API，凑合看看吧）。

1、 ScanResult
主要用来描述已检测出来的接入点。

2、WifiInfo
连接的wifi信息描述。

3、WifiConfiguration
代表配置好的wifi，包括安全验证。
wifi有三种安全模式：无密码、WEP和WPA三种（简单了解可达链接 wifi三种安全模式），设置均不一样，具体在代码中createWifiInfo方法实现。

3、WifiManage

开发实例

下面提供一个功能较为完善的wifi开发例子：
下载地址为 http://download.csdn.net/detail/u010738604/9050129
演示效果：

我将判断以及连接wifi的各种方法操作均封装在了WifiAdmin类中，关键代码如下：

public class WifiAdmin {
    // 定义WifiManager对象
        public WifiManager mWifiManager;
        // 定义WifiInfo对象
        public WifiInfo mWifiInfo;
        // 扫描出的网络连接列表
        public List<ScanResult> mWifiList;
        // 网络连接列表
        public List<WifiConfiguration> mWifiConfiguration;
        // 定义一个WifiLock
        WifiLock mWifiLock;

        public WifiAdmin(Context context){
            mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
            System.out.println("mWifiManager="+mWifiManager);
            // 取得WifiInfo对象
            mWifiInfo = mWifiManager.getConnectionInfo();
        }

        public WifiConfiguration checkWiFiConfig(String str) {
            for (WifiConfiguration C : mWifiConfiguration) {
                if (C.SSID.equals(""" +str+ """)) {
                    return C;
                }
            }
            return null;
        }

        public void getWifiList() {
            // mWifiManager.;
            mWifiManager.startScan();
            // 得到扫描结果
            mWifiList = mWifiManager.getScanResults();
            System.out.println("mWifiList="+mWifiList);
            // 得到配置好的网络连接
            mWifiConfiguration = mWifiManager.getConfiguredNetworks();
        }

        // 打开WIFI
        public void openWifi() {
            if (!mWifiManager.isWifiEnabled()) {
                mWifiManager.setWifiEnabled(true);
            }
        }

        // 得到WifiInfo的所有信息包
        public String getWifiInfo() {
            return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString();
        }

        // 关闭WIFI
        public void closeWifi() {
            if (mWifiManager.isWifiEnabled()) {
                mWifiManager.setWifiEnabled(false);
            }
        }

        // 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);
        }

        // 检查当前WIFI状态
        public int checkState() {
            return mWifiManager.getWifiState();
        }

        public WifiConfiguration IsExsits(String SSID) {
            List<WifiConfiguration> existingConfigs = mWifiManager
                    .getConfiguredNetworks();
            for (WifiConfiguration existingConfig : existingConfigs) {
                if (existingConfig.SSID.equals(""" + SSID + """)) {
                    return existingConfig;
                }
            }
            return null;
        }

        //验证wifi密码，如果成功则返回一个配置好的WIFI信息
        public WifiConfiguration createWifiInfo(String SSID, String Password,
                int Type) {
            //Log.v(TAG, "SSID = " + SSID + "## Password = " + Password + "## Type = " + Type);
            System.out.println("SSID = " + SSID + "## Password = " + Password + "## Type = " + Type);
            if (SSID == null || Password == null || SSID.equals("")) {
                //Log.e(TAG, "addNetwork() ## nullpointer error!");
                System.out.println("addNetwork() ## nullpointer error!");
                return null;
            }
            WifiConfiguration config = new WifiConfiguration();
            config.allowedAuthAlgorithms.clear();
            config.allowedGroupCiphers.clear();
            config.allowedKeyManagement.clear();
            config.allowedPairwiseCiphers.clear();
            config.allowedProtocols.clear();
            config.SSID = """ + SSID + """;

            WifiConfiguration tempConfig = isExsits(SSID, mWifiManager);
            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;
        }

        /**
         * 判断wifi是否存在
         * 
         * @param SSID
         * @param wifiManager
         * @return
         */
        public static WifiConfiguration isExsits(String SSID,
                WifiManager wifiManager) {
            List<WifiConfiguration> existingConfigs = wifiManager
                    .getConfiguredNetworks();
            for (WifiConfiguration existingConfig : existingConfigs) {
                if (existingConfig.SSID.equals(""" + SSID + """)) {
                    return existingConfig;
                }
            }
            return null;
        }

        public boolean ifConfigured(String ssid, WifiManager mWifiManager2) {
            // TODO Auto-generated method stub
            if(isExsits(ssid, mWifiManager2) != null)
                return true;
            return false;
        }

}

最后

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