设置静态IP需要先忘记WiFi密码再重新连接，会记住是哪个APP连接WiFi

public class WifiConnet {    private static WifiConnet utils = null;    private WifiManager wifiManager;    public static int Num = 0;    public static String SSID = "";    // 构造函数    public static synchronized WifiConnet getIntance() {        if (utils == null){            utils = new WifiConnector();        }        return utils;    }    public void initWifi(WifiManager wifiManager, String ssid, String password, WifiCipherType type,                         String ipAddress, String gateway, String dns, ProgressDialogUtil progress){        LogUtils.printLog("开始连接WiFi");        this.SSID = ssid;        this.wifiManager = wifiManager;        try {            removeWifiBySsid(wifiManager);            Thread.sleep(500);            connect(ssid, password, type, ipAddress, gateway, dns, progress);        }catch (Exception e){            e.printStackTrace();        }    }    /**     * 忘记某一个wifi密码     *     * @param wifiManager     */    public static void removeWifiBySsid(WifiManager wifiManager) {        List wifiConfigs = wifiManager.getConfiguredNetworks();        if (wifiConfigs != null){            for (WifiConfiguration wifiConfig : wifiConfigs) {//            LogUtils.printLog("移除WiFi", wifiConfig.SSID);                if (wifiConfig != null){                    wifiManager.disableNetwork(wifiConfig.networkId);                    wifiManager.disconnect();                    wifiManager.removeNetwork(wifiConfig.networkId);                    wifiManager.saveConfiguration();                }            }        }    }    //WIFICIPHER_WEP是WEP ，WIFICIPHER_WPA是WPA，WIFICIPHER_NOPASS没有密码    public enum WifiCipherType {        WIFICIPHER_WEP, WIFICIPHER_WPA, WIFICIPHER_NOPASS, WIFICIPHER_INVALID    }    Thread thread = null;    // 提供一个外部接口，传入要连接的无线网    public void connect(String ssid, String password, WifiCipherType type,                        String ipAddress, String gateway, String dns, ProgressDialogUtil progress) {        thread = new Thread(new ConnectRunnable(ssid, password, type, ipAddress, gateway, dns, progress));        thread.start();    }    // 查看以前是否也配置过这个网络    private WifiConfiguration isExsits(String SSID) {        List existingConfigs = wifiManager                .getConfiguredNetworks();        if (existingConfigs != null){            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 + "\"";        // nopass        if (Type == WifiCipherType.WIFICIPHER_NOPASS) {            config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);        }        // wep        if (Type == WifiCipherType.WIFICIPHER_WEP) {            if (!TextUtils.isEmpty(Password)) {                if (isHexWepKey(Password)) {                    config.wepKeys[0] = Password;                } else {                    config.wepKeys[0] = "\"" + Password + "\"";                }            }            config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);            config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED);            config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);            config.wepTxKeyIndex = 0;        }        // wpa        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);            // 此处需要修改否则不能自动重联            // 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;    }    // 打开wifi功能    private boolean openWifi() {        boolean bRet = true;        if (!wifiManager.isWifiEnabled()) {            bRet = wifiManager.setWifiEnabled(true);        }        return bRet;    }    class ConnectRunnable implements Runnable {        private String ssid;        private String password;        private WifiCipherType type;        private ProgressDialogUtil progress;        private String ipAddress;        private String gateway;        private String dns;        public ConnectRunnable(String ssid, String password, WifiCipherType type,                               String ipAddress, String gateway, String dns,                               ProgressDialogUtil progress) {            this.ssid = ssid;            this.password = password;            this.type = type;            this.progress = progress;            this.ipAddress = ipAddress;            this.gateway = gateway;            this.dns = dns;        }        @Override        public void run() {            try {                // 打开wifi                openWifi();                Thread.sleep(200);                // 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毫秒检测……                        Thread.sleep(100);                    } catch (InterruptedException ie) {                    }                }                WifiConfiguration wifiConfig = createWifiInfo(ssid, password,                        type);                //                if (wifiConfig == null) {                    return;                }                WifiConfiguration tempConfig = isExsits(ssid);                if (tempConfig != null) {                    wifiManager.removeNetwork(tempConfig.networkId);                }                int netID = wifiManager.addNetwork(wifiConfig);                boolean enabled = wifiManager.enableNetwork(netID, true);                boolean connected = wifiManager.reconnect();                LogUtils.printLog("wifi链接--enabled=" + enabled + "---connected=" + connected);                if (enabled && connected){                    Num = 0;                    Thread.sleep(1000);                    IPUtils.getIntance().connetWifi(wifiManager, wifiConfig, ipAddress, gateway, dns, progress);                }else {                    if (Num < 3){                        Num ++;                        connect(ssid, password, type, ipAddress, gateway, dns, progress);                    }else {                        if (progress != null){                            progress.dismiss();                            LogUtils.printLog("连接WiFi失败");                        }                    }                }            } catch (Exception e) {                if (progress != null){                    progress.dismiss();                }                LogUtils.printLog("连接WiFi失败---Exception--" + e.getMessage());                e.printStackTrace();            }        }    }    private static boolean isHexWepKey(String wepKey) {        final int len = wepKey.length();        // WEP-40, WEP-104, and some vendors using 256-bit WEP (WEP-232?)        if (len != 10 && len != 26 && len != 58) {            return false;        }        return isHex(wepKey);    }    private static boolean isHex(String key) {        for (int i = key.length() - 1; i >= 0; i--) {            final char c = key.charAt(i);            if (!(c >= '0' && c <= '9' || c >= 'A' && c <= 'F' || c >= 'a'                    && c <= 'f')) {                return false;            }        }        return true;    }public void connetWifi(WifiManager mwifiManager, WifiConfiguration mWifiConfiguration, String ipAddress,                           String gateway, String dns, ProgressDialogUtil progress){        try {                setStaticIpConfiguration(mwifiManager, mWifiConfiguration,                        InetAddress.getByName(ipAddress), 24,//IP 网络前缀长度24                        InetAddress.getByName(gateway),//DNS1域名1 gateway                        InetAddress.getAllByName(dns), progress);//网关        } catch (ClassNotFoundException e) {            e.printStackTrace();        } catch (IllegalAccessException e) {            e.printStackTrace();        } catch (InvocationTargetException e) {            e.printStackTrace();        } catch (NoSuchMethodException e) {            e.printStackTrace();        } catch (NoSuchFieldException e) {            e.printStackTrace();        } catch (InstantiationException e) {            e.printStackTrace();        } catch (UnknownHostException e) {            e.printStackTrace();        }    }   public void setStaticIpConfiguration(final WifiManager manager,                                        WifiConfiguration config, InetAddress ipAddress, int prefixLength,                                        InetAddress gateway, InetAddress[] dns, ProgressDialogUtil progress)           throws ClassNotFoundException, IllegalAccessException,           IllegalArgumentException, InvocationTargetException,           NoSuchMethodException, NoSuchFieldException, InstantiationException {       // First set up IpAssignment to STATIC.       Object ipAssignment = getEnumValue(               "android.net.IpConfiguration$IpAssignment", "STATIC");       callMethod(config, "setIpAssignment",               new String[] { "android.net.IpConfiguration$IpAssignment" },               new Object[] { ipAssignment });       // Then set properties in StaticIpConfiguration.       Object staticIpConfig = newInstance("android.net.StaticIpConfiguration");       Object linkAddress = newInstance("android.net.LinkAddress",               new Class[] { InetAddress.class, int.class }, new Object[] {                       ipAddress, prefixLength });       setField(staticIpConfig, "ipAddress", linkAddress);       setField(staticIpConfig, "gateway", gateway);       ArrayList aa = (ArrayList) getField(staticIpConfig,               "dnsServers");       aa.clear();       for (int i = 0; i < dns.length; i++)           aa.add(dns[i]);       callMethod(config, "setStaticIpConfiguration",               new String[] { "android.net.StaticIpConfiguration" },               new Object[] { staticIpConfig });       int updateNetwork = manager.updateNetwork(config);       boolean saveConfiguration = manager.saveConfiguration();       int netId = manager.addNetwork(config);       manager.disableNetwork(netId);       boolean  flag  = manager.enableNetwork(netId, true);       if (flag){           try {               Thread.sleep(3000);           } catch (InterruptedException e) {               e.printStackTrace();           }           LogUtils.printLog("连接WiFi成功");         }else {           isConnetWifi = false;           LogUtils.printLog("连接WiFi失败 --IP不可用");       }   }   private static Object newInstance(String className)           throws ClassNotFoundException, InstantiationException,           IllegalAccessException, NoSuchMethodException,           IllegalArgumentException, InvocationTargetException {       return newInstance(className, new Class[0], new Object[0]);   }   @SuppressWarnings({ "rawtypes", "unchecked" })   private static Object newInstance(String className,                                     Class[] parameterClasses, Object[] parameterValues)           throws NoSuchMethodException, InstantiationException,           IllegalAccessException, IllegalArgumentException,           InvocationTargetException, ClassNotFoundException {       Class clz = Class.forName(className);       Constructor constructor = clz.getConstructor(parameterClasses);       return constructor.newInstance(parameterValues);   }   @SuppressWarnings({ "unchecked", "rawtypes" })   private static Object getEnumValue(String enumClassName, String enumValue)           throws ClassNotFoundException {       Class enumClz = (Class) Class.forName(enumClassName);       return Enum.valueOf(enumClz, enumValue);   }   private static void setField(Object object, String fieldName, Object value)           throws IllegalAccessException, IllegalArgumentException,           NoSuchFieldException {       Field field = object.getClass().getDeclaredField(fieldName);       field.set(object, value);   }   private static Object getField(Object object, String fieldName)           throws IllegalAccessException, IllegalArgumentException,           NoSuchFieldException {       Field field = object.getClass().getDeclaredField(fieldName);       Object out = field.get(object);       return out;   }   @SuppressWarnings("rawtypes")   private static void callMethod(Object object, String methodName,                                  String[] parameterTypes, Object[] parameterValues)           throws ClassNotFoundException, IllegalAccessException,           IllegalArgumentException, InvocationTargetException,           NoSuchMethodException {       Class[] parameterClasses = new Class[parameterTypes.length];       for (int i = 0; i < parameterTypes.length; i++)           parameterClasses[i] = Class.forName(parameterTypes[i]);       Method method = object.getClass().getDeclaredMethod(methodName,               parameterClasses);       method.invoke(object, parameterValues);   }   public String intToIp(int ipAddress) {       return ((ipAddress & 0xff) + "." + (ipAddress >> 8 & 0xff) + "."               + (ipAddress >> 16 & 0xff) + "." + (ipAddress >> 24 & 0xff));   }}                                                                                               







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