Android Wifi开发

添加权限

<!-- 以下是使用wifi访问网络所需的权限 --><uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" /><uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /><uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

获取WifiManager

wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);

然后使用wifiManager就可以来使用Wifi了。具体见这里

使用WifiAdmin工具类进行快捷开发

wifiAdmin工具类对wifiManager进行了封装，可以更方便地进行wifi的开发

public class WifiAdmin {    public WifiManager getWifiManager() {        return mWifiManager;    }    // 定义WifiManager对象    private WifiManager mWifiManager;    // 定义WifiInfo对象    private WifiInfo mWifiInfo;    // 扫描出的网络连接列表    private List<ScanResult> mWifiList;    // 网络连接列表    private List<WifiConfiguration> mWifiConfiguration;    // 定义一个WifiLock    WifiManager.WifiLock mWifiLock;    // 构造器    public WifiAdmin(Context context) {        // 取得WifiManager对象        mWifiManager = (WifiManager) context                .getSystemService(Context.WIFI_SERVICE);        // 取得WifiInfo对象        mWifiInfo = mWifiManager.getConnectionInfo();    }    // 打开WIFI    public void openWifi() {        if (!mWifiManager.isWifiEnabled()) {            mWifiManager.setWifiEnabled(true);        }    }    // 关闭WIFI    public void closeWifi() {        if (mWifiManager.isWifiEnabled()) {            mWifiManager.setWifiEnabled(false);        }    }    // 检查当前WIFI状态    public int checkState() {        return mWifiManager.getWifiState();    }    // 锁定WifiLock    public void acquireWifiLock() {        mWifiLock.acquire();    }    // 解锁WifiLock    public void releaseWifiLock() {        // 判断时候锁定        if (mWifiLock.isHeld()) {            mWifiLock.acquire();        }    }    // 创建一个WifiLock    public void creatWifiLock() {        mWifiLock = mWifiManager.createWifiLock("Test");    }    // 得到配置好的网络    public List<WifiConfiguration> getConfiguration() {        return mWifiConfiguration;    }    // 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);    }    public void startScan() {        mWifiManager.startScan();        // 得到扫描结果        mWifiList = mWifiManager.getScanResults();        // 得到配置好的网络连接        mWifiConfiguration = mWifiManager.getConfiguredNetworks();    }    // 得到网络列表    public List<ScanResult> getWifiList() {        return mWifiList;    }    // 查看扫描结果    public StringBuilder lookUpScan() {        StringBuilder stringBuilder = new StringBuilder();        for (int i = 0; i < mWifiList.size(); i++) {            stringBuilder                    .append("Index_" + new Integer(i + 1).toString() + ":");            // 将ScanResult信息转换成一个字符串包            // 其中把包括：BSSID、SSID、capabilities、frequency、level            stringBuilder.append((mWifiList.get(i)).toString());            stringBuilder.append("/n");        }        return stringBuilder;    }    // 得到MAC地址    public String getMacAddress() {        return (mWifiInfo == null) ? "NULL" : mWifiInfo.getMacAddress();    }    // 得到接入点的BSSID    public String getBSSID() {        return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();    }    // 得到IP地址    public int getIPAddress() {        return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();    }    // 得到连接的ID    public int getNetworkId() {        return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId();    }    // 得到WifiInfo的所有信息包    public String getWifiInfo() {        return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString();    }    // 添加一个网络并连接    public void addNetwork(WifiConfiguration wcg) {        int wcgID = mWifiManager.addNetwork(wcg);        boolean b = mWifiManager.enableNetwork(wcgID, true);        System.out.println("a--" + wcgID);        System.out.println("b--" + b);    }    // 断开指定ID的网络    public void disconnectWifi(int netId) {        mWifiManager.disableNetwork(netId);        mWifiManager.disconnect();    }    //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, //WEP        WIFICIPHER_WPA, //WPA        WIFICIPHER_NOPASS, //没有密码        WIFICIPHER_INVALID //无效的    }    /**     * 创建 一个 WifiConfiguration，之后调用wifiManager.addNetwork保存wifi密码     * @param SSID     * @param password     * @param type     * @return     */    public WifiConfiguration createWifiInfo(String SSID, String password, int type) {        WifiConfiguration config = new WifiConfiguration();        config.allowedAuthAlgorithms.clear();        config.allowedGroupCiphers.clear();        config.allowedKeyManagement.clear();        config.allowedPairwiseCiphers.clear();        config.allowedProtocols.clear();        config.SSID = "\"" + SSID + "\"";        WifiConfiguration tempConfig = this.isExsits(SSID);        if (tempConfig != null) {            mWifiManager.removeNetwork(tempConfig.networkId);        } else {        }        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;    }    private WifiConfiguration isExsits(String SSID) { // 查看以前是否已经配置过该SSID        List<WifiConfiguration> existingConfigs = mWifiManager.getConfiguredNetworks();        for (WifiConfiguration existingConfig : existingConfigs) {            if (existingConfig.SSID.equals("\"" + SSID + "\"")) {                return existingConfig;            }        }        return null;    }}

使用Wifi进行数据传输

使用Wifi进行数据传输其实很简单
服务端这边开启一个wifi热点
然后客户端这边连接到这个热点
然后就组成了一个局域网
然后使用Socket进行通信就可以了 ~

参考

http://www.bkjia.com/Androidjc/1003613.html
http://www.cnblogs.com/pied/p/3767336.html
http://blog.csdn.net/h3c4lenovo/article/details/9627781
http://blog.csdn.net/hudashi/article/details/25283087
http://blog.csdn.net/hudashi/article/details/25284439

Demo

wifi开发示例

Android(安卓)Wifi开发