Android Wifi控制方法總結

寫了一個工具類來輔助處理wifi相關狀態控制和連接等功能，參考了網上的相關文件，并修改了里面的一些bug和問題，本文給出的方法均經過驗證可用～

    package com.xys.jrdtraining.network;  

    import java.util.List;  

    import android.content.Context;  
    import android.net.wifi.ScanResult;  
    import android.net.wifi.WifiConfiguration;  
    import android.net.wifi.WifiInfo;  
    import android.net.wifi.WifiManager;  
    import android.net.wifi.WifiManager.WifiLock;  

    /** 
     * wifi ctrl utils class 
     *  
     * @author yisheng.xu 
     *  
     */  
    public class WifiOpenHelper {  
        // 定義WifiManager對象  
        private WifiManager mWifiManager;  
        // 定義WifiInfo對象  
        private WifiInfo mWifiInfo;  
        // 掃描出的網絡連接列表  
        private List<ScanResult> mWifiList;  
        // 網絡連接列表  
        private List<WifiConfiguration> mWifiConfiguration;  
        // 定義一個WifiLock  
        WifiLock mWifiLock;  

        // 構造器  
        public WifiOpenHelper(Context context) {  
            // 取得WifiManager對象  
            mWifiManager = (WifiManager) context  
                    .getSystemService(Context.WIFI_SERVICE);  
            // 取得WifiInfo對象  
            mWifiInfo = mWifiManager.getConnectionInfo();  
        }  

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

        // 斷開當前網絡  
        public void disconnectWifi() {  
            if (!mWifiManager.isWifiEnabled()) {  
                mWifiManager.disconnect();  
            }  
        }  

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

        // 檢查當前WIFI狀態  
        public int checkState() {  
            return mWifiManager.getWifiState();  
        }  

        // 鎖定WifiLock  
        public void acquireWifiLock() {  
            mWifiLock.acquire();  
        }  

        // 解鎖WifiLock  
        public void releaseWifiLock() {  
            // 判斷時候鎖定  
            if (mWifiLock.isHeld()) {  
                mWifiLock.acquire();  
            }  
        }  

        // 創建一個WifiLock  
        public void creatWifiLock() {  
            mWifiLock = mWifiManager.createWifiLock("Test");  
        }  

        // 得到配置好的網絡  
        public List<WifiConfiguration> getConfiguration() {  
            return mWifiConfiguration;  
        }  

        // 指定配置好的網絡進行連接  
        public void connectConfiguration(int index) {  
            // 索引大于配置好的網絡索引返回  
            if (index > mWifiConfiguration.size()) {  
                return;  
            }  
            // 連接配置好的指定ID的網絡  
            mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId,  
                    true);  
        }  

        public void startScan() {  
            mWifiManager.startScan();  
            // 得到掃描結果  
            mWifiList = mWifiManager.getScanResults();  
            // 得到配置好的網絡連接  
            mWifiConfiguration = mWifiManager.getConfiguredNetworks();  
        }  

        // 得到網絡列表  
        public List<ScanResult> getWifiList() {  
            return mWifiList;  
        }  

        // 查看掃描結果  
        public StringBuilder lookUpScan() {  
            StringBuilder stringBuilder = new StringBuilder();  
            for (int i = 0; i < mWifiList.size(); i++) {  
                stringBuilder.append("Index_" + Integer.valueOf(i + 1).toString()  
                        + ":");  
                // 將ScanResult信息轉換成一個字符串包  
                // 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();  
        }  

        // 得到接入點的BSSID  
        public String getBSSID() {  
            return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();  
        }  

        // 得到IP地址  
        public int getIPAddress() {  
            return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();  
        }  

        // 得到連接的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();  
        }  

        // 添加一個網絡并連接  
        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);  
        }  

        // 斷開指定ID的網絡  
        public void disconnectWifi(int netId) {  
            mWifiManager.disableNetwork(netId);  
            mWifiManager.disconnect();  
        }  

        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);  
            }  

            if (Type == 1) // WIFICIPHER_NOPASS  
            {  
                config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);  
            }  
            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.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);  
                config.allowedPairwiseCiphers  
                        .set(WifiConfiguration.PairwiseCipher.CCMP);  
                config.status = WifiConfiguration.Status.ENABLED;  
            }  
            return config;  
        }  

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