android 实现指定wifi切换

android 实现指定wifi切换 ,网上找了很多代码都有问题，借鉴其他人的整理了一份。

操作过程中发现始终切换失败，最终发现是密码问题。所连接设备虽然不需要密码，但这里连接时需要指定一个空密码

使用办法：

wifiUtils = new WifiUtils(CurrentStatusActivity.this);boolean isEnable = wifiUtils.isEnable();if (isEnable) {// wifi已经打开if (dialog != null) {

//关闭加载窗口dialog.dismiss();}// 是否已经连接上了 指定前缀的wifiif (wifiUtils.getSSID().contains(WifiUtils.wifi_ssid_suffix)) {//进行操作

} else {// 1: 判断当前网络中有几个指定前缀的ssidList exsits = wifiUtils.getExistZXwifi();if (exsits.size() == 0) {//当前网络中没有指定wifi} else if (exsits.size() == 1) {

//正确逻辑，写自己的的逻辑代码} else {

//当前网络中有多个指定前缀ssid的 wifi ，提示框 提示用户选择。

wifi_dialog = new WifiSwitchDialog(this, exsits);wifi_dialog.show();}}} else {// wifi 未打开// 网络不可用,打开网络设置页面dialog = new NetSetingDialog(this);dialog.show();}

import java.util.ArrayList;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 操作 *  * @author java_developer *  */public class WifiUtils {public static String wifi_ssid_suffix = "Tp-link";// 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 mWifiList;// 定义一个WifiLockWifiLock mWifiLock;// 构造器public WifiUtils(Context context) {// 取得WifiManager对象mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);// 取得WifiInfo对象mWifiInfo = mWifiManager.getConnectionInfo();}// 打开WIFIpublic boolean openWifi() {if (!mWifiManager.isWifiEnabled()) {return mWifiManager.setWifiEnabled(true);} else {return true;}}// 关闭WIFIpublic void closeWifi() {if (mWifiManager.isWifiEnabled()) {mWifiManager.setWifiEnabled(false);}}public boolean isEnable() {return mWifiManager.isWifiEnabled();}// 检查当前WIFI状态public int checkState() {return mWifiManager.getWifiState();}// 锁定WifiLockpublic void acquireWifiLock() {mWifiLock.acquire();}// 解锁WifiLockpublic void releaseWifiLock() {// 判断时候锁定if (mWifiLock.isHeld()) {mWifiLock.acquire();}}// 创建一个WifiLockpublic void creatWifiLock() {mWifiLock = mWifiManager.createWifiLock("Test");}// 得到配置好的网络public List 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);}// 得到网络列表public List 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、levelstringBuilder.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BSSIDpublic String getBSSID() {return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();}public String getSSID() {return (mWifiInfo == null) ? "NULL" : mWifiInfo.getSSID();}// 得到IP地址public int getIPAddress() {return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();}// 得到连接的IDpublic 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();}/** * 简介：wifi结合 *  */public int switchWifi(String wifi_ssid) {String ssid = this.getSSID();ssid = ssid.replace("\"", "");if (ssid.contains(wifi_ssid)) {// wifi已经加入相应wifi无需进行切换// ping 是否通boolean ping = new Tools().ping("2");if (ping) {return 0;} else {// 虽然加入了网络，但是网络不通return 4;}} else {// 首先判断当前wifi列表中是否有zx_wifrWifiConfiguration tempConfig = this.IsExsits(wifi_ssid);if (tempConfig != null) {mWifiManager.removeNetwork(tempConfig.networkId);}// 进行切换WifiConfiguration wcg = this.createWifiInfo(wifi_ssid,"", 1);boolean success = this.addNetwork(wcg);if (success) {return 1;} else {return 2;}}}// 添加一个网络并连接public boolean addNetwork(WifiConfiguration wcg) {int wcgID = mWifiManager.addNetwork(wcg);// 执行命令去连接boolean b = mWifiManager.enableNetwork(wcgID, true);mWifiManager.saveConfiguration();return b;}// 断开指定ID的网络public void disconnectWifi(int netId) {mWifiManager.disableNetwork(netId);mWifiManager.disconnect();}// 然后是一个实际应用方法，只验证过没有密码的情况：/** * 第一参数是SSID的名称；第二个参数是指定SSID网络的密码，当不需要密码是置空（”“）；第三个参数是热点类型：1-无密码 / * 2-WEP密码验证（未测试）/ 3-WAP或WAP2 PSK密码验证。 *  * @param SSID * @param Password * @param Type * @return */public WifiConfiguration createWifiInfo(String wifi_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 = "\"" + wifi_ssid + "\"";if (Type == 1) {// WIFICIPHER_NOPASSconfig.wepKeys[0] = "\"" + Password + "\"";config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);config.wepTxKeyIndex = 0;}if (Type == 2) {// WIFICIPHER_WEPconfig.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_WPAconfig.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;}// 网络连接列表private List mWifiConfiguration;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();}public List getExistZXwifi() {List wifis = new ArrayList();List mWifiList = mWifiManager.getScanResults();for (int i = 0; i < mWifiList.size(); i++) {ScanResult sr = mWifiList.get(i);String s_ssid = sr.SSID;if (s_ssid.contains(wifi_ssid_suffix)) {wifis.add(s_ssid);}}return wifis;}private WifiConfiguration IsExsits(String SSID) {if (mWifiManager == null) {return null;} else {List existingConfigs = mWifiManager.getConfiguredNetworks();for (int i = 0; i < existingConfigs.size(); i++) {WifiConfiguration existingConfig = existingConfigs.get(i);String c_ssid = existingConfig.SSID;if (c_ssid.contains(SSID)) {return existingConfig;}}}return null;}}

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