WIFI模知识块的
获取WifiManager
WifiManager wm = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
设置wifi功能开启
bRet = wifiManager.isWifiEnabled();//判断是否开启
bRet = wifiManager.setWifiEnabled(true);//设置开启关闭
注意，调用setWifiEnabled后，系统进行wifi模块的开启需要一定时间，此时通过wifiManager.getWifiState()获取的状态来判断是否完成。
WifiManager.WIFI_STATE_DISABLED : WIFI网卡不可用（1）
WifiManager.WIFI_STATE_DISABLING : WIFI网卡正在关闭（0）
WifiManager.WIFI_STATE_ENABLED : WIFI网卡可用（3）
WifiManager.WIFI_STATE_ENABLING : WIFI网正在打开（2） （WIFI启动需要一段时间）
WifiManager.WIFI_STATE_UNKNOWN : 未知网卡状态
while (wifiManager.getWifiState() == WifiManager.WIFI_STATE_ENABLING) {
try {
Thread.currentThread();
Thread.sleep(100);
} catch (InterruptedException ie) {
}
}
扫描附近接入点AP
List list = null;
if ( wifiManager.startScan())
list = wifiManager.getScanResults();
获取AP的信号强度、频率等
scanResult.level //信号强度
scanResult.frequency //频率
获取手机中保存过配置的连接信息
List existingConfigs = wifiManager.getConfiguredNetworks();//获取保存的配置信息
判断某ssid的AP是否有保存过配置信息
for (WifiConfiguration existingConfig : existingConfigs) {
if (existingConfig.SSID.equals("\"" + SSID + "\"")) {
return existingConfig;
}
}
关闭Wifi连接
wifiManager.disableNetwork(existingConfig.networkId);
移除Wifi连接配置
wifiManager.removeNetwork(networkId);
注意与上面的disableNetwork的区别。Disable只是单纯的断开连接，保存的ssid和密码并不清除。
Remove则是从手机中移除（忘记）该连接配置，用来清除保存的密码
在网络正常连接的状态，也可直接调用remove来代替disable中断网络，但会清除密码信息。
创建连接Configuration
public WifiConfiguration CreateWifiConfig(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 + "\"";
//无密码
if (Type == WifiCipherType.WIFICIPHER_NOPASS) {
config.wepKeys[0] = "";
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
config.wepTxKeyIndex = 0;
}
//WEP加密
if (Type == WifiCipherType.WIFICIPHER_WEP) {
config.preSharedKey = "\"" + Password + "\"";
config.hiddenSSID = true;
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;
}
//WPA加密
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);
// config.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
// config.status = WifiConfiguration.Status.ENABLED;
}
else {
return null;
}
return config;
}
添加、开启一个wifi
public boolean addNewWifi(WifiConfiguration newConfig){
int netID = wifiManager.addNetwork(newConfig);//添加
boolean bRet = wifiManager.enableNetwork(netID, false);//启动
return bRet;
}
获取目前的WifiInfo（IP、mac等）
WifiInfo wInfo = wifiManager.getConnectionInfo();//获取当前连接的info
wInfo.getBSSID();// 获取BSSID
wInfo.getHiddenSSID();// 获得SSID 是否被隐藏
wInfo.getIpAddress();// 获取IP 地址
wInfo.getLinkSpeed();// 获得连接的速度
wInfo.getMacAddress();// 获得Mac 地址
wInfo.getRssi();// 获得802.11n 网络的信号
wInfo.getSSID();// 获得SSID
SupplicantState suppState = wInfo.getSupplicantState();// 返回具体客户端状态的信息
wInfo.getDetailedStateOf(suppState);// 获取客户端的连通性
相关权限
修改网络状态的权限
修改WIFI状态的权限
访问网络权限
访问WIFI权限
