目前可以使用wireless-tools 或wpa_supplicant工具来配置无线网络。请记住重要的一点是，对无线网络的配置是全局性的，而非针对具体的接口。
wpa_supplicant是一个较好的选择，但缺点是它不支持所有的驱动。请浏览wpa_supplicant网站获得它所支持的驱动列表。另外，wpa_supplicant目前只能连接到那些你已经配置好ESSID的无线网络。wireless-tools支持几乎所有的无线网卡和驱动，但它不能连接到那些只支持WPA的AP。
经过编译后的wpa_supplicant源程序可以看到两个主要的可执行工具：wpa_supplicant和wpa_cli。wpa_supplicant是核心程序，它和wpa_cli的关系就是服务和客户端的关系：后台运行wpa_supplicant，使用wpa_cli来搜索、设置、和连接网络。
如何用wpa_supplicant使能一个wifi连接？
Step by step：
1、运行wpa_supplicant程序；
执行：/system/bin/wpa_supplicant -d -Dwext -iwlan0 -c/data/misc/wifi/wpa_supplicant.conf
其中：
-d ：增加调试信息
-Dwext ：wext，驱动名称
-iwlan0 ：wlan0，网络接口名称
/system/bin/wpa_supplicant ：wpa_supplicant可执行程序path
/data/misc/wifi/wpa_supplicant.conf ：wpa_supplicant的配置文件path
2、运行命令行工具wpa_cli ；
执行 ：wpa_cli -iwlan0 -p/data/system/wpa_supplicant
注，-p/data/system/wpa_supplicant中的wpa_supplicant并不是可执行程序，而是个控制套接字。
此时会进入交互模式。其中交互模式的命令如下表：
| Full command | Short command | Description |
| status | stat | displays the current connection status |
| disconnect | disc | prevents wpa_supplicant from connecting to any access point |
| quit | q | exits wpa_cli |
| terminate | term | kills wpa_supplicant |
| reconfigure | recon | reloads wpa_supplicant with the configuration file supplied (-c parameter) |
| scan | scan | scans for available access points (only scans it, doesn’t display anything) |
| scan_result | scan_r | displays the results of the last scan |
| list_networks | list_n | displays a list of configured networks and their status (active or not, enabled or disabled) |
| select_network | select_n | select a network among those defined to initiate a connection (ie select_network 0) |
| enable_network | enable_n | makes a configured network available for selection (ie enable_network 0) |
| disable_network | disable_n | makes a configured network unavailable for selection (ie disable_network 0) |
| remove_network | remove_n | removes a network and its configuration from the list (ie remove_network 0) |
| add_network | add_n | adds a new network to the list. Its id will be created automatically |
| set_network | set_n | shows a very short list of available options to configure a network when supplied with no parameters.
See next section for a list of extremely useful parameters to be used with set_network and get_network. |
| get_network | get_n | displays the required parameter for the specified network. See next section for a list of parameters |
| save_config | save_c | saves the configuration |
设置网络的基本格式：set_network <network id> <key> <parameter> [<parameter>]
显示网络信息的基本格式：get_network <network id> <key>
相应的参数如下表：
| Key | Description | Parameters |
| ssid | Access point name | string |
| id_str | String identifying the network | string |
| priority | Connection priority over other APs | number (0 being the default low priority) |
| bssid | Mac address of the access point | mac address |
| scan_ssid | Enable/disbale ssid scan | 0, 1, 2 |
| key_mgmt | Type of key management | WPA-PSK, WPA_EAP, None |
| pairwise | Pairwise ciphers for WPA | CCMP, TKIP |
| group=TKIP | Group ciphers for WPA | CCMP, TKIP, WEP104, WEP40 |
| psk | Pre-Shared Key (clear or encrypted) | string |
| wep_key0 | WEP key (up to 4: wep_key[0123]) | string |
| eap | Extensible Authentication Protocol | MD5, MSCHAPV2, OTP, GTC, TLS, PEAP, TTLS |
| identity | EAP identity string | string |
| password | EAP password | string |
| ca_cert | Pathname to CA certificate file | /full/path/to/certificate |
| client_cert | Pathname to client certificate | /full/path/to/certificate (PEM/DER) |
| private_key | Pathname to a client private key file | /full/path/to/private_key (PEM/DER/PFX) |
eg.1、连接无加密的AP
>add_network (It will display a network id for you, assume it returns 0)
>set_network 0 ssid “666″
>set_network 0 key_mgmt NONE
>enable_network 0
>quit
eg.2、连接WEP加密AP
>add_network (assume return 1)
>set_network 1 ssid “666″
>set_network 1 key_mgmt NONE
>set_network 1 wep_key0 “your ap password”
>enable_network 1
eg.3、连接WPA-PSK/WPA2-PSK加密的AP
>add_network (assume return 2)
>set_network 2 ssid “666″
>set_network 2 psk “your pre-shared key”
>enable_network 2
到此，wifi模块就能连接上AP了。
3、以上是通过命令行工具wpa_cli来实现wifi网络的连接。当然，也可以通过wpa_supplicant的配置文件来实现连接。
再回顾下运行wpa_supplicant时执行的命令：
/system/bin/wpa_supplicant -d -Dwext -iwlan0 -c/data/misc/wifi/wpa_supplicant.conf
我们在执行时加上了-c/data/misc/wifi/wpa_supplicant.conf，我们可以将我们要连接的AP的设置以一定的格式写入wpa_supplicant.conf配置文件中即可。
eg.
ctrl_interface=DIR=/data/system/wpa_supplicant GROUP=system update_config=1
network={
ssid=”my access point”
proto=WPA
key_mgmt=WPA-PSK
psk=”you pass words”
}
具体格式可参考：http://hostap./gitweb/gitweb.cgi?p=hostap.git;a=blob_plain;f=wpa_supplicant/wpa_supplicant.conf
转自：http://blog.163.com/wxiongn@126/blog/static/11788203820102262748358/
