Android系统中对于WIFI的设置集成到了“设置”中，其实跟手动设置差不多。这里介绍下如何手动连接WIFI，以方便以后调试WIFI。
第一步要做的就是要加载WIFI模块驱动了。当然如果你的WIFI是编译到内核里面的，就不需要的。我们的WIFI芯片用的是BCM4330，编译为模块。
insmod /system/lib/modules/kernel/drivers/net/wireless/bcm4330/bcm4330.ko firmware_path=/system/vendor/firmware/bcm4330.bin \ nvram_path=/system/vendor/firmware/nvram.txt
这样驱动模块加载后，需要启动wpa_supplicant
[email protected]:/ # wpa_supplicant -Dwext -iwlan0 -C/data/system/wpa_supplicant -c/data/misc/wifi/wpa_supplicant.conf &
然后ps|grep wpa看看有没有起来，在wifi工作过程中，这个进程要始终都在的。
接着启动客户端wpa_cli进行配置并连接wifi热点
130|[email protected]:/ # wpa_cli -p/data/system/wpa_supplicant -iwlan0
wpa_cli v0.8.x
Copyright (c) 2004-2011, Jouni Malinen <[email protected]> and contributors
This program is free software. You can distribute it and/or modify it
under the terms of the GNU General Public License version 2.
Alternatively, this software may be distributed under the terms of the
BSD license. See README and COPYING for more details.
Interactive mode
>
其中/data/system/wpa_supplicant 是刚刚启动wpa_supplicant的时候创建的一个套接字
接着进行搜索wifi
> scan
OK
<3>CTRL-EVENT-SCAN-RESULTS
查看搜到的有哪些热点
> scan_result
bssid / frequency / signal level / flags / ssid
40:16:9f:67:0f:00 2462 -42 [WPA-PSK-TKIP+CCMP][WPA2-PSK-TKIP+CCMP][WPS][ESS] HHCN-NET
b0:48:7a:49:44:68 2437 -58 [WPA2-PSK-CCMP][WPS][ESS] HHTech.Arch
e0:05:c5:97:d8:5a 2412 -71 [WPA-PSK-CCMP][WPA2-PSK-CCMP-preauth][ESS] 1103-5
40:16:9f:67:0c:a6 2412 -74 [WPA-PSK-TKIP+CCMP][WPA2-PSK-TKIP+CCMP][WPS][ESS] hardware
b0:48:7a:49:65:54 2437 -58 [WPA-PSK-CCMP][WPA2-PSK-CCMP][WPS][ESS] Dept_driver
接着设置wifi，就连接Dept_driver这个热点吧
> add_net
3
> set_net 3 ssid "Dept_driver"
OK
Dept_driver的加密方式是WPA2-PSK
> set_net 3 psk "password"
OK
> select_net 3
OK
<3>CTRL-EVENT-STATE-CHANGE id=0 state=0 BSSID=00:00:00:00:0[ 2752.332061] dhd_aoe_hostip_clr failed code -23
0:00
<3>CTR[ 2752.337768] dhd_aoe_arp_clr failed code 1
L-EVENT-STATE-CHANGE id=-1 state=3 BSSID=00:00:00:00:00:00
<3>CTRL-EVENT-DISCONNECTED bssid=00:00:00:00:00:00 reason=0
<3>CTRL-EVENT-STATE-CHANGE id=-1 state=0 BSSID=00:00:00:00:00:00
<3>CTRL-EVENT-STATE-CHANGE id=-1 state=3 BSSID=00:00:00:00:00:00
<3>CTRL-EVENT-SCAN-RESULTS
<3>WPS-AP-AVAILABLE
<3>Trying to associate with b0:48:7a:49:65:54 (SSID=‘Dept_driver‘ freq=2437 MHz)
<3>CTRL-EVENT-STATE-CHANGE id=-1 state=5 BSSID=b0:48:7a:49:65:54
[ 2753.153717] wl_iw_set_essid: join SSID=Dept_driver ch=6
<3>CTRL-EVENT-STATE-CHANGE id=3 state=6 BSSID=b0:48:7a:49:65:54
<3>Associated with b0:48:7a:49:65:54
<3>CTRL-EVENT-STATE-CHANGE id=3 state=7 BSSID=00:00:00:00:00:00
<3>CTRL-EVENT-STATE-CHANGE id=3 state=8 BSSID=00:00:00:00:00:00
<3>WPA: Key negotiation completed with b0:48:7a:49:65:54 [PTK=CCMP GTK=CCMP]
<3>CTRL-EVENT-CONNECTED - Connection to b0:48:7a:49:65:54 completed (reauth) [id=3 id_str=]
<3>CTRL-EVENT-STATE-CHANGE id=3 state=9 BSSID=00:00:00:00:00:00
> enable_net 3
OK
> q
这样，就都设置好了，接着用dhcpd分配一个IP地址
[email protected]:/ # dhcpcd wlan0
dhcpcd[3940]: version 5.2.10 starting
dhcpcd[3940]: host does not support a monotonic clock - timing can skew
dhcpcd[3940]: wlan0: rebinding lease of 192.168.1.216
dhcpcd[3940]: wlan0: acknowledged 192.168.1.216 from 192.168.1.1 `?‘
dhcpcd[3940]: wlan0: leased 192.168.1.216 for 7200 seconds
dhcpcd[3940]: forked to background, child pid 3971
[email protected]:/ # busybox ifconfig wlan0
wlan0 Link encap:Ethernet HWaddr AC:E8:7B:89:D3:C0
inet addr:192.168.1.216 Bcast:255.255.255.255 Mask:255.255.255.0
inet6 addr: fe80::aee8:7bff:fe89:d3c0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6637 errors:0 dropped:25 overruns:0 frame:0
TX packets:4357 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3825961 (3.6 MiB) TX bytes:704832 (688.3 KiB)
这样就完成了。可以上网了。