采用的是 RTL8188 芯片
现象：
驱动正常，手动可以连接网络并分配ip， 但是通过系统设置页面，dhcp会失败。
getprop | grep dhcp
[dhcp.wlan0.dns1]: [192.168.9.3]
[dhcp.wlan0.dns2]: []
[dhcp.wlan0.dns3]: []
[dhcp.wlan0.dns4]: []
[dhcp.wlan0.domain]: []
[dhcp.wlan0.gateway]: [192.168.112.1]
[dhcp.wlan0.ipaddress]: [192.168.114.31]
[dhcp.wlan0.leasetime]: [3600]
[dhcp.wlan0.mask]: [255.255.252.0]
[dhcp.wlan0.mtu]: []
[dhcp.wlan0.pid]: [2426]
[dhcp.wlan0.reason]: [REBOOT]
[dhcp.wlan0.result]: [failed]
[dhcp.wlan0.server]: [192.168.112.1]
[dhcp.wlan0.vendorInfo]: []
[init.svc.dhcpcd_eth0]: [stopped]
[init.svc.dhcpcd_wlan0]: [stopped]
参考
https://blog.csdn.net/kangear/article/details/80289519
手动开启方式
start wpa_supplicant
dhcpcd wlan0
可以分配成功
wpa_cli -iwlan0 -g@android:wpa_wlan0 可以与之交互
dhcp相关文章
http://lishiwen4.github.io/android/android-dhcp-and-dns
可能解决方法：
https://www.cnblogs.com/zzb-Dream-90Time/p/8244566.html
最终解决：
发现logcat中，一条关键的信息 handleBadNetworkDisconnectReport 。
E/WifiConfigStore( 456): handleBadNetworkDisconnectReport (+8) 0 SSID: Starnet-Office, BSSID: 06:69:6c:41:83:69, MAC: 60:23:a4:e3:c0:2f, Supplicant state: COMPLETED, RSSI: -48, Link speed: 72Mbps, Frequency: 2412MHz, Net ID: 0, Metered hint: false, score: 60
E/WifiStateMachine( 456): transitionTo: destState=DisconnectingState
google搜索，这个文章说了，以太网连接时候优先级更高，会断开wifi。。。。
https://blog.csdn.net/u013686019/article/details/51447129
把网线拔了，发现认证连接就正常了。