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Diving inside Android Wifi
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Nanik Tolaram
[email protected]
nanikjava
DivingInside Wifi
About
Senior Platform Engineer @ Blocksglobal
Commercial Product screener.digital & lumenhealth.org
Android Writer magazine.odroid.com
Why should I care ?
Battery life
Bandwidth
Responsive apps
Happy User
High Level View
YoutubeGMailWhatsAppFacebookFrameworkWifi Android LayerLinux
KernelWifi Hardware
Inside Framework
WifiService+WifiServiceImplWifiStateMachineWifiNative
com_android_server_wifi_wifinative.cppwifi.c (HAL)wpa_supplicant
daemonWifiTrafficPollerWifiWatchdogStateMachinewpa_supplicant
client libraryLinux Kernel
local socket interface
Java Layer
Native Layer
Youtube
Wifi Issues
Unreliable
Unpredictable
High battery usage
Async architecture
Solution
Use when needed
Batched download
Fixed size download
Push notification download
Android API
JobScheduler + JobInfo
ConnectivityManagerandroid.net.conn.CONNECTIVITY_CHANGE
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