3 ms·

So what makes this specific to Android phones? Developers can't (get permission to) access this information on other platforms?

• psykovsky 12y ago
  I think it's their research that makes it Android specific, as in, they only researched Android.
• tomkinstinch 12y ago
  It's available on iOS: https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIDevice_Class/#//apple_ref/occ/instp/UIDevice/batteryLevel https://developer.apple.com/library/ios/documentation/UIKit/...
  • feld 12y ago
    No it's not. That does not expose voltage and current. The research paper says they're doing this ... ... by repeatedly reading the following two files: /sys/class/power_supply/battery/voltage_now /sys/class/power_supply/battery/current_now
    • tomkinstinch 12y ago
      Not at a simplistic level, no, but voltage you could derive from the discharge curve of a characterized battery (since we know fraction of charge remaining), and current could probably be approximated by looking at the rate of discharge.