Hi,I tried to write a little android application to be able to monitor the charge from usb for my Freerunner (to use a car charger...)
I do not think that in current version there is a way via android API (?) -> I tried to directly issue : echo 500 > /sys/class/i2c-adapter/i2c-0/0-0073/pcf50633-mbc/force_usb_limit_dangerous This works via adb shell, when connected to my PC (and charging icon in android goes away when switching to 100mA, comes back when 500mA) In my application, I used Runtime.getRuntime().exec() to try to do the same. This way, reading current values works, so I can successfully exec : cat /sys/class/i2c-adapter/i2c-0/0-0073/pcf50633-mbc/usb_curlim cat /sys/class/power_supply/battery/current_now But trying to change usb charge via exec(sh -c "echo 500 > /sys/class/i2c-adapter/i2c-0/0-0073/pcf50633-mbc/force_usb_limit_dangerous") fails : "permission denied" (this is the error I get in the shell process) Is there a way to get this to work ? Can my application request permissions that will allow it do do this ? Or maybe via another method, like JNI ? (but this should not grant more rights ?)
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