power-management

I have a quick question about the accelerometer in Android devices. Is it always on/active? Given that accelerometer is used to detect the orientation of the device, either landscape or portrait. In the official documentation ( SensorManager ) it states that sensors should be turned off to save power. But I wonder if this only applies to others sensors like magnetic field sensors, gyroscope, light sensor and so on. I need to make a case for power conservation and I don't want to make the mistake of saying that the accelerometer can at times be disabled, and instead use it for the purpose of

There is some easily available information on finding the status of a battery, or weather it's charging or not. (GetSystemPowerStatus API or System.Windows.Forms.SystemInformation.PowerStatus). I want to be able to stop a battery from charging based on some criteria, e.g. battery power > 20%. Is there an API to do this? I think it's impossible, because you have need some API for battery or battery charger. And this API can provide to you manufacturer of notebook and battery or battery charger support this. I honestly don't know, but I'd have a look at the APM or ACPI APIs. Other than that, the

I would like to know if my app is running with an external power cable attached. Is it possible to find out this state at runtime? An extra question: would this be able to differentiate between true USB power and those external "battery packs"? Thank you! Use UIDevice property batteryState : [[UIDevice currentDevice] batteryState] == UIDeviceBatteryStateCharging From UIDevice Docs : typedef enum { UIDeviceBatteryStateUnknown, UIDeviceBatteryStateUnplugged, UIDeviceBatteryStateCharging, UIDeviceBatteryStateFull, } UIDeviceBatteryState; As for your 2nd question. I don't believe you can determine

I'm stuck with a little problem here. I want my app to do something, but only when the battery is at 10%. My app doesn't watch the battery level constantly; it just waits for a LOW_BATTERY intent. It works if i don't specify a level, but it works 3 times: 15%, 10%, and 5% I only want it to do something at 10%. Here is my code : public void onReceive(Context context, Intent intent) { if(intent.getAction().equals(ACTION_BATTERY_LOW)) { int level = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1); int scale = intent.getIntExtra(BatteryManager.EXTRA_SCALE, 100); int percent = (level*100)/scale;

in short: i want to intercept suspend/standby messages on my laptop, but my program doesn't receives all relevant messages. background: there's a bug in ms-excel on windows xp/2k, which prevents system suspend if a file is opened on a network/usb drive. i'm trying to work-around it programmatically (my toolbox include python, vb6, or command line tools). i know nothing about windows instrumentation :-) i have a sysinternals utility that suspends the system anyhow. i want to hook it to the close-lid event! in long: The notebook lid close (fujitsu u810) initiate the standby procedure [how?] The

I'd like to keep the screen on whenever one of my Activities are running and the phone is plugged in to a power source. I know that Wakelocks are tricky, so I'm looking for an example or some documentation on how to accomplish this specific goal. hackbod Don't use wake locks for this -- just set and clear the window flag WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON based on whether the device is currently plugged in. You can set the flag with Activity.getWindow().addFlags() . So the code would be getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON); A WakeLock isn't that

I want to ask you If anybody know a simple way to access Mouse and Keyboard battery state in Mac OS. There are some API to access this information? Thanks! For the Keyboard it is: ioreg -n "IOAppleBluetoothHIDDriver" | grep -i "batterypercent" | sed 's/[^[:digit:]]//g' and for the Magic Mouse it is: ioreg -n "BNBMouseDevice" | grep -i "batterypercent" | sed 's/[^[:digit:]]//g' 来源： https://stackoverflow.com/questions/3547797/read-magic-mouse-and-apple-wireless-keyboard-battery-percentage

I'm looking for an automatize way of doing Windows Power Management functions: - Reboot - Shutdown - Hibernate - Sleep - Wakeup Is there a Python module to cover this functionality? Of course any other solutions are also appreciated... I also went with the command line: import os os.system(r'%windir%\system32\rundll32.exe powrprof.dll,SetSuspendState Hibernate') sherpya See win32api.ExitWindowsEx() ActiveState documentation. for flags: http://msdn.microsoft.com/en-us/library/aa376868%28v=vs.85%29.aspx for hybernate/sleep: http://msdn.microsoft.com/en-us/library/aa373201%28v=vs.85%29.aspx to

@Override public void onReceive(Context context, Intent intent) { int status = intent.getIntExtra(BatteryManager.EXTRA_STATUS, BatteryManager.BATTERY_STATUS_UNKNOWN); if (status == BatteryManager.BATTERY_STATUS_CHARGING || status == BatteryManager.BATTERY_STATUS_FULL) Toast.makeText(context, "Charging!", Toast.LENGTH_SHORT).show(); else Toast.makeText(context, "Not Charging!", Toast.LENGTH_SHORT).show(); } Manifest: <receiver android:name=".receiver.BatteryReceiver"> <intent-filter> <action android:name="android.intent.action.ACTION_POWER_CONNECTED"/> <action android:name="android.intent