sleep-mode

I want to send device to sleep or turn the screen off. I have investigated and found this topic: Turn off screen on Android Basically, the are three ways to do it, but I have found problems for the three: a) Choice 1: PowerManager manager = (PowerManager) getSystemService(Context.POWER_SERVICE); manager.goToSleep(int amountOfTime); Problem: It causes FC. I have read I need DEVICE_POWER permissions, but it can't be granted for normal apps. b) Choice 2: PowerManager manager = (PowerManager) getSystemService(Context.POWER_SERVICE); PowerManager.WakeLock wl = manager.newWakeLock(PowerManager

So apparently it is possible to keep the processor going processing stuff while the screen is locked, as indicated here: Running IPhone apps while in sleep mode However, after testing with the example code, UIAccelerometer will just stop giving value as soon as the device is locked pronto. Is there a way to force otherwise? There was a bug in iPhone OS prior to 3.1.2 that caused the accelerometer to stop returning values as soon as the screen was blanked. You may be running into this same issue. I filed a bug with Apple about it and they fixed it in 3.1.2. One trick I use in an app is to

I want to take pictures from the Android device's camera periodically over a matter of hours, to create a time lapse video effect. I set an Alarm Manager with an AlarmManager.RTC_WAKEUP flag set to start up a service every few minutes. The service holds a partial wakelock, does some work, and then calls a Broadcast Receiver through the Alarm Manager which starts up an Activity. The activity is created (or is resumed), turns on it's own wakelock, and sets up the camera preview surface. Once the surface is setup the SurfaceHolder listener's surfaceChanged() method is called, which finally takes

I was searching SO and web but i couldn't find sufficient answer for my particular question. Ok here we go: Every user can modify screen timeout on android. (when screen turns off when its idle for __ seconds/minutes - users choice ). But user can modify ONLY screen timeout and not when device goes actually to sleep. I found here what happens when device goes to sleep: (Really nice answer by CommonsWare) Android Sleep/Standby Mode Ok my question is simple. How do i know when my phone will go to sleep? Will it go to sleep immediately after turning screen off? Will it stay "awake" a while after

Is it possible to subscribe to a Windows event that fires when Windows is going into or coming out of Sleep or Hibernate state? I need my application to be made aware when the computer is going to sleep to do some cleanup and avoid timing issues when it comes out of sleep. Microsoft.Win32.SystemEvents.PowerModeChanged event will give you this information. This event is available in all variants of the .NET framework released by Microsoft so far. In .NET, use the PowerModeChanged event. In Win32, use the WM_POWERBROADCAST message. You can monitor Win32_PowerManagementEvent WMI event Not sure