Hi,
thanks Mark for your advice, that's a nice input from you :)
On Sep 27, 5:26 pm, Mark Murphy <[email protected]> wrote:
> sleith wrote:
> > i've tested when the phone screen is off, the service is still
> > running, but when the service try to start intent, the screen is still
> > not shown because it's off. when the screen is on again, i can see the
> > intent that was launched by service.
> > is there any way to make the screen on by programming? because when we
> > receive call, the screen will on. so i think it is possible :D
>
> First, the warnings:
>
> 1. Your service will not be running for very long once the screen turns
> off. The phone will go to sleep, and your service will stop running when
> the phone turns off the CPU.
>
> 2. Doing things that wake up the phone are bad for battery life. See
> Jeff Sharkey's "Coding for Life...Battery Life, That Is" presentation
> from Google I/O 2009 for statistics.
>
> 3. Popping up user interfaces from a service are bad for the user
> experience. If the user is, say, in the middle of typing a text message,
> and your service-spawned activity steals the foreground, they may have
> quite a few profanities to fling in your direction. An incoming phone
> call is one of the few things users might tend to agree warrants such an
> intrusion...and I suspect there are still many a curse word used when
> users get interrupted, even for that.
>
> Hence, before you even bother with any code, you need to really make
> sure that this is what you want to do, and consider offering user
> preferences to disable this functionality.
>
> All that said, you will want to look at PowerManager.WakeLock to arrange
> to keep the screen and CPU on for a while. Which leads to:
>
> 4. Misusing WakeLocks are horrible for the battery. Do not leak an
> acquired WakeLock.
>
> --
> Mark Murphy (a Commons
> Guy)http://commonsware.com|http://twitter.com/commonsguy
>
> Android Training in Germany, 18-22 January 2010:http://bignerdranch.com
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