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Thread: Which API to go for

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	Replies: 15 - Pages: 2 [ 1 2 \| Next ] - Last Post: 21-Jun-2008 16:31 Last Post By: tampstaffs

renuka

Posts: 38
Registered: 02/11/07

Which API to go for
Posted: 29-May-2008 07:41

Hi to all,

My requirement is to Launch a feature of my application at Scheduled Time.(This is set by the user).I used RTImer,but after some research I found that it doesnot work properly for long durations( On phones).Can I use any one of ther two apis i.e ALarm server or Calender. Which one would be a better choice. If i use Aalarm server, can I notify the alarm( within the application, which handles the launch of the feature) with out displaying any Alarm dialog.

Regards,
Renuka.

Jevgenij V. Gag...

Re: Which API to go for
Posted: 29-May-2008 08:21

in response to: renuka

Just an idea...
What about having a RTimer ticking, let's say, every 100ms. Then in RunL()
(or whatever callback) you would have something like:

//is it time to launch a feature:
TTime currTime;
currTime.HomeTime();
int currTimeInt = CalcSeconds (currTime);
int startTimeInt = CalcSeconds (iStartTime);
int diff = (currTimeInt - startTimeInt);

//init
iStartTime.HomeTime();

"renuka" wrote in message news:75366@developer.symbian.com...
Hi to all, My requirement is to Launch a feature of my application at
Scheduled Time.(This is set by the user).I used RTImer,but after some
research I found that it doesnot work properly for long durations( On
phones).Can I use any one of ther two apis i.e ALarm server or Calender.
Which one would be a better choice. If i use Aalarm server, can I notify the
alarm( within the application, which handles the launch of the feature) with
out displaying any Alarm dialog. Regards, Renuka.

renuka

Posts: 38
Registered: 02/11/07

Re: Which API to go for
Posted: 29-May-2008 09:07

in response to: Jevgenij V. Gag...

HI,

I tried even keeping a check in RunL, where i confirm that home time is same as Scheduler time and then if yes Launch it. But when i had that it never launched.When i remove that check, If i set the scheduled time for 1 hr,it launches for 30 min.

alie

Posts: 110
Registered: 26/11/06

Re: Which API to go for
Posted: 29-May-2008 09:08

in response to: renuka

u can use RScheduler for this

Alie

Jevgenij V. Gag...

Re: Which API to go for
Posted: 29-May-2008 09:25

in response to: renuka

I mean, that you make the RTimer complete every
100ms or every 50ms or every 1s "in a loop" and in RunL you calculate the
difference between start time and current time (at RTimer each tick).

void RunL() {

calculate time
difference,

if not yet expired,
then

RTimer->After(100000); //wait for the imprecise 100ms more and check
difference again.

else

launch
feature, exit

}

But maybe it's worth going a simpler way and using
RScheduler as is suggested in the other reply to your post

"renuka" wrote in message news:75373@developer.symbian.com...
HI,
I tried even keeping a check in RunL, where i confirm that home time is same
as Scheduler time and then if yes Launch it. But when i had that it never
launched.When i remove that check, If i set the scheduled time for 1 hr,it
launches for 30 min.

alie

Posts: 110
Registered: 26/11/06

Re: Which API to go for
Posted: 29-May-2008 09:29

in response to: renuka

dont use RTimer, it consumes battery

Alie

renuka

Posts: 38
Registered: 02/11/07

Re: Which API to go for
Posted: 29-May-2008 09:32

in response to: alie

hi ,

Thank you for the reply. I will try to find more about it.Is there any working example u can point me too??

alie

Posts: 110
Registered: 26/11/06

Re: Which API to go for
Posted: 29-May-2008 09:43

in response to: renuka

here is the link:
http://wiki.forum.nokia.com/index.php/Deleting_schedules_and_tasks_using_RScheduler

renuka

Posts: 38
Registered: 02/11/07

Re: Which API to go for
Posted: 29-May-2008 09:48

in response to: alie

Hi Alie,

Thanks,I was just going through the same.In that example it says, we give the path of Exe, but my client is dll.Server is exe. I have this code in server, do i need to call the exe or dll. hmm if this is a silly doubt excuse me,as this is the first time I am dealing with this sort.

alie

Posts: 110
Registered: 26/11/06

Re: Which API to go for
Posted: 29-May-2008 09:52

in response to: renuka

Hi,

of course ur exe... u can send ur data/message to dll thru exe

Alie

renuka

Posts: 38
Registered: 02/11/07

Re: Which API to go for
Posted: 29-May-2008 10:16

in response to: alie

HI Alie,

I tried to run the RSchedule example in emulator it says, execution not allowed for security reasons -46???

Edited by: renuka on 29-May-2008 11:17

tanzimhusain

Posts: 270
Registered: 23/11/07

Re: Which API to go for
Posted: 29-May-2008 11:48

in response to: renuka

Hi renuka,

If you try reading the documentation on RScheduler, you'd see that you need WriteDeviceData capability for your application. I'd guess the -46 (KErrPermissionDenied) is coming from the lack of appropriate platsec capability.

Cheers.

renuka

Posts: 38
Registered: 02/11/07

Re: Which API to go for
Posted: 29-May-2008 12:13

in response to: tanzimhusain

HI MaxPayne,

That worked.Hm,I think i was reading the wrong doc were it said capabailities required were none. i was trying this example http://wiki.forum.nokia.com/index.php/Image:RScheduler_Example.zip. But it does not auto Launch itslef after the timer expires.

Edited by: renuka on 29-May-2008 12:17

majuemcc

Posts: 1
Registered: 09/04/08

Re: Which API to go for
Posted: 30-May-2008 08:59

in response to: alie

Alie,

On what basis are you saying
"dont use RTimer, it consumes battery"?

What is the alternative then if I need to do things from time to time in my thread?

tanzimhusain

Posts: 270
Registered: 23/11/07

Re: Which API to go for
Posted: 30-May-2008 12:29

in response to: majuemcc

Hi majuemcc,

There's no reason why you can't use timers, its just you need to carefully consider their usage in your code, speciallly if its going to be part of a long running process.

Timers basically prevents the phone to go into standby mode, hence effectively keeping the phone up and drain battery for nothing, hence the issue.

Have a look at this thread for a related discussion https://developer.symbian.com/forum/thread.jspa?threadID=25659&tstart=0

You might also want to read this.

Hope that helps.

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