Android Question service - avoid execute service if already running

[leitor79]

Hi,

I have a service which is set to execute every 30 seconds to perform a simple task, that is configured like this:

Sub Service_Start (StartingIntent As Intent)

    Try
        StartServiceAt(Me, DateTime.Now + 30 * DateTime.TicksPerSecond, False)
        If StartingIntent.HasExtra("android.intent.extra.ALARM_COUNT") Then
        .
        .
        .

The question is... if, for some reason, the execution takes more than 30 seconds, will a second instance of the server be fired before the previous one finishes? In case of yes, which would be the best-practice approach to avoid that (ie: to fire the new start 30 seconds after the previous one finishes)?

Thank you very much!

 

[Erel]

Call StartServiceAt when you finish the current task.

 

[leitor79]

Hi Erel,

Thank you for your answer.

I've thought about that... but, if the service is configured to startatboot, will it start anyway, although StartServiceAt is at the end?

Thank you!

 

[DonManfred]

When your app is started at boot... Do your work and set a new startserviceat to shedule the next run and stop the service if you have done your work

 

[leitor79]

Hi, Don! Thank you for your answer!

And with what do I have to check the StartingIntent, besides ALARM_COUNT, to check if the service was automatically started at boot? Because I imagine that if I put the StartServiceAt at the end, the StartingIntent.HasExtra("android.intent.extra.ALARM_COUNT") will be "False" at first start?


Regards,

 

[Erel]

StartingIntent.Action will be "android.intent.action.BOOT_COMPLETED" when the service starts after boot.

 

[leitor79]

Thank you very much!

 

[Sgardy]

I solved this problem setting a global variable in my service (ImRunning = true), I check first Myservice.ImRunning before executing other. Do it's correct this approach?

 

[Peter Simpson]

@Sgardy you could have just used the following to test if a service is running.

'is ServiceName running in the background?
     If IsPaused("ServiceName") Then ...

 

[Sgardy]

Thank you Peter, I'm an absolute beginner I'll test it soon! Bye

 

[lemonisdead]

Peter is absolutely right but I would like to mention another way of writting the same thing (for others of course)

'is ServiceName running in the background?
If Not(IsPaused("ServiceName")) Then ...