Saving Data from a Background Process (setProperty)

Jim (or others who have done this)...

My background process is now working really well. Thanks for the help. I do wish in a Data Field, that (like watch faces and widgets) the 5 min trigger delay would be reset upon the start of a new activity or device power cycle. I don't get why a data field would act differently. The whole point of the 5 minutes is to not overwhelm the device. So this one time reset seems like a good idea.

But, since this isn't available. I need to save the prior data along with a timestamp. Then retrieve that old data (if not too old) while waiting for the 5 min trigger delay to expire.

I could save this data using a setProperty call in the background process that gets the data. Or in the foreground process each time it gets new data.

Any tips on a Best Practice? My idea is to first check for new data. If waiting for the delay, then go look in the saved properties and use that value if its timestamp is < 30 mins.

Thanks!

Top Replies

jim_m_58 over 2 years ago in reply to 3649079 +1

Instead of trying to save it in the Background Service, you could try returning in the Background.exit() call, and then have the WF save it in onBackgroundData(). That's the way I use data I get in a background…

All Replies

3649079 over 2 years ago in reply to jim_m_58

4.1.5

jim_m_58 over 2 years ago in reply to 3649079

Does it work if you use saveValue instead of saveProperty?

3649079 over 2 years ago in reply to jim_m_58

Application.getApp().setProperty("lastEventTime",eventTime);

works if not background otherwise produces

"Exception: Background processes cannot modify the object store"

So far not found any other valid syntax with setValue, saveValue, saveProperty

jim_m_58 over 2 years ago in reply to 3649079

Application.Property.setValue() if you want to save a property, and

Application.Storage.setValue() for saving to app storage

See https://developer.garmin.com/connect-iq/core-topics/persisting-data/#persistingdata

setProperty() is actually marked as Deprecated

jim_m_58 over 2 years ago in reply to 3649079

This could be a bug with the venu2 and the sim. Does it work on the real device?

3649079 over 2 years ago in reply to jim_m_58

Am using Settings accessible by the Gamin Connect IQ app and saved in properties for continuity.

It's in test on the Sim, would require more work to try it on the device.

Examples are few and far between but it looks like to have a watch face activated at a certain time, it or something has to run in background.

Will continue investigations - it is linked to

https://forums.garmin.com/developer/connect-iq/f/discussion/314782/is-it-possible-to-refresh-the-screen-to-stay-on-longer

An answer to which might help find another way.

If there is a way to activate a watch face at a certain time without background that would simplify the issue.

jim_m_58 over 2 years ago in reply to 3649079

Instead of trying to save it in the Background Service, you could try returning in the Background.exit() call, and then have the WF save it in onBackgroundData(). That's the way I use data I get in a background.