VERY Simple sample of a watch face with a background process.

This one really doesn't do much. It displays the time, an indication if it's on a device that supports background processes (you can see how that's checked in the App Class), The count of the times the background process has run, and the data returned from the background. It does cache data in the object store, so after the first time the background runs, it will have data.

The background process is a Temporal event, and runs every 5 minutes. All the background does is return a string with a time stamp (HH:MM). There are a number of Sys.println() calls to see what's going on. If you have a watch that supports background processes (f5's,chronos,935,735,va-hr), create a <myapp>.txt in logs to catch the println() calls, as you see kind of a neat thing where those that come from the background are marked as such!

This runs in the sim can you can use the code to build a sideload. In addition to devices that support background processes, I included the fenix 3 as a target so you can see how it works on a watch that doesn't.

if you have questions about the code, just ask!

Top Replies

Bodya over 4 years ago +2

For some reasons I can’t find source code of your example. Could you help me with it? Thank you!
jim_m_58 over 4 years ago in reply to Bodya +2

The original sample was posted before the forum SW changed last April, but here it is again. (I've probably changed it slightly since then )

6735.vsbgwf.zip
jim_m_58 over 4 years ago in reply to thoms +2

looks like it might have.

Here's close to what I first posted.

7750.vsbgwf.zip

All Replies

jim_m_58 over 4 years ago in reply to thoms

looks like it might have.

Here's close to what I first posted.

7750.vsbgwf.zip

thoms over 4 years ago in reply to jim_m_58

That was fast: thank you!!!

2848586 over 4 years ago

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li2niu over 2 years ago

Expert JIM， Thank you for this tutorial thread

jim_m_58 over 2 years ago in reply to li2niu

No problem!

Tavis 4 months ago

Hi Jim. Would you be able to give a quick illustration where to insert the makehttprequest code into your example ?

jim_m_58 4 months ago in reply to Tavis

In the background services, you do the makeWebRequest in onTemporalEvent. In the call, you specify a callback function..

What I do in that callback, if the responseCode is 200, I do a Background.exit() of the data. If it's not 200, I do the Background.exit() of the response code so I can see that in the main app.

Tavis 4 months ago in reply to jim_m_58

Thank you very much. I think i'm starting to understand. Would you be interested in helping me build a datafield that is pulled from a json document online with update interval of 5 minutes ? This is for weather related data (eg. realtime wind info) so you might be interested in it since you wrote the OWM app. I have gotten a DF program to work in the simulator based on another thread (the watertempdf thread). I have to manually trigger it via Background Event selection in the simulator and it works, but doesn't do anything when installed on the watch (fenix 6s saphire).

flocsy🤠 4 months ago in reply to Tavis

Look at Background.registerForTemporalEvent in the documentation. You need to call it from your app

Tavis 4 months ago in reply to flocsy🤠

Thanks for the reply. My code does this already in the getInitialView function call

// Return the initial view of your application here
    function getInitialView() as Array<Views or InputDelegates>? {
        if (Background.getTemporalEventRegisteredTime() != null) {
            Background.registerForTemporalEvent(new Time.Duration(5 * 60));
        }