How to detect than an application is not the one the user interact with?

Question

In windows phone we had some life cycles that aren't available in UWP.

The application that I develop communicate over Bluetooth. At the moment, I communicate with the Bluetooth device every 1 minute. However when the user switches to another application or just turn the screen off (and the application is still running) I would like the communication to communicate every 10 minutes.

However, when I switch between applications, or even turn the screen off, the OnSuspending isn't being fired.

Is there any other way I can detect application switch or screen turned off.

I know this question has no code attached to it, however I investigated the UWP life cycles, but the solution wasn't in there.

Thx

did you register an event handler for the Application.Suspending event? [Look here](https://msdn.microsoft.com/en-us/windows/uwp/launch-resume/app-lifecycle) — AR5HAM, Jun 10 '16 at 02:46
I put a break point in App.cs. This event didn't fire. Also, when I simulated OnSuspending from VS2015 menu and the event/Detection is fine. — eitan barazani, Jun 10 '16 at 02:48
How about, App Resuming OR OnNavigatedTo events? any of those fire? — AR5HAM, Jun 10 '16 at 02:53

score 1 · Accepted Answer · edited May 23 '17 at 11:58

While debugging the suspending event won't be fired, due to disabled PLM. You will have to invoke it manually from lifecycle tab. Normally, when you run without debugger attached, it will be fired up to few seconds after you left the app - lock screen, switch app, etc.

For your purposes the Suspending event will be the best, IMHO. Otherwise you may also think of Window.Current.VisibilityChanged and Window.Current.Activated - but those two doesn't have deferals and can be fired in other situations, not only the ones you have mentioned.

How to detect than an application is not the one the user interact with?

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