onTrimMemory is used only for API level 14 , I need to detect when app is backgrounded for api level <14

[sabrinemoumni]

What can I do to detect when app is backgrounded like new relic
I should'nt use the life cycle of activity

[Cheesebaron]

Why do you use OnTrimMemory to detect whether an app is in the background? That is not pretty at all. You could have a service which detects if the app is in the background like in this kiosk mode sample: https://github.com/Cheesebaron/KioskModeSample/blob/master/KioskMode/KioskService.cs#L59

Otherwise use OnStop and OnStart on your Activity to track whether it is in the background or not.

To be honest, this is not a MvvmCross specific question, but rather a general Android question. Please use StackOverflow for this. We try to keep GitHub issues for actual MvvmCross issues.

[sabrinemoumni]

ok I test this method but I have a fear , I wonder if it needs more resources of cpu and memory cause I will get all running task every second for exemple ?
concerning the life cyle, I can't intercept these methods
I use java android