suspend/resume messages on Android?

[Terry Judd]

On 08/05/2013, at 12:46 PM, J. Landman Gay wrote:

> On 5/7/13 8:29 PM, Terry Judd wrote:
>> Hi Jacque (or anyone else?) - I may have misunderstood but I'm not
>> getting any messages sent when an app is 'suspended' and 'resumed' on
>> Android (4.2.2). No shutdown message on 'suspend' and no opencard
>> message on 'resume'. Does the shutdown message only get sent when the
>> app 'quits' (when imposed by the OS or the user)?
>> 
>> Looks like I may have to resort to using timers and activity
>> monitoring ;(
> 
> That's too bad. I do know you can trap the backKey message but for some reason we don't get a homeKey message.
> 
> I used to worry about it, but after running a lot of Android apps I've noticed that most of them just pick up where they left off if they are still in memory, or else they start over again if they aren't. It must be a common problem. But that doesn't help you much if you need to do processing no matter how the user leaves.

Yeah - I need to do two things, submit 'session' data when the user suspends (on iOS I actually have to store this locally and then send it when the user resumes), and logout the user after a given time if the app has been suspended (there are potential security issues with some of the data our users are accessing). I had this all sussed on iOS but it's going to take a major rethink on Android.
> 
> I'm guessing the OS probably doesn't notify the app that it's suspended.

Maybe not. I think you can potentially get a list of active processes and determine which one is active. If we could poll that list using an external - if we ever get externals for Android - then we could build our own suspend and resume routine.

Terry...

> 
> -- 
> Jacqueline Landman Gay         |     jacque at hyperactivesw.com
> HyperActive Software           |     http://www.hyperactivesw.com
> 
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Dr Terry Judd
Senior Lecturer in Medical Education
Medical Eduction Unit
Faculty of Medicine, Dentistry & Health Sciences
The University of Melbourne