Android Question Sub Main closed on Android 11

[ostau]

Hi,
I do have an app, which starts another activity from Sub Main. After closing the sub, the program flow returns to Main.Activity_Resume when executed on Android <= 10. But it returns to Main.Activity_Create(false) on Android 11. It seems, on 11 the Activity Main gets destroyed, while on <= 10 it resumes (as desired).
Some facts to know: the app has been developed four years ago, based on Android 6 and has been maintained over the years. We do not use B4XPages

Has anyone an idea to overcome this different behavior?
Kind regars, Oskar

 

[agraham]

This behaviour could be expected on earlier versions of Android as well. If Android needs the memory if will destroy activities as required, even if they are on the Activity stack. You need to keep enough state to be able to cope with that. Note that as Main.Activity_Create(false) is called your process still exists and your Process_Globals are intact.

 

[DonManfred]

B4A - Life Cycle

There is nothing wrong here.

 

[kisoft]

The only correct solution in this situation is to switch to B4XPages... ? Sorry, someone must have said that ...

 

[DonManfred]

The only correct solution in this situation is to switch to B4XPages... ? Sorry, someone must have said that ...

It is not the only solution. One can fight with these for sure.
But B4XPages will help a lot if he switch to B4XPages; you are right

 

[kisoft]

It is not the only solution. One can fight with these for sure.
But B4XPages will help a lot if he switch to B4XPages; you are right

Of course you are right ... My previous quote was meant to be humorous, unfortunately my English made this statement flattened ...

 

[tigrot]

I have a small pjt based on B4xPages. Activity is terminated and from my foreground service I have to activate again when system kills it.

 

[ostau]

Thanks to all members for their fast replies . I was aware, that Android destoys activities, if not enough memory is available. But strange - blieve it or not - my device is an OneNote Plus 8 with 6 GB of RAM, which is used by 40%. On a simple Lenovo-Tab (with Android 6) and 2 GB RAM the app runs as a charme for hours. It also ran on my own device on Android 10 before the update to version 11 was installed. Anyway: it seems I have to brush up the app, because switching to B4XPages seems to be a task for Hercules :-( . I didn't find a simple way to modify the existing app with appropriate efforts.

 

[ostau]

Finally I found the reason for the different behaviour: on the phone in the developpers settings the option "Do not store activities" was turned on. So all activities where closed - instead of keeping them in memory till not longer needed or memory runs out .