[franzli]

Originally Posted by notimp

@franzli: Was quicker than expected, because the likebooks behavior actually was normal at this point.

I just switched between the eink launcher, the built in launcher, KOReader and Librera, without them closing on me.

The only prerequisite was, that both the apps I wanted to have remaining running in the background were set as "being allowed to do so" in the Usersettings/Powesavings/something menu.

So it does work. And its normal android behavior at this point. I had a second launcher (eink Launcher) switch between them as well, and that also worked, without them being closed.

So - at this point, its

- either the app you are using
or
- their android killing processes in the background after a certain memory or app number threshhold in which case this is intermittent behavior and not fun to troubleshoot


In short - everything I've seen so far tells me that "it should work" (If the app thats launching the others does not specify , that it absolutely wants them launched "fresh").
(Android normal behavior is, that if you call any app name, the app will be launched in "its current state" if its already running, and be launched if its not - so thats actually not something that launchers usually mess up.)

So may I as you what you'd require in specific? alt+tab as a keycombination working, an applet on screen that can launch from one app into another?

I didn't use any such trinkets on android in the past, so my guess on what works is as good as yours at this point.

Because we are dealing with an unrooted device, there are several "tricks" an app might perform, to be able to act as a launcher from within another app. One I'd look for is, that it would put up a persistent notification (that way it doesnt get killed from ram), another way is that the app can actually require permission to see what other apps are running (thats grantable in Android 6 afair), and the third one would be to put up an overlay over any other app, thats grantable as well.

Everything should be possible in theory.

Thanks for your reply. I tried a few more apps from the playstore and indeed one that has a persistent notification in the status bar (Recent Bar) is the only one that actually works. All the others seem to be designed to call up the regular, Android-internal recents screen (just what you'd get if there actually was a recents button, or using Alt+Tab), but it appears that for some unfathomable reason Boyue decided to deactivate that core functionality in the system, so there simply is no Recents screen.
That's something I'm honestly quite disappointed about because it seems so unnecessarily silly/restrictive, but with the notification app I can at least come close to emulating an actual Recents menu, although it is still more cumbersome than I'd like.