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From: Frank Slootweg <this@ddress.is.invalid>
Newsgroups: comp.mobile.android
Subject: Re: Where are MMS-messages stored in Android 15 ?
Date: 18 Dec 2024 10:27:04 GMT
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Arno Welzel <usenet@arnowelzel.de> wrote:
> Frank Slootweg, 2024-12-17 19:16:
> 
> > Arno Welzel <usenet@arnowelzel.de> wrote:
> >> Frank Slootweg, 2024-12-16 15:49:
> >>
> >> [...]
> >>>   As to "not all apps allow to backup their data.": With the USB
> >>> connection, one can backup all app-private folders and files, so one
> >>> *can* backup the data of all apps. Unless there's some other kind of
> >>> restriction you're not divulging.
> >>
> >> At least many Banking apps usually do not allow to backup their data.
> >> And it does not matter, if the backup is done via ADB or as part of the
> >> Google app backup.
> > 
> >   And *how* can those banking apps "not allow to backup their data"!?
> > Especially for the ADB case.
> 
> Their app manifest forbids it. This can be achieved like this:
> 
> <?xml version='1.0' encoding='utf-8'?>
> <manifest xmlns:android="http://schemas.android.com/apk/res/android"
>   xmlns:tools="http://schemas.android.com/tools"
>   tools:replace="allowBackup"
>   android:allowBackup="false" />
> 
> The entry tools:replace="allowBackup" makes sure, that any libaries used
> by the app which have their own manifest, do not allow backup accidentally.
> 
> And ADB will obey that and won't pull lany backups for those apps.

  Thanks for your information. It might come in handy if I ever
encounter any such apps.

  FWIW, I'm not worried about my banking apps not being allowed/able to
backup their data, because any relevant data can most likely be
recovered from my accounts on the banks servers. I.e. if lost, the
on-device data is recoverable.

  N.B. It would be interesting to know if other computer programs - such
as Samsung's 'Smart Switch' - also honor the manifest settings, but
given my above mentioned low interest, I don't think I will try.