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From: Arno Welzel <usenet@arnowelzel.de>
Newsgroups: comp.mobile.android
Subject: Re: Where are MMS-messages stored in Android 15 ?
Date: Wed, 18 Dec 2024 00:30:55 +0100
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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.



-- 
Arno Welzel
https://arnowelzel.de