WIP: [android] Show the user a prompt to keep the app's data on uninstall #2036

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rtsisyk wants to merge 1 commit from rt-android-keep-data into master
Owner

Closes #1075

2022-02-07 10 03 26

Closes #1075 ### ![2022-02-07 10 03 26](https://user-images.githubusercontent.com/1799054/152740396-0865b6ae-ed33-414a-af14-afa205440ae4.jpg)
biodranik (Migrated from github.com) reviewed 2022-02-07 07:03:56 +00:00
pastk reviewed 2022-02-07 07:03:56 +00:00
vng (Migrated from github.com) reviewed 2022-02-07 07:03:56 +00:00
Owner

What will happen to this data if the user won't reinstall the app? Will he be able to delete it somehow?

What will happen to this data if the user won't reinstall the app? Will he be able to delete it somehow?
Author
Owner

@pastk, the app is not fully removed from Application Manager:
Screenshot_20220207-112005_Settings

@pastk, the app is not fully removed from Application Manager: ![Screenshot_20220207-112005_Settings](https://user-images.githubusercontent.com/1799054/152750659-ba1d1680-8f93-49e6-b8f3-1cbc89c31516.jpg)
Author
Owner

I tested this feature thoroughly. It looks like that this option is not compatible with automatic backups. Yes, Android preserves all app files both in /data/data/app.organicmaps and /sdcard/Android/data/app.organicmaps on uninstall. However, on the next install "AutoBackup" feature overwrites content of both folders and removes all saved data. 🤦 Disabling android:allowBackup fixes android:hasFragileUserData. I don't think that we want to enable this feature in favor of removal of automatic backups...

I tested this feature thoroughly. It looks like that this option is not compatible with automatic backups. Yes, Android preserves all app files both in `/data/data/app.organicmaps` and `/sdcard/Android/data/app.organicmaps` on uninstall. However, on the next install "AutoBackup" feature overwrites content of both folders and removes all saved data. 🤦 Disabling `android:allowBackup` fixes `android:hasFragileUserData`. I don't think that we want to enable this feature in favor of removal of automatic backups...
Owner

Also its not clear what use cases this feature will solve...
Temporary uninstall the app to reinstall it shortly after? To downgrade perhaps?
Looks like it won't be possible to e.g. uninstall Google version to later re-install an F-Droid one https://gist.github.com/agnostic-apollo/58def38fdb1c90563454974108ae52df
And given that OM has a lot of BIG files then the danger of users cluttering their devices is quite real...

Also its not clear what use cases this feature will solve... Temporary uninstall the app to reinstall it shortly after? To downgrade perhaps? Looks like it won't be possible to e.g. uninstall Google version to later re-install an F-Droid one https://gist.github.com/agnostic-apollo/58def38fdb1c90563454974108ae52df And given that OM has a lot of BIG files then the danger of users cluttering their devices is quite real...
Author
Owner

OK, this feature is broken. I am closing this PR and related ticket.

OK, this feature is broken. I am closing this PR and related ticket.
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Reference: organicmaps/organicmaps-tmp#2036
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