Android Question RESOLVED: Upgrade of Android cleans up databases in File.DirInternal

[b4auser1]

Nexus 5, Sony Experia Z2: LL 5.x -> MM 6.0
After upgrade app starts as just after installation. It doesn't find databases in File.DirInternal.

Small patches: F.e. MM 6.0 -> MM 6.01
there are no problems.

What shoud I do to prevent it ?

 

[Erel]

File.DirInternal is supposed to be kept during OS upgrades.

You can also use File.DirDefaultExternal. Both should be kept.

 

[b4auser1]

File.DirInternal is supposed to be kept during OS upgrades.

Yes. And after small patches (6.0 -> 6.0.1) there is no a problem.
After major upgrade there is the process of optimization of apps. I suppose that this process affects apps.

 

[Erel]

Have you "hard coded" the path to the internal folder? Or did you use File.DirInternal?

If the files were deleted from File.DirInternal then the problem is in the upgrade process. It is not related to any optimization step.

 

[b4auser1]

Have you "hard coded" the path to the internal folder

Thank you for the idea ! I use File.DirInternal, but I store the value of File.DirInternal in the settings file in order to know where my db are located in File.DirInternal or in File.DirDefaultExternal.
I checked:
KK, LL: File.DirInternal = "/data/data/testapp/files"
MM: File.DirInternal = "/data/user/0/testapp/files"
Google changed path to support multiply users on the device.

I did additional check to resolve this issue.