TaifunFile1 CopyAsync - info

MIT App Inventor Help
#1

Hello.
Can anyone help?
I want to make a SQLite1 copy of the file dbKnihy.db from ASD to a folder
file:///storage/emulated/0/MojeSubory/.

blocks(3)
blocks(3)694×52 6.51 KB

blocks(1)
blocks(1)802×110 8.62 KB

I tried to do it via:

the copy was not created.
So I tried via:
vystup is: file:///storage/emulated/0/MojeSubory/dbKnihyZaloha.db

blocks(13)
blocks(13)840×162 14.3 KB

its not working.

Ondrej

#2

Sorry.
Sorry.
It is:

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blocks(14)720×110 8.75 KB

#3

And one more question:
Can it be tested also via Al Companion or only via .apk?
Ondrej

#4

You need to set Screen1 properties: FileScope to Legacy, then you can use the File component to copy the file (copy from "App" to "Legacy".

#5

You can't copy files to arbitrary directories anymore with newer devices, see also Some basics on Android storage system

Taifun

2 Likes
#6

Hello.
So which folder should I make the backup to?
And via CopyAsnc or Export?
Ondrej

#7

Thanks.

#8

The ASD can only be accessed by your app and is automatically removed when the app is uninstalled....

But when I want to back up the dbKnihy.db file even after uninstalling my application....e.g. due to a major app update, how should I do it? Where should I backup the file?
Ondrej

#9
  1. Move it from the ASD to a subfolder of /Documents/ (e.g. /Documents/SAFE/data.db). After reinstalling the app, the file can then be read from there.
  2. Upload the file to a cloud. If the app is then installed on a new device, this file can be downloaded at the first start.
#10

Thanks