SAF: App Inventor implementation of Storage Access Framework

Anke · October 17, 2021, 11:18am

Yes, but you asked

and the answer is (again) no.

But you can select / pick e.g. a text file from the root dir of the external storage and read / write from / to it.

albert_choong · October 17, 2021, 12:49pm

Hi
If I don't select a document in open single document list and click the back button all the way to the root level I get this error message.

I am using the Saf_readWrite.aia sample

vknow360 · October 17, 2021, 1:13pm

If you didn't choose a document, then uriString and uri returned will be empty.

albert_choong · October 17, 2021, 1:20pm

If I decide not to choose a document and just want to get back to the main screen, How do I close the list without getting this error?

vknow360 · October 17, 2021, 1:24pm

Check if uriString is empty or not before proceeding.

Taifun · October 17, 2021, 1:31pm

Usually empty string and nothing are not the same... this is something which should be fixed in the extension

Taifun

vknow360 · October 17, 2021, 1:45pm

The error is from FileTools extension, so yeah needs to be fixed.

albert_choong · October 17, 2021, 1:59pm

Okay thank you.

I put in some blocks to check for urlString empty.
Seems to work...

vknow360 · November 2, 2021, 1:42pm

ChangeLog Version 1.1

New Blocks

Changes

Removed category param from OpenSingleDocument method
GotCopyResult and GotMoveResult now return resulting/target document's uri

Bug Fixes

Fixed issue in write methods
Fixed null pointer exception when SAF picker was cancelled by user
Reported by @Kevinkun

Paul · December 1, 2021, 6:30pm

I'm having a problem.
I use SAF.openDocumentTree and in SAF.gotUri I save the uriString in tinydb so that the next time I can use the uriString from there.
When i put SAF.listFiles in SAF.gotUri I get result from listFiles.
However when I press a button in my app and do 'openFiles' and use the value from tinydb the app stops. well not really stops, but goes to background and nothing happens.

vknow360 · December 2, 2021, 1:16pm

Can you post a link to sample apk?

Paul · December 2, 2021, 7:45pm

I made a basic app with same SAF components/functions and then it works how it should work.
So it's something in my app, I will walk through it again.
Is it possible that file scopes are breaking SAF?

vknow360 · December 3, 2021, 12:57am

Definitely no.

Paul · December 4, 2021, 12:42pm

I tried my app on my old phone (Android 7.1), it works there, not on my new phone (Android 11).
When I put the SAF.listFiles in SAF.gotUri on the Android 11 phone it works, but the app crashes when I only save the uriString to tinyDb in SAF.gotUri and have a separate listFiles function.
I could put SAF.listFiles in SAF.gotUri, but that's not nice, then the user must select the folder each time when they get in this screen or press on showFiles button.

Peter · December 4, 2021, 12:48pm

Can you post an aia that shows the behavior?

vknow360 · December 4, 2021, 2:12pm

Did you take the persistable uri permission?

Paul · December 4, 2021, 2:23pm

What does that mean?

Paul · December 4, 2021, 2:25pm

ah, I see

What are flags?

TIMAI2 · December 4, 2021, 2:28pm

see here

Paul · December 4, 2021, 2:53pm

It's working now
Thanks!!