Once list saved as file can not retreive as list! How do Measure?

MIT App Inventor Help
1

Hi Inventors,
I want to save list as one file.
Once I save some lists as File, lists got from File can not remain as llist.
I can not use "length of list" . It must be error.
How can I save list into File, remains to be useful "length of list"

SuzukiS

2

store it as table in csv format
just use the list to csv table block before storing the file

and to read the file again and convert the csv table into a list, then use the list from csv table block

Taifun

3

or, you can use this
image

to change a jsonArray (the list string you saved in file) to a list.

1 Like
4

Hi there,
Thanks so much,
I can confirm "list to csv table" useful now.
I had to ask concerning this topic earlier.
I have been annoyed several days.

SuzukiS