Android Question WriteList and ReadList

[sirjo66]

Hello to all,
I'm trying to Read and Write a List of Maps, but it don't works

Here is the code:

   Dim Ll As List
   Ll.Initialize
   
   Dim Mm As Map
   Mm.Initialize
   Mm.Put("Sigla", "AA")
   Mm.Put("Provincia", "Prima provincia")
   Mm.Put("Ipt", "30%")
   Mm.Put("Perc", "30")
   Ll.Add(Mm)
   
   Dim Mm As Map
   Mm.Initialize
   Mm.Put("Sigla", "BB")
   Mm.Put("Provincia", "Seconda provincia")
   Mm.Put("Ipt", "20%")
   Mm.Put("Perc", "20")
   Ll.Add(Mm)

   Dim Mm As Map
   Mm.Initialize
   Mm.Put("Sigla", "CC")
   Mm.Put("Provincia", "Terza provincia")
   Mm.Put("Ipt", "10%")
   Mm.Put("Perc", "10")
   Ll.Add(Mm)

   File.WriteList(File.DirDefaultExternal, "prov.cfg", Ll)

   ' now I read the List   
   Ll = File.ReadList(File.DirDefaultExternal , "prov.cfg")
   
   For x = 0 To Ll.Size - 1
     Dim Mm As Map
     Mm = Ll.Get(x)   ' <<<<<<<<< this don't work
   Next

 

[KMatle]

Error message? Is the file really created?

Important: If you have a problem, PLEASE post the code (well done) AND the error code (missing).

 

[DonManfred]

File.Writelist will write each entry of the list as String to the file. NOTE that the map now is a string.

Use RandomAccessfile.WriteB4XObject to write such a list of maps.

 

[DonManfred]

but it don't works

it works!

Read the documentation carefully.

File. WriteList (Dir As String, FileName As String, List As List)
Writes each item in the list as a single line.
Note that a value containing CRLF will be saved as two lines (which will return two item when read with ReadList).
All values will be converted to strings.
Example:
File.WriteList (File.DirInternal, "mylist.txt", List1)

 

[sirjo66]

Many thanks to KMatle and DonManfred

Yes, the error is that "I can't convert a String to a Map", and I'm sorry but I haven't read very well the documentation

I'll try with RandomAccessfile.WriteB4XObject

Many thanks
Sergio