Android Question Saving a list with name and MAC adresses for BT

[Amateurtje]

Hello, I am very new with B4A and run into a problem with saving a list.I want to save different BT connections in a list.(to show in listview)

    Type NameAndMac (Name As String, Mac As String)
dim NM as nameandmac

I save with:

templist.Add(connectedDevice)
File.WriteList(File.DirRootExternal,"MyList.txt",templist)

I would like to read with:

If File.Exists(File.DirRootExternal, "MyList.txt") Then
templist = File.ReadList(File.DirRootExternal,"MyList.txt")

  For i = 0 To templist.Size - 1
 Dim nmtemp As NameAndMac
   nmtemp = templist.Get(i)
   lstUsedDevices.AddSingleLine2(nmtemp.Name,nmtemp.Mac)
  Next
 End If

Problem:
When reading the saved templist the elementdata looks like:
0=[IsInitialized=false, Mac=20:13:10:15:43:01, Name=HC-05
1=]

I thought there was a crlf in the name or the line was too long so I substitute the name with a "1".. This did not help.. How can it be that it is divided into 2 elements and I cna not read it back into the list??

 

[DonManfred]

File.WriteList

You can not write custom types with this. The result is a STRING in the file (or when you read it).

You can write it with (Randomaccessfile)

raf.writeb4xobject

and read it back with

raf.readb4xobject

Check this tutorial https://www.b4x.com/android/forum/threads/b4x-network-asyncstreams-b4xserializator.72149/

 

[Amateurtje]

in the tutorial i see nothing about saving a file, only sending and RAF is not recognised by my BA....the ranodom accesfile library is activated (2.32)...

 

[Amateurtje]

found it. sorry, i am very new and some things I am not used to..
I forgot to define
Dim raf As RandomAccessFile
and I have to get used to initialising... it will come to me..please be patient..

Thanks for the help!