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This format makes it easy to edit it manually. ' One common usage of File.WriteMap is to save a map of "settings" to a file. 'Reads the file and returns its content as a string. 'Example:<code> 'Dim text As String = Storage.ReadString(Storage.Root, "myfile.txt")</code> Public Sub R

You cannot use File.ReadMap and File.WriteMap because your values are lists not strings. You have to use Serializator (need RandomAccessFile lib) to save the file and retrieve it.. See below code: ' Write map to file Dim ser As B4XSerializator 'you need RandomAccessFile lbrary checked Dim ty
link: If I write the map in a file.txt, after map=File.ReadMap(..., File.txt) How Can I show the the values in CustomListView2 clicking on a key showed in

https://www.b4x..png File. WriteMap (Dir As String, FileName As String, Map As Map) Creates a new file and writes the given map. Each key value pair is written as a single line. All values are converted to strings.
link: The file content is: #Sat Jun 16 22:59:43 MESZ 2018 Pos2= The type is defined in Main Process_Globals: Type typProps(bezeichnung As String, preis As
link: It seems that the result from map.Get(sKey) is a string like "" and can not be casted into a custom type. Any idea, what I am doing wrong?
link: OK, I solved it with RandomAccessFile and WriteB4XObject - ReadB4XObject instead File.WriteMap - File.ReadMap

It will be ALL STRINGS after you save it this way. https://www.b4x..png File. WriteMap (Dir As String, FileName As String, Map As Map) Creates a new file and writes the given map. Each key value pair is written as a single line. All values are converted to strings. <--- !!! Use B4XSerializator to
link: Hello everyone. I've a Map, that will be saved using File.WriteMap Dim m1 As Map = CreateMap("Version": AppVersion, _
link: Ouhhh thanks.. i didn't read I did like so, seems to work (i don't know if is the best way) Dim ser As B4XSerializator '--- WRITE Dim p As CustomT

File.WriteMap converts all values to a string and saves one key: string-Value as a pair on each record/line in the file. The List is converted to a string. When read it is still a string. When you log the list and string they look the same. You need to use the B4XSerializator from the internal Ra
link: I was aware that WriteMap create a text file, with list represented using '{}', but I expected that ReadMap do the reverse and reconstruct the list fr
link: This was the solution for my problem. Thank you. I was not aware that WriteMap does not save the map in the right format. Then there is any differen

KVS2 is much better than File.WriteMap / ReadMap as a key value store. ReadMap / WriteMap create a text file so they only support simple types.
link: Whenever I have files in my apps that have key/value pairs (eg: settings files) I always create a map then use File.ReadMap2 & File.WriteMap. - Colin
link: Yep - I use KVS2 as well, but for simple text files with key/value pairs I use ReadMap & WriteMap - partly because I have a standard settings class th

File.WriteMap creates a text file. It will not work with raw bytes. You should use BytesToFile isntead: https://www.b4x./#content

Brilliant! Thanks so much, both Chris2 and Magma. I used Dim UserDir As String = File.DirData("Checkers") for both read and write (obviously :) ) File.Writemap(UserDir, "NmicroCore", Main.checkers) Works perfectly. Saves the data file in AppData\Roaming (see attachment).

The File methods in B4J are identical to B4A File methods. Text file methods File.WriteString - Writes the given text to a new file. File.ReadString - Reads a file and returns it content as a string. File.WriteList - Writes all values stored in a list to a file. All values are converted to string

Hi. My problem is to write on disk various Lists, in sequence, on same file. The saving sequence is: File.Delete(InternalWorkDir,FileUndo) File.WriteList(InternalWorkDir,FileUndo,Layers) File.WriteMap(InternalWorkDir,FileUndo,colorMap) b=rvs.ConvertObjectToBytes(layerMap.Size) ' jus

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