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Am I doing something wrong or is this a bug? I know I shouldn't be using ReadObject if I know the file wasn't written with WriteObject, but I want to let the user select any file they choose and then read the Map that was written to it - if there is one: File.WriteString(File.DirApp, "test.txt"
link: That's the problem. ReadObject is looping endlessly trying to read data that isn't there because the file is not in the expected format. Having said t
link: Exactly what I was thinking :)

OK, so resolved this by writing the file using randomaccessfile (writeb4xobject) and reading in using readb4xobject to maintain the list structure. 'Write file' Dim r As RandomAccessFile r.Initialize(File.DirDocuments,"test.lst",False) r.WriteB4XObject(ASDraw1.ExportDrawing,0) r.close 'Re

Hard without seeing your code. I always use RandomAccessFile. You can write and read any object you like (lists, maps, texts, etc.). Here it is encrypted, too. Dim raf As RandomAccessFile raf.Initialize(MyPath, "config.dat", False) raf.WriteEncryptedObject(MyList, "MySecretPW", raf.CurrentPosition)
link: so, to read a text file to a list but preserving its contents : dim raf As RandomAccessFile raf.Initialize(somePath,someFile, False) dim TextList as

Or RandomAccessFile.WriteB4XObject / ReadB4XObject.
link: RandomAccessFile allows you to write or read data from any point in the file. This is less relevant if you are using WriteB4XObject as you will not kn
link: ditto for writing it back out. with the randomaccessfile library, it seems to me that to correct the 10th record, i either have to read all the recor

I receive error with RandomAccessFile WriteEncryptedObject. I previously use it in other project without problem. Dim F As RandomAccessFile F.Initialize(PathFich, NomFich, False) Dim B(FileSize) As Byte 'Some B initialization F.WriteBytes(B, 0, B.Length, 0) F.WriteEncryptedObject("A String", "M

I receive error with RandomAccessFile WriteEncryptedObject. I previously use it in other project without problem. Dim F As RandomAccessFile F.Initialize(PathFich, NomFich, False) Dim B(FileSize) As Byte 'Some B initialization F.WriteBytes(B, 0, B.Length, 0) F.WriteEncryptedO

Hey, during WriteB4XObject the app crashes, so the file is maybe damaged, if I try to read the file now, the app crashes. I put the reading in a try catch block, the problem is it doesn't prevent the app from crashing the same happens with writing. Try If File.Exists(TokenFolder, Tok
link: Found it If raf.Size <> 0 Then ti = raf.ReadB4XObject(raf.CurrentPosition) End If
link: (I never use these methods, only B4XSerializator with File.ReadBytes / WriteBytes)

b4a.randomaccessfile.RandomAccessFile.writeObject(RandomAccessFile.java:486) at anywheresoftware.b4a.randomaccessfile.RandomAccessFile.writeMap(RandomAccessFile.java:596) at anywheresoftware.b4a.randomaccessfile.RandomAccessFile.writeType(RandomAccessFile.java:545) at anywheresoftware.b4

If you do it right then it does work. Use RandomAccessFiles WriteB4XObject/ReadB4XObject

For example: 'Activity.LoadLayout("Layout1") CL1.Initialize lsL.Initialize End Sub Sub Activity_Resume CL1.a=1 CL1.b=2 lsL.Add(CL1) Msgbox("OK","") End Sub Sub Activity_Pause (UserClosed As Boolean) End Sub
link: In an Activity with List.Add(Obj), when the Obj is a instance of a class, in the Obj members will have a member that is the activity, why? For exampl
link: I do not think this can happen "automatically", only if you have added an activity to your class instance (perhaps a reference, a variable). Can you
link: This is not a bug. Class instances are not supported by RAF.WriteObject: https://www.b4x..html#randomaccessfile_writeobject

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