A me funziona con il codice che ti allego
B4X:
Sub Process_Globals
'These global variables will be declared once when the application starts.
'These variables can be accessed from all modules.
Dim Nome As String ="Nome"
Dim Email As String = "indirizzo@email.it"
Dim Pwd As String ="pwd"
End Sub
Sub Globals
'These global variables will be redeclared each time the activity is created.
'These variables can only be accessed from this module.
Type Utente(Codice As Int, User As String,Pwd As String, Email As String)
Dim ListView2 As ListView
End Sub
Sub Activity_Create(FirstTime As Boolean)
'Do not forget to load the layout file created with the visual designer. For example:
'Activity.LoadLayout("Layout1")
ListView2.Initialize("ListView2")
Activity.AddView(ListView2,0dip,0dip,50%x,100%y)
' Popola il file Users
For i=0 To 4
Dim Rec As Utente
Rec.User=Nome & " " & i
Rec.Email=Email & " " & i
Rec.Pwd=Pwd & " " & i
WriteRec(Rec)
Next
ReadRec
End Sub
Sub Activity_Resume
End Sub
Sub Activity_Pause (UserClosed As Boolean)
End Sub
Sub BSignup_Click
Dim Rec As Utente
Rec.User=Nome
Rec.Email=Email
Rec.Pwd=Pwd
WriteRec(Rec)
'StartActivity(login)
End Sub
Sub WriteRec( rec As Utente )
Dim f As RandomAccessFile
f.Initialize(File.DirRootExternal,"Users", False)
Dim RecNumber As Int = UltimoCodice
rec.Codice=RecNumber
Log("RECNUM" & RecNumber & " Codice " & rec.Codice & " user " & rec.User)
f.WriteObject(rec, False, RecNumber)
Log("rec " & rec & "RecNumber " & RecNumber)
f.Close
End Sub
Sub UltimoCodice As Int
Dim f As RandomAccessFile
f.Initialize(File.DirRootExternal,"Users", False)
Return f.Size
End Sub
Sub ReadRec
Dim f As RandomAccessFile
Dim Line As String
Dim DataRecord As Utente
f.Initialize(File.DirRootExternal, "Users" , True)
Do While (f.CurrentPosition < f.Size )
Log("Current " & f.CurrentPosition)
DataRecord=f.ReadObject(f.CurrentPosition)
Line=DataRecord.Codice & " " & DataRecord.User & " " & DataRecord.Pwd & " " & DataRecord.Email
Log(Line)
ListView2.AddSingleLine(Line)
Loop
f.Close
End Sub
