Android Question Help Please. Can ListView,File.WriteList ,File.ReadList work together?

[giga]

I am using ListView.
Once the user opens the app and starts a list it shows on the screen.
But if they close and reopen the app all input is gone.

Sub Activity_Create(FirstTime AsBoolean)
Activity.LoadLayout("layout1")
ListView1.Initialize("ListView1")



If File.Exists(File.DirRootExternal,"test.txt") Then
List1 = File.ReadList(File.DirRootExternal, "test.txt")
Else

ListView1.AddSingleLine("Item #"& EditText1.Text)
List1.Sort(True)
File.WriteList(File.DirRootExternal, "test.txt", List1)

End If

Activity.AddView(ListView1, 0, 0, 100%x, 60%y)
End Sub

Sub ListView1_ItemClick (Position AsInt, Value AsObject)

Activity.Title = Value

List1.Initialize
ListView1.AddSingleLine("Item #"& EditText1.Text)
File.WriteList(File.DirRootExternal, "test.txt",List1)

I must be missing something....
I believe my missing link is the input is not getting into the test document or not staying when closed, but it shows on the screen

Thanks as Always

 

[stevel05]

You are updating ListView1 with the contents of EditText1, which is displayed on screen, but you are not updating List1. So you are loading and saving an empty list.

 

[giga]

Thanks Stevel05, You're right I guess I have to focus more attention on one project at a time.

 

[giga]

I am updating the List1 now but running into an error: java.lang.IndexOutOfBoundsException: Invalid index 3, size is 3

example below: If I have a list of 5 rows but only 2 items were entered I get the above error. (seems to be coming from empty rows)

For i=1ToList1.Size-1

ListView1.AddSingleLine(i & List1.Get(1))

ListView1.AddSingleLine(i & List1.Get(2))

ListView1.AddSingleLine(i & List1.Get(3))

ListView1.AddSingleLine(i & List1.Get(4))

ListView1.AddSingleLine(i & List1.Get(5))

Is there a better way?
Thanks to ALL.

 

[DonManfred]

start counting from 0!

For i=0 To List1.Size-1

If the size is 3 then the entries are: 0, 1, 2

Maybe i understood it not right what your problem is.

Maybe you show more code of what you have done and explain what exactly you want to do...

If I have a list of 5 rows but only 2 items were entered I get the above error. (seems to be coming from empty rows)

sure you just add 2 items. You Add the items 1 and 2. You did forget to add item 0

Listindex out of bound tells you that you are referencing to an index of a list which does not exist. Thats not "an empty line". thats "Non exiting lines"...

Your list has a List1.Size of 3. Then you can get the items 0, 1 and 2.

But you are reading items 4, 5 and 6 (Index 3, 4 and 5) from List1 which are not existent and thats calls the exception "Listindex out of bounds"

List1.Get(3)
List1.Get(4)
List1.Get(5)

To add all List1-Entries into your ListView1 you have to write for example:

For i=0 To List1.Size-1
  ListView1.AddSingleLine(i & List1.Get(i))
next

 

[giga]

Thanks DonManfred that did the trick. I appreciate your help.