Android Question problem to use list

[mohammad3250]

Hi
I want to store some non-duplicate information in the list but unfortunately it can get in the way of tips?

 

[DonManfred]

Should we guess what you have tried and how?
Show us your not working code. Best is to upload a small project which shows the Issue. Use File->Export as zip from the IDE

 

[mohammad3250]

Sub check (position As Int) As Boolean
    For i=0 To lanswer.Size-1
        If lanswer.Get(i)=position Then
            Return True
        End If
    Next
End Sub

If check(position)=False Then
        lanswer.Add(position)
    End If

I used a multi-panel and the value of each panel I want to save to when the user clicks again to see if they have already clicked on that panel.

 

[DonManfred]

I dont see how i could help.

I do not see you are defining a list here or working with one.

 

[LucaMs]

Sub check (position As Int) As Boolean
    For i=0 To lanswer.Size-1
        If lanswer.Get(i)=position Then
            Return True
        End If
    Next
End Sub

List useful method:

If lanswer.IndexOf(position) = - 1 Then
    ' first time, not added
Else
    lanswer.Add(position)
End If

Also, see Map objects, they are better.

 

[Erel]

Whenever you want to store non-duplicate items then you need a Map, or B4XOrderedMap or B4XSet. Last two are from B4XCollections.

 

[mohammad3250]

solved

Sub check (position As Int) As Boolean
    For i=0 To lanswer.Size-1
    dim item=lanswer.get(i) as typemode
        If item.id=position Then
            Return True
        End If
    Next