Android Question problem to use list

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

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

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