Private Sub Button1_Click
'Not working
CustomListView1.DesignerLabel.As(B4XView).TextSize = 60
End Sub
The DesignerLabel is a template that is used when adding text items. Changing the DesignerLabel properties after the items were already added will have no effect.
You can change the text size with:
B4X:
Private Sub Button1_Click
For i = 0 To CustomListView1.Size - 1
Dim item As CLVItem = CustomListView1.GetRawListItem(i)
If item.TextItem Then
item.Panel.GetView(0).GetView(0).TextSize = 30
End If
Next
End Sub