B4i Library [class] CustomListView

Erel · Nov 6, 2014

B4i implementation of CustomListView (http://www.b4x.com/android/forum/th...xible-list-based-on-scrollview.19567/#content).

Note that you should make sure that there is a live reference to all instances of CustomListView. Otherwise the instance will be released and the events will not be raised.

You can use a global variable to store a live reference.

New version was uploaded. CustomListView is implemented as a custom view. It should be added with the designer.

V1.76 uploaded. This update brings the improvements added to B4A CustomListView:
- Animated inserts.
- ResizeItem method.
- FirstVisibleIndex / LastVisibleIndex properties.
- ScrollToItem.
- ReachEnd event.
- RemoveAt / ReplaceAt methods.

The class will be included as a library in B4i v4.30.

LucaMs · Dec 4, 2016

Erel said:
Declare all CustomListViews as process global variables and they will work properly.

A view declared as process globals?
Maybe because CustomListView is not a "really view"? But it containts "standard views".

Erel · Dec 4, 2016

This is B4i not B4A. There is no globals in B4i.

LucaMs · Dec 4, 2016

Erel said:
This is B4i not B4A. There is no globals in B4i.

Ops, I missed "the type" of forum

jahswant · Dec 5, 2016

Erel said:
Declare all CustomListViews as process global variables and they will work properly.

I think i don't understand this very well.

I need to make something like this.

B4X:

Sub ListViewCats_ItemClick (Index As Int, Value As Object)
    Reader.Concerned = PG.Title
    Reader.Subcat = Value
    Reader.Show
End Sub

This is my show code in reader

B4X:

Public Sub Show
    Main.NavControl.ToolBarVisible = False
    btnBack.InitializeText("Previous","Previous")
    If PG.IsInitialized = False Then
        PG.Initialize("PG")
        PG.RootPanel.LoadLayout("mainreader")
        PG.RootPanel.Color = Colors.White
        pnlContent.LoadLayout("readerlayout")
        PG.HideBackButton = True
    End If
  
    Main.NavControl.ShowPage(PG)
   
     ListViewCats.Clear

    PG.Title = "Learn Arabic" & " V " & Utils.GetVersion
  
    lblMenu.Text = Concerned
  
    lblSousMenu.Text = Subcat
  
    Timer1.Initialize("Timer1",1)
      
    ImageView1.Bitmap = Utils.ResizeImage (LoadBitmap(File.DirAssets,"play.png"),ImageView1.Width,ImageView1.Height)
  
    FillListView(Concerned,Subcat)
End Sub

First time it displays correctly but when i come for the second time.Items are not displayed correctly and the third time items are not visible at all.What are the best practices when you have to do such actions ?

Erel · Dec 5, 2016

Please start a new thread for this in the questions forum.

Alberto Iglesias · Feb 15, 2017

Do you have some sample to create programmatically?

I´ve tried this but not work!

B4X:

Dim clvComment As CustomListView
clvComment.Initialize(Me,"clvComment")
pnlLine.AddView(clvComment.GetBase,5dip,5dip,100%x,50dip)
clvComment.Clear

or how to get this view from layout?? Like this?

Dim clvComment As CustomListView = p.GetView(0)

Erel · Feb 16, 2017

No. You should add it with the designer. You can create a layout with CLV only and load it multiple times if you like.

Alberto Iglesias · Feb 16, 2017

OK. but how I get this view programatically, I mean, panel.getview(xxx)?

Erel · Feb 16, 2017

Nothing special. Declare a variable with the same name:

Alberto Iglesias · Feb 16, 2017

No... I undesrstand! but imagine you have a loop, and in this loop you get this layout with each customlistview. how I can get multiples instances? or how I can manipulate each this clv?

Erel · Feb 16, 2017

You can create a global array or list that holds all the lists:

B4X:

Private lists As List
...

lists = Array (CLV1, CLV2, CLV3)

For Each CLV As CustomListView in lists
 ...
Next

B4i Library [class] CustomListView

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