Android Question CustomListView update item which is not in view

[TheRealMatze]

Hi,
i have CustomListViews to select items, but on the next page also the option to move to another item.
Now, i want to update this single item. I use this function to find and update:

Sub refreshSingleItemByID(searchID As String)
  
    For searchList=0 To clv1.Size-1
    Dim animalSelect As animalValue=clv1.GetValue(searchList)
    If animalSelect.animalID=searchID Then
      
        clv1.JumpToItem(searchList)
        clv1.Refresh
          
        Dim dbFarms As ResultSet = database.getanimal(searchID)
            Do While dbFarms.NextRow
                Dim fi As animalValue
                fi.animalname =dbFarms.GetString("na")
                fi.barnid =dbFarms.GetString("bi")
                fi.dayofbirth =dbFarms.GetString("db")
                fi.dayofcalv =dbFarms.GetString("cd")
                fi.animalid=dbFarms.getString("id")
                fi.pedigree=database.pedigree(dbFarms)
                fi.breed=dbFarms.getString("bc")
                fi.group=dbFarms.GetString("gr")
                fi.evalStatus=general.evaluationStatus(dbFarms)
      
            Dim p As B4XView=clv1.Getpanel(searchList)
          
                p.GetView(0).Text=fi.barnID                                '< here is the error...
                p.GetView(1).Text=fi.animalName
                p.GetView(2).Text=fi.dayofbirth
                p.GetView(3).Text= fi.dayofcalv
                p.GetView(5).Text=fi.pedigree
                p.GetView(6).Text=fi.breed
                p.GetView(7).Text=fi.group
                p.GetView(0).TextColor=fi.evalStatus.Color
          
            Loop
  
    End If
    Next
End Sub

That works fine as long as the item is in the visible area (but in the background). When the item is outside the view i got the error

Error occurred on line: 214 (animallist)
java.lang.RuntimeException: Object should first be initialized (View).
Did you forget to call Activity.LoadLayout?
    at anywheresoftware.b4a.AbsObjectWrapper.getObject(AbsObjectWrapper.java:67)
    at anywheresoftware.b4a.objects.B4XViewWrapper.GetView(B4XViewWrapper.java:318)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:348)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at anywheresoftware.b4a.debug.Debug.delegate(Debug.java:262)
    at sx.datacollector.animallist._refreshsingleitembyid(animallist.java:559)
    at sx.datacollector.evaluateanimal._btnstore_click(evaluateanimal.java:1096)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:193)
    at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
    at android.view.View.performClick(View.java:6597)
    at android.view.View.performClickInternal(View.java:6574)
    at android.view.View.access$3100(View.java:778)
    at android.view.View$PerformClick.run(View.java:25885)
    at android.os.Handler.handleCallback(Handler.java:873)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

I understand the error, but i have no idea how to fix it (without loading all items again)?

Regards
Matthias

EDIT: I measured the time i need to fill all elements again. It is practically invisible - so i update the whole list... But if anyone has a good idea it would be great

 

[Erel]

The simplest solution is usually the best one.

I can only guess that you have implemented lazy loading (which you should) and therefore the invisible items are not available.