Android Question B4x - Loop through Labels in a List

EstasPerplejo said:

Hi guys.
I encounterd a problem and I can't seem to figure it out.
Using B4X 13 on Android 15

I created 3 labels in the designer, added the name of the label-views to a list.
Now I want to change the text of each label within a small loop and get an error message...

Could someone here give me hint what I am doing wrong?
Thanks so much.

Here is my code:

===========================================

Labels in a loop:

Sub Class_Globals
    Private Root As B4XView
    Private xui As XUI
  
    Private Label1 As Label
    Private Label2 As Label
    Private Label3 As Label
  
    Public Ranks(3) As Label
    Ranks = Array As Label (Label1, Label2, Label3)
  
  
End Sub

Public Sub Initialize
'    B4XPages.GetManager.LogEvents = True
End Sub

'This event will be called once, before the page becomes visible.
Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    Root.LoadLayout("MainPage")
  
End Sub

'You can see the list of page related events in the B4XPagesManager object. The event name is B4XPage.

Private Sub Button1_Click
  
    For i = 0 To 2
        Ranks(i).text = "abc"
    Next
  
End Sub

=============================================================


Here is the error message:
=================

Logger verbunden mit: Google Pixel 8 Pro
--------- beginning of main
Copying updated assets files (1)
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create (first time) **
Call B4XPages.GetManager.LogEvents = True to enable logging B4XPages events.
** Activity (main) Resume **
Error occurred on line: 38 (B4XMainPage)
java.lang.RuntimeException: Object should first be initialized (Label).
Did you forget to call Activity.LoadLayout?
at anywheresoftware.b4a.AbsObjectWrapper.getObject(AbsObjectWrapper.java:67)
at anywheresoftware.b4a.objects.TextViewWrapper.setText(TextViewWrapper.java:39)
at b4a.example.b4xmainpage._button1_click(b4xmainpage.java:78)
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:157)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:201)
at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:80)
at android.view.View.performClick(View.java:8036)
at android.view.View.performClickInternal(View.java:8013)
at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
at android.view.View$PerformClick.run(View.java:31237)
at android.os.Handler.handleCallback(Handler.java:959)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loopOnce(Looper.java:232)
at android.os.Looper.loop(Looper.java:317)
at android.app.ActivityThread.main(ActivityThread.java:8705)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:580)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:886)

Click to expand...

dim labelViews As List
labelViews.Initialize2(Array As label(label1, label2, label3))

for each l as label
    l.text = "abc"
Next

EstasPerplejo said:

Ranks = Array As Label (Label1, Label2, Label3)

Click to expand...

EstasPerplejo said:

Ranks = Array As Label (Label1, Label2, Label3)

Click to expand...

EstasPerplejo said:

Your tip helped solving this problem! Worked perfectly well...

Click to expand...