Android Question custom list view Error

[aligol]

For i=1 To 80
Dim n As B4XView = xui.CreatePanel("mm")
n.SetLayoutAnimated(0,0,0,100%x,40dip)
n.LoadLayout("L_items_unit")
Label1.Text="unite"& i
clv_units.Add(n,"")

Next

Error occurred on line: 42 (Main)
java.lang.NullPointerException: Attempt to invoke virtual method 'int anywheresoftware.b4a.objects.collections.List.getSize()' on a null object reference
at b4a.example3.customlistview._add(customlistview.java:71)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runVoidMethod(Shell.java:777)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:354)
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 b4a.example.main.afterFirstLayout(main.java:105)
at b4a.example.main.access$000(main.java:17)
at b4a.example.main$WaitForLayout.run(main.java:83)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6190)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:892)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:782)

I wrote a code a while ago and that worked perfectly , but now it gives me this error. I'm new and don't know where is this problem occur and how solve that. I'll be appreciate if some one help me.

 

[Alexander Stolte]

in which line does the error occur? best to share the project.

 

[Mahares]

best to share the project.

I'll be appreciate if some one help me

Theoretically, your code looks perfect although it looks better if you use code tags. See below:

For i=1 To 80
        Dim n As B4XView = XUI.CreatePanel("mm")
        n.SetLayoutAnimated(0,0,0,100%x,40dip)
        n.LoadLayout("L_items_unit")
        Label1.Text="unite"& i
        clv_units.Add(n,"")
    Next

The error is somewhere else, not in this code. As the powerhouse Alexander suggested.: Attach your project reproducing the error or post a lot more relevant code.