Android Question CustomListView Java Exception when I add an item

uniplan

Active Member
Licensed User
Longtime User
Hi, i'm following this example:
https://www.b4x.com/android/forum/t...xible-list-based-on-scrollview.19567/#content
but i receive this error in log when i try to add an item into CustomListView.

java.lang.NullPointerException: Attempt to invoke virtual method 'int anywheresoftware.b4a.objects.collections.List.getSize()' on a null object reference
at anywheresoftware.b4a.samples.customlistview.customlistview._addtextitem(customlistview.java:50)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.shell.Shell.runVoidMethod(Shell.java:755)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:345)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:249)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:134)
at JHS.eliteScanner.frmlistafile.afterFirstLayout(frmlistafile.java:102)
at JHS.eliteScanner.frmlistafile.access$000(frmlistafile.java:17)
at JHS.eliteScanner.frmlistafile$WaitForLayout.run(frmlistafile.java:80)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5938)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)
(Exception) java.lang.Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'int anywheresoftware.b4a.objects.collections.List.getSize()' on a null object reference
 

eps

Expert
Licensed User
Longtime User
What's the actual code you are executing or is it just the example code? or have you modified the example or entered it manually?
 
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