B4J Question [RESOLVED] I Cannot Decipher This Error Message: java.lang.reflect.InvocationTargetException

[cklester]

I'm not sure what I've done. This project was working just fine until a few minutes ago. I can't figure out what I changed to make it suddenly not work. I have reverted whatever changes I thought could be causing it, but it still crashes with the message below on this line:

Root.LoadLayout("MainPage")

Here is the crash message:

Waiting for debugger to connect...
Program started.
Error occurred on line: 36 (B4XMainPage)
java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at anywheresoftware.b4a.keywords.Common.CallSubDebug2(Common.java:460)
    at b4j.example.b4xpagesmanager._createpageifneeded(b4xpagesmanager.java:826)
    at b4j.example.b4xpagesmanager._showpage(b4xpagesmanager.java:320)
    at b4j.example.b4xpagesmanager._addpage(b4xpagesmanager.java:149)
    at b4j.example.b4xpagesmanager._addpageandcreate(b4xpagesmanager.java:163)
    at b4j.example.b4xpagesmanager._initialize(b4xpagesmanager.java:117)
    at b4j.example.main._appstart(main.java:93)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:632)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:237)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:167)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:91)
    at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:98)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:78)
    at b4j.example.main.start(main.java:38)
    at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:846)
    at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:455)
    at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
    at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
    at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
    at anywheresoftware.b4a.debug.Debug.CallSub4(Debug.java:134)
    at anywheresoftware.b4a.debug.Debug.CallSubNew2(Debug.java:81)
    ... 35 more
Caused by: java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at anywheresoftware.b4a.debug.Debug.CallSub4(Debug.java:115)
    ... 36 more
Caused by: java.lang.ClassCastException: class sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl cannot be cast to class java.lang.Class (sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl and java.lang.Class are in module java.base of loader 'bootstrap')
    at anywheresoftware.b4j.objects.LayoutBuilder.loadLayoutHeader(LayoutBuilder.java:179)
    at anywheresoftware.b4j.objects.LayoutBuilder.loadLayoutHeader(LayoutBuilder.java:221)
    at anywheresoftware.b4j.objects.LayoutBuilder.loadLayout(LayoutBuilder.java:101)
    at anywheresoftware.b4j.objects.PaneWrapper.LoadLayout(PaneWrapper.java:101)
    at anywheresoftware.b4a.objects.B4XViewWrapper.LoadLayout(B4XViewWrapper.java:503)
    at b4j.example.b4xmainpage._b4xpage_created(b4xmainpage.java:92)
    ... 41 more

Any help or clues are much appreciated!

 

[jahswant]

Maybe you declared an object with a wrong type. Check the designer types.

 

[DonManfred]

Here is the crash message

where is the Projectupload?

 

[cklester]

where is the Projectupload?

Now attached to the OP!

 

[Erel]

Maybe you declared an object with a wrong type. Check the designer types.

That's the correct answer.

 

[cklester]

OK, I got it fixed. I was DIMming the ListView as a B4XView. I thought I could do that, then cast to a ListView when I wanted to change something in the list. No?

 

[Erel]

I guess that it is CustomListView, right?

 

[cklester]

I don't think it is. Just a normal ListView from the Designer.

 

[Erel]

There is indeed a bug here. However it is not really useful to set it to be a B4XView as its relevant methods are not available with B4XView . Best solution for a cross platform project, is to switch to xCustomListView (even for non-cross platform).

Or keep it as ListView.

It will be fixed...

 

[cklester]

There is indeed a bug here.

I'm delighted that I can contribute to making B4J more robust! ?

It looks like xCustomListView is in my Libraries Manager. Does that mean I downloaded it at some point, or does it come default with a B4J install?

 

[Erel]

or does it come default with a B4J install?

Yes, it is an internal library.