Bug? B4A 5.5 Beta #2: IllegalStateException

[corwin42]

I get the following exception with B4A 5.5 Beta #2 in one of my apps.

I haven't found the exact place where this exceptions happens. Maybe it is when I jump to a position in a custom listview.

10:51:42.840 - Cache Hit for 103_141_141
10:51:42.843 - Cache Hit for 103_141_141
java.lang.IllegalStateException: This method must only be called as part of a callback while a frame is in progress.
at android.view.Choreographer.getFrameTimeNanos(Choreographer.java:511)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2591)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2434)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2067)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

 

[Erel]

Did it crash your app?

 

[corwin42]

Yes, it crashed and I can reproduce it.

I will have to do some more checks, hopefully tomorrow. Fact is that it worked with 5.20 and crashes with 5.5 beta.
It crashes when I fill a CustomListview and jump to a specific line. If I don't jump to that line everything seems to be fine. Has something to do with the jump to the position in the Scrollview.

 

[Erel]

It will be very helpful if you can send me a project that reproduces this issue.

 

[corwin42]

Hmm, currently I'm unable to reproduce it in a simple project. It still happens in my app.

I fill two CustomListViews with entries. Both of them on a AHViewPager Page.
When the first LisView is filled, I jump to a specific entry of the CustomListView with JumpToItem.

The app crashes when all refreshes to the screen are done (seems so because the complete code has run).

If I remove the two DoEvents from JumpToItem the exception does not occur. If I fill both CustomListViews without jumping to the position in the first List everything is fine, too. After both listviews are initialized I can refresh the list entries and jump to an item, too.

I currently have no idea how to reproduce it. Fact is that in 5.20 all worked well. In 5.5 Beta I get the crash. Tried it on a Nexus 5 with Android 6 and a Nexus 7 with 5.1.1.

 

[Erel]

You can remove the DoEvents calls and use ScrollView.ScrollToNow instead.

 

[corwin42]

Interesting. I don't get the exception now but at first time (when the CustomListView is filled first) it do not jump to the specified item. Only at the second call.

But I now know how to solve it.

Thanks very much.