Error while jumping screens

[Ali_Aydin (Pme)]

Same problem

java.lang.RuntimeException: Unable to start activity ComponentInfo{appinventor.ai_pmesystem.Bilgiler/io.kodular.pmesystem.Bilgiler.Screen1}: java.util.ConcurrentModificationException
at android.app.ActivityThread.performLaunchActivity(Unknown Source:591)
at android.app.ActivityThread.handleLaunchActivity(Unknown Source:36)
at android.app.servertransaction.LaunchActivityItem.execute(Unknown Source:57)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(Unknown Source:99)
at android.app.servertransaction.TransactionExecutor.execute(Unknown Source:34)
at android.app.ActivityThread$H.handleMessage(Unknown Source:43)
at android.os.Handler.dispatchMessage(Unknown Source:21)
at android.os.Looper.loop(Unknown Source:210)
at android.app.ActivityThread.main(Unknown Source:107)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(Unknown Source:11)
at com.android.internal.os.ZygoteInit.main(Unknown Source:281)
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1441)
at java.util.HashMap$KeyIterator.next(HashMap.java:1465)
at com.google.appinventor.components.runtime.EventDispatcher.hxYOFxFjLpN1maJuWNxUV40nExCGxsxkDPOTgtzMu4zlZCQb3bPlKsXo1SYJg6ME(SourceFile:242)
at com.google.appinventor.components.runtime.EventDispatcher.dispatchEvent(SourceFile:199)
at com.google.appinventor.components.runtime.Slider.PositionChanged(SourceFile:422)
at com.google.appinventor.components.runtime.Slider.onProgressChanged(SourceFile:414)
at android.widget.SeekBar.onProgressRefresh(Unknown Source:9)
at android.widget.ProgressBar.doRefreshProgress(Unknown Source:65)
at android.widget.ProgressBar.refreshProgress(Unknown Source:21)
at android.widget.ProgressBar.setProgressInternal(Unknown Source:30)
at android.widget.ProgressBar.setProgress(Unknown Source:2)
at com.google.appinventor.components.runtime.Slider.moH2L3ThNq0Qhevz3oD0wpnUoXefdMi3gJ5JHfEbjrtgsvRvpM1e34BZQYI4s5i0(SourceFile:150)
at com.google.appinventor.components.runtime.Slider.(SourceFile:109)
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at gnu.expr.PrimProcedure.apply(PrimProcedure.java:272)
at gnu.mapping.CallContext.runUntilDone(CallContext.java:234)
at gnu.mapping.CallContext.runUntilValue(CallContext.java:298)
at gnu.kawa.reflect.Invoke.applyN(Invoke.java:209)
at gnu.mapping.ProcedureN.apply2(ProcedureN.java:39)
at io.kodular.pmesystem.Bilgiler.Screen1.$define(Screen1.yail:10248)
at com.google.appinventor.components.runtime.Form.onCreateFinish2(SourceFile:497)
at com.google.appinventor.components.runtime.Form.onCreateFinish(SourceFile:441)
at com.google.appinventor.components.runtime.Form.onCreate(SourceFile:380)
at android.app.Activity.performCreate(Unknown Source:16)
at android.app.Activity.performCreate(Unknown Source:1)
at android.app.Instrumentation.callActivityOnCreate(Unknown Source:3)
at android.app.ActivityThread.performLaunchActivity(Unknown Source:368)
… 11 more

CANCELFORWARD 1 DELETE 1 REPLY EDIT

[Peter (Moderator)]

How do you know this is related with the problem from the original post? I see you imported an aia from app inventor into kodular.

[Ali_Aydin (Pme)]

Hi Peter,

I started my project on ai2 in ~2013 then i switch to other ai2 platforms for new features.

its work before update. There is a problem with switching screens. When i was return to screen 1 my app fc.

[Peter (Moderator)]

Don’t hijack this topic. I created a new one.

[skulteti_balazs (Skultéti Balázs)]

How did you get get message?

[bodymindpower (Anke)]

There is a problem with switching screens.

See here: Only one Slider with Slider.PositionChanged event is possibe on a screen since Eagle

[Ali_Aydin (Pme)]

Thanks for mention,I use 2 slider at Screen1 maybe problem source is slider.

[bodymindpower (Anke)]

If you use the two sliders only on Screen1, this problem should not occur because Screen1 never needs to be reopened.
.

[Ali_Aydin (Pme)]

We need use Kodular reccommed screen swithing methods.If we dont use it some components not work correctly like notifier.

How to switch screens correctly

I see many issues done by users because they switched screens not correct. This below is now just one of many other solutions: [blocks] If you dont open/close screens correct your app will get possible runtime errors. Possible errors: (example) Unable to add window -- token android.os.BinderProxy@45d459c0 is not valid; is your activity running? Iam sure you don’t want that. Then please do it in the future and switch screens correct. General Tips and Tricks for App Inventor/Makeroid …

So screen1 closed and reopened on my app

[bodymindpower (Anke)]

So screen1 closed and reopened on my app

Yes, then your problem should be there too.

[Ali_Aydin (Pme)]

Thanks you find problem source.I disable one of the sliders position changed block and compiled my app.Its working

[bodymindpower (Anke)]

Fine, but I have 4-6 sliders in many of my apps that are all needed. So we have to wait for a bugfix …

[Ali_Aydin (Pme)]

Try this ,its new

[bodymindpower (Anke)]

Try this ,its new

Ok, thanks, I’ll take a look at that later … and test …

[bodymindpower (Anke)]

Try this

I tried it, and the app does not crash, fine, but it does not store / get the correct values of the TinyDB, when switching screen … check it

maybe am wrong … I am now a bit confused …

Screen1:

Screen2:

sliderBug2.aia (27.1 KB)

Companion works, APK not. Tested on Android 5 / 9.

[Ali_Aydin (Pme)]

Yes its works on companion and its not work on real app.I wiil test it on ai2 and if its not work i will report to ai2 team

[bodymindpower (Anke)]

Thanks, I checked it and it works on AI2.

[Ali_Aydin (Pme)]

Yes its works on ai2.

@KodularCreator Can you check this bug guys?