java.util.ConcurrentModificationException

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    • java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextEntry(HashMap.java:787) at java.util.HashMap$KeyIterator.next(HashMap.java:814) at com.google.appinventor.components.runtime.EventDispatcher.delegateDispatchEvent(EventDispatcher.java:219) at com.google.appinventor.components.runtime.EventDispatcher.dispatchEvent(EventDispatcher.java:198) at com.google.appinventor.components.runtime.Button.Click(Button.java:51) at com.google.appinventor.components.runtime.Button.click(Button.java:43) at com.google.appinventor.components.runtime.ButtonBase.onClick(ButtonBase.java:656) at android.view.View.performClick(View.java:4780) at android.view.View$PerformClick.run(View.java:19866) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5254) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

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