Wild stab in the dark here, but ConcurrentModificationException happens when you try to alter the contents of a Collection (in this case some kind of list) when that list is being iterated over.
It kooks like what you're doing is modifying a UI object while the UI is actually doing some internal processing. Rather than modify the object directly in the callback, try posting yourself a message (or a Runnable) that will be executed by the Main message handler. Doug On Jun 26, 3:19 pm, jgostylo <[email protected]> wrote: > I am trying to integrate a third party location finding service into > my app and I am using the results of the location to place an overlay > onto my map. The answer to this question is not "use > MyLocationOverlay". I am moving away from that for non-GPS accuracy > reasons. > > When the third party location callback is executed, I update where > this overlay is to reflect the new location. Doing this makes the > application throw a ConcurrentModificationException. Here is the full > stack trace: > > ERROR/AndroidRuntime(5440): Uncaught handler: thread main exiting due > to uncaught exception > ERROR/AndroidRuntime(5440): java.util.ConcurrentModificationException > ERROR/AndroidRuntime(5440): at java.util.AbstractList > $SimpleListIterator.next(AbstractList.java:66) > ERROR/AndroidRuntime(5440): at > com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:44) > ERROR/AndroidRuntime(5440): at > com.google.android.maps.MapView.onDraw(MapView.java:471) > ERROR/AndroidRuntime(5440): at android.view.View.draw(View.java: > 5838) > ERROR/AndroidRuntime(5440): at android.view.ViewGroup.drawChild > (ViewGroup.java:1486) > ERROR/AndroidRuntime(5440): at android.view.ViewGroup.dispatchDraw > (ViewGroup.java:1228) > ERROR/AndroidRuntime(5440): at android.view.ViewGroup.drawChild > (ViewGroup.java:1484) > ERROR/AndroidRuntime(5440): at android.view.ViewGroup.dispatchDraw > (ViewGroup.java:1228) > ERROR/AndroidRuntime(5440): at android.view.View.draw(View.java: > 5841) > ERROR/AndroidRuntime(5440): at android.widget.FrameLayout.draw > (FrameLayout.java:352) > ERROR/AndroidRuntime(5440): at android.view.ViewGroup.drawChild > (ViewGroup.java:1486) > ERROR/AndroidRuntime(5440): at android.view.ViewGroup.dispatchDraw > (ViewGroup.java:1228) > ERROR/AndroidRuntime(5440): at android.view.ViewGroup.drawChild > (ViewGroup.java:1484) > ERROR/AndroidRuntime(5440): at android.view.ViewGroup.dispatchDraw > (ViewGroup.java:1228) > ERROR/AndroidRuntime(5440): at android.view.View.draw(View.java: > 5841) > ERROR/AndroidRuntime(5440): at android.widget.FrameLayout.draw > (FrameLayout.java:352) > ERROR/AndroidRuntime(5440): at > com.android.internal.policy.impl.PhoneWindow$DecorView.draw > (PhoneWindow.java:1847) > ERROR/AndroidRuntime(5440): at android.view.ViewRoot.draw > (ViewRoot.java:1217) > ERROR/AndroidRuntime(5440): at > android.view.ViewRoot.performTraversals(ViewRoot.java:1030) > ERROR/AndroidRuntime(5440): at android.view.ViewRoot.handleMessage > (ViewRoot.java:1482) > ERROR/AndroidRuntime(5440): at android.os.Handler.dispatchMessage > (Handler.java:99) > ERROR/AndroidRuntime(5440): at android.os.Looper.loop(Looper.java: > 123) > ERROR/AndroidRuntime(5440): at android.app.ActivityThread.main > (ActivityThread.java:3948) > ERROR/AndroidRuntime(5440): at > java.lang.reflect.Method.invokeNative(Native Method) > ERROR/AndroidRuntime(5440): at java.lang.reflect.Method.invoke > (Method.java:521) > ERROR/AndroidRuntime(5440): at com.android.internal.os.ZygoteInit > $MethodAndArgsCaller.run(ZygoteInit.java:782) > ERROR/AndroidRuntime(5440): at > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540) > ERROR/AndroidRuntime(5440): at dalvik.system.NativeStart.main > (Native Method) > > I am assuming that this third party callback is not executed in a safe > way. Is there a paradigm I should follow to make sure that this is > executed safely? For instance, does anyone know what > MyLocationOverlay does to make sure its callback is executed safely > for updating the overlay? I could not find source for > MyLocationOverlay. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
