Android maps: array index from associated exception

Question

I have a task to show 458 markers for display on Android maps. And to avoid performance issues, I update the data on the map using an AsyncTask instance.

Here is a short scenario of what I'm doing.

• I select the latitude / longitude of 458 locations around the UK.
• I run a loop, and according to the Android training blog, I add them to the ItemizedOverlay class
• After each 50th iteration, I call the publishProgress method to place 50 markers on the map.

After the 50th iteration, the stream goes to onProgressUpdate via publishProgress and here is my onProgressUpdate method onProgressUpdate

 // MapOverLays = mapView.getOverlays(); //This line was called in asyc task constructor // Hello Overlay is an instance of ItemizedOverlay. mapOverlays.add(helloOverLay); //MapView.getController - Also called in Constructor controller.setZoom(12); controller.animateTo(centerPoint); controller.setCenter(centerPoint); 

This code throws an ArrayIndexOutOfBoundException , and logcat does not display any class from my module. Here is a logcat dump if it develops my problem.

 12-07 11:34:48.644: ERROR/AndroidRuntime(508): java.lang.ArrayIndexOutOfBoundsException 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.google.android.maps.ItemizedOverlay.getIndexToDraw(ItemizedOverlay.java:211) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.google.android.maps.ItemizedOverlay.draw(ItemizedOverlay.java:240) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.google.android.maps.Overlay.draw(Overlay.java:179) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:42) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.google.android.maps.MapView.onDraw(MapView.java:476) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.View.draw(View.java:6535) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.drawChild(ViewGroup.java:1531) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.drawChild(ViewGroup.java:1529) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.View.draw(View.java:6538) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.widget.FrameLayout.draw(FrameLayout.java:352) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.drawChild(ViewGroup.java:1531) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.drawChild(ViewGroup.java:1529) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1258) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.View.draw(View.java:6538) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.widget.FrameLayout.draw(FrameLayout.java:352) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1830) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewRoot.draw(ViewRoot.java:1349) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewRoot.performTraversals(ViewRoot.java:1114) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.view.ViewRoot.handleMessage(ViewRoot.java:1633) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.os.Handler.dispatchMessage(Handler.java:99) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.os.Looper.loop(Looper.java:123) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at android.app.ActivityThread.main(ActivityThread.java:4363) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at java.lang.reflect.Method.invokeNative(Native Method) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at java.lang.reflect.Method.invoke(Method.java:521) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 12-07 11:34:48.644: ERROR/AndroidRuntime(508): at dalvik.system.NativeStart.main(Native Method) 

PS I tested the application with relatively smaller (10) and relatively large (150) iterations instead of 50. But the application throws the same error.

Answer 1

I temporarily got a solution. Instead of adding pins often, I first prepare the whole data and add it to the map using onPostExecute () as described by Android 2.1 GoogleMaps ItemizedOverlay ConcurrentModificationException , but it still doesn’t meet my requirement to save time for loading all contacts. However, I can get rid of this exception. But I expect any suggestions that improve download time .... Thanks anyway ... :-)

Answer 2

I had the same problem. It looks like this was caused by updating the data in ItemizedOverlay without calling populate .

 public class ListOverlay extends ItemizedOverlay<OverlayItem> { ... public synchronized void updateLocations(List<OverlayItem> newLocations) { locations.clear(); locations.addAll(newLocations); populate(); // this was missing } protected synchronized OverlayItem createItem(int index) { return locations.get(index); } public synchronized int size() { return locations.size(); } } 

Answer 3

setLastFocusedIndex (-1); filling ();

It doesn’t work "always" !!!

Answer 4

I had the same problem, only I get a slightly different glass. I found that the solution is to do the following to your itemizedOverlay object after adding overlays:

 setLastFocusedIndex(-1); populate(); 

I can not take credit for this, I found the answer here . I don’t know why you need it, but it works for me.

Answer 5

Just call mapView invalidate () on the user interface thread after adding new new elements to the overlay each time.