android maps : array index out of bound exception

Question

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

Here is a short scenario of what I do.

1. I fetch the latitude/longitude of 458 locations around UK.
2. I run the loop and as per Android Blog tutorial I add them in ItemizedOverlay class
3. After every 50th iteration I call publishProgress method to place 50 markers in map.

After the 50th iteration the flow goes into onProgressUpdate via publishProgress and here is my code of onProgressUpdate method

// MapOverLays = mapView.getOverlays(); 
//This line was called in asyc task's 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 ArrayIndexOutOfBoundException and the logcat doesn't show any of the class from my module. Here is the logcat dump if it elaborates 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)

P.S. I have tested the application with relatively smaller (10) and relatively larger (150) iterations instead of 50. But the application throws same Error.

Answer 1

I had the same problem. Looks like it was caused by updating the data in the ItemizedOverlay without calling populate afterwards.

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 2

setLastFocusedIndex(-1); populate();

Not "always" work !!!