[android-developers] Re: Synchronizing Maps and Map Overlays - ConcurrentModificationException

2008-12-29 Thread Tim H. 

Check out this tutorial, it may help with your problem:

http://blogoscoped.com/archive/2008-12-15-n14.html

Tim

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[android-developers] Re: Synchronizing Maps and Map Overlays - ConcurrentModificationException

2008-12-29 Thread DMT 

Let me guess... r u invoking your code from *within* your custom
MyLocationOverlay code ?

I had the same Java exception as you until I moved my overlay updating
code OUT of my custom MyLocationOverlay class.
It seems that MyLocationOverlay also maintains a handle on the
overlays list, so that appeared(at least for me,) to be the source of
the ConcurrentModificationException.


On Dec 26, 6:59 pm, mscwd01 mscw...@gmail.com wrote:
 Okay, hope everyone had a nice christmas and has had their fill of
 Turkey ;)
 Now can anyone help me with this?

 On Dec 24, 11:53 am, mscwd01 mscw...@gmail.com wrote:

  Hello, anyone help me with this please...

  On Dec 24, 12:42 am,mscwd01mscw...@gmail.com wrote:

   I am getting the following exception:

   12-24 00:29:25.922: ERROR/AndroidRuntime(267): Uncaught handler:
   thread main exiting due to uncaught exception
   12-24 00:29:25.960: ERROR/AndroidRuntime(267):
   java.util.ConcurrentModificationException
   12-24 00:29:25.960: ERROR/AndroidRuntime(267):     at
   java.util.AbstractList$SimpleListIterator.next(AbstractList.java:59)
   12-24 00:29:25.960: ERROR/AndroidRuntime(267):     at
   com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:41)
   12-24 00:29:25.960: ERROR/AndroidRuntime(267):     at
   com.google.android.maps.MapView.onDraw(MapView.java:454)

   I believe this is whats happening:

   I have a MapView with a few Map Overlays (simple markers),
   occasionally the locations of the markers change so I clear the map
   overlays using: map.getOverlays().clear() and insert new marker
   overlays onto the map.

   However, if I happen to be moving the map, or zooming the map when the
   update occurs I get the aboveConcurrentModificationException.

   I tried synchronizing on the map overlay list, like:
   synchronized (map.getOverlays()) {
     // clear and update overlays

   }

   However I still get the above exception.

   Can someone explain the correct way to clear overlays on a map and to
   repopulate them without encountering ConcurrentModification
   Exceptions.

   Oh and I am calling: map.postInvalidate() to refresh the map and
   display the changes made to the overlays. Is this the correct way to
   repaint a map?

   Thanks
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[android-developers] Re: Synchronizing Maps and Map Overlays - ConcurrentModificationException

2008-12-29 Thread Peter Stevenson 

Peter Wrote:


  com.google.android.maps.MyLocationOverlay

Please note if MyLocationOverlay is a Class in Android


Peter





DMT wrote:
 Let me guess... r u invoking your code from *within* your custom
 MyLocationOverlay code ?

 I had the same Java exception as you until I moved my overlay updating
 code OUT of my custom MyLocationOverlay class.
 It seems that MyLocationOverlay also maintains a handle on the
 overlays list, so that appeared(at least for me,) to be the source of
 the ConcurrentModificationException.


 On Dec 26, 6:59 pm, mscwd01 mscw...@gmail.com wrote:
   
 Okay, hope everyone had a nice christmas and has had their fill of
 Turkey ;)
 Now can anyone help me with this?

 On Dec 24, 11:53 am, mscwd01 mscw...@gmail.com wrote:

 
 Hello, anyone help me with this please...
   
 On Dec 24, 12:42 am,mscwd01mscw...@gmail.com wrote:
   
 I am getting the following exception:
 
 12-24 00:29:25.922: ERROR/AndroidRuntime(267): Uncaught handler:
 thread main exiting due to uncaught exception
 12-24 00:29:25.960: ERROR/AndroidRuntime(267):
 java.util.ConcurrentModificationException
 12-24 00:29:25.960: ERROR/AndroidRuntime(267): at
 java.util.AbstractList$SimpleListIterator.next(AbstractList.java:59)
 12-24 00:29:25.960: ERROR/AndroidRuntime(267): at
 com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:41)
 12-24 00:29:25.960: ERROR/AndroidRuntime(267): at
 com.google.android.maps.MapView.onDraw(MapView.java:454)
 
 I believe this is whats happening:
 
 I have a MapView with a few Map Overlays (simple markers),
 occasionally the locations of the markers change so I clear the map
 overlays using: map.getOverlays().clear() and insert new marker
 overlays onto the map.
 
 However, if I happen to be moving the map, or zooming the map when the
 update occurs I get the aboveConcurrentModificationException.
 
 I tried synchronizing on the map overlay list, like:
 synchronized (map.getOverlays()) {
   // clear and update overlays
 
 }
 
 However I still get the above exception.
 
 Can someone explain the correct way to clear overlays on a map and to
 repopulate them without encountering ConcurrentModification
 Exceptions.
 
 Oh and I am calling: map.postInvalidate() to refresh the map and
 display the changes made to the overlays. Is this the correct way to
 repaint a map?
 
 Thanks
 
 

   


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[android-developers] Re: Synchronizing Maps and Map Overlays - ConcurrentModificationException

2008-12-28 Thread Al Sutton 

Please stop bumping this, if you're not getting replies it's because 
people are unable or unwilling to help and bumping will just annoy people.

Al.

mscwd01 wrote:
 hmmm, bump. Still havent worked this out.

 On Dec 26, 11:59 pm, mscwd01 mscw...@gmail.com wrote:
   
 Okay, hope everyone had a nice christmas and has had their fill of
 Turkey ;)
 Now can anyone help me with this?

 On Dec 24, 11:53 am,mscwd01mscw...@gmail.com wrote:

 
 Hello, anyone help me with this please...
   
 On Dec 24, 12:42 am,mscwd01mscw...@gmail.com wrote:
   
 I am getting the following exception:
 
 12-24 00:29:25.922: ERROR/AndroidRuntime(267): Uncaught handler:
 thread main exiting due to uncaught exception
 12-24 00:29:25.960: ERROR/AndroidRuntime(267):
 java.util.ConcurrentModificationException
 12-24 00:29:25.960: ERROR/AndroidRuntime(267): at
 java.util.AbstractList$SimpleListIterator.next(AbstractList.java:59)
 12-24 00:29:25.960: ERROR/AndroidRuntime(267): at
 com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:41)
 12-24 00:29:25.960: ERROR/AndroidRuntime(267): at
 com.google.android.maps.MapView.onDraw(MapView.java:454)
 
 I believe this is whats happening:
 
 I have a MapView with a few Map Overlays (simple markers),
 occasionally the locations of the markers change so I clear the map
 overlays using: map.getOverlays().clear() and insert new marker
 overlays onto the map.
 
 However, if I happen to be moving the map, or zooming the map when the
 update occurs I get the above ConcurrentModificationException.
 
 I tried synchronizing on the map overlay list, like:
 synchronized (map.getOverlays()) {
   // clear and update overlays
 
 }
 
 However I still get the above exception.
 
 Can someone explain the correct way to clear overlays on a map and to
 repopulate them without encountering ConcurrentModification
 Exceptions.
 
 Oh and I am calling: map.postInvalidate() to refresh the map and
 display the changes made to the overlays. Is this the correct way to
 repaint a map?
 
 Thanks
 
 
   


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[android-developers] Re: Synchronizing Maps and Map Overlays - ConcurrentModificationException

2008-12-27 Thread mscwd01 

hmmm, bump. Still havent worked this out.

On Dec 26, 11:59 pm, mscwd01 mscw...@gmail.com wrote:
 Okay, hope everyone had a nice christmas and has had their fill of
 Turkey ;)
 Now can anyone help me with this?

 On Dec 24, 11:53 am,mscwd01mscw...@gmail.com wrote:

  Hello, anyone help me with this please...

  On Dec 24, 12:42 am,mscwd01mscw...@gmail.com wrote:

   I am getting the following exception:

   12-24 00:29:25.922: ERROR/AndroidRuntime(267): Uncaught handler:
   thread main exiting due to uncaught exception
   12-24 00:29:25.960: ERROR/AndroidRuntime(267):
   java.util.ConcurrentModificationException
   12-24 00:29:25.960: ERROR/AndroidRuntime(267):     at
   java.util.AbstractList$SimpleListIterator.next(AbstractList.java:59)
   12-24 00:29:25.960: ERROR/AndroidRuntime(267):     at
   com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:41)
   12-24 00:29:25.960: ERROR/AndroidRuntime(267):     at
   com.google.android.maps.MapView.onDraw(MapView.java:454)

   I believe this is whats happening:

   I have a MapView with a few Map Overlays (simple markers),
   occasionally the locations of the markers change so I clear the map
   overlays using: map.getOverlays().clear() and insert new marker
   overlays onto the map.

   However, if I happen to be moving the map, or zooming the map when the
   update occurs I get the above ConcurrentModificationException.

   I tried synchronizing on the map overlay list, like:
   synchronized (map.getOverlays()) {
     // clear and update overlays

   }

   However I still get the above exception.

   Can someone explain the correct way to clear overlays on a map and to
   repopulate them without encountering ConcurrentModification
   Exceptions.

   Oh and I am calling: map.postInvalidate() to refresh the map and
   display the changes made to the overlays. Is this the correct way to
   repaint a map?

   Thanks
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[android-developers] Re: Synchronizing Maps and Map Overlays - ConcurrentModificationException

2008-12-24 Thread mscwd01 

Hello, anyone help me with this please...

On Dec 24, 12:42 am, mscwd01 mscw...@gmail.com wrote:
 I am getting the following exception:

 12-24 00:29:25.922: ERROR/AndroidRuntime(267): Uncaught handler:
 thread main exiting due to uncaught exception
 12-24 00:29:25.960: ERROR/AndroidRuntime(267):
 java.util.ConcurrentModificationException
 12-24 00:29:25.960: ERROR/AndroidRuntime(267):     at
 java.util.AbstractList$SimpleListIterator.next(AbstractList.java:59)
 12-24 00:29:25.960: ERROR/AndroidRuntime(267):     at
 com.google.android.maps.OverlayBundle.draw(OverlayBundle.java:41)
 12-24 00:29:25.960: ERROR/AndroidRuntime(267):     at
 com.google.android.maps.MapView.onDraw(MapView.java:454)

 I believe this is whats happening:

 I have a MapView with a few Map Overlays (simple markers),
 occasionally the locations of the markers change so I clear the map
 overlays using: map.getOverlays().clear() and insert new marker
 overlays onto the map.

 However, if I happen to be moving the map, or zooming the map when the
 update occurs I get the above ConcurrentModificationException.

 I tried synchronizing on the map overlay list, like:
 synchronized (map.getOverlays()) {
   // clear and update overlays

 }

 However I still get the above exception.

 Can someone explain the correct way to clear overlays on a map and to
 repopulate them without encountering ConcurrentModification
 Exceptions.

 Oh and I am calling: map.postInvalidate() to refresh the map and
 display the changes made to the overlays. Is this the correct way to
 repaint a map?

 Thanks
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