Tiles Problem after recoverying from back stack

[osmdroid]

Tiles Problem after recoverying from back stack

[bigbottombill]

We're having a similar problem while using offline tiles. The following code is used to create the mapview instance

simpleReceiver = new SimpleRegisterReceiver(context);
mResourceProxy = new DefaultResourceProxyImpl(inflater.getContext().getApplicationContext());
final XYTileSource MBTILESRENDER = new XYTileSource("mbtiles", org.osmdroid.ResourceProxy.string.offline_mode,
MAP_MIN_ZOOM_LEVEL, MAP_MAX_ZOOM_LEVEL, 256, ".PNG", null);

final File f = MaptilesDatasource.getTilesDatabasePath(context); // the mbtiles file to use

final IArchiveFile[] files = { MBTilesFileArchive.getDatabaseFileArchive(f) };
baseMapModuleProvider = new MapTileFileArchiveProvider(simpleReceiver, MBTILESRENDER, files);
baseMapProvider = new MapTileProviderArray(MBTILESRENDER, null, new MapTileModuleProviderBase[] { baseMapModuleProvider });

return new OfflineTilesMapView(context, 256, mResourceProxy, baseMapProvider); // OfflineTilesMapView is a subclass of MapView

This works fine and the map is displayed correctly.
Then the back button is pressed and in the onDestroy of the activity using the mapview, we call the following code to clean up the providers

baseMapProvider.detach();
baseMapModuleProvider.detach();

The next time we go into the activity to see the map the following warning is repeatedly printed to logcat

RejectedExecutionException
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446): java.util.concurrent.RejectedExecutionException: Task org.osmdroid.tileprovider.modules.MapTileFileArchiveProvider$TileLoader@4524d6c8 rejected from java.util.concurrent.ThreadPoolExecutor@440b12f0[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 122]
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2011)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:793)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1339)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at org.osmdroid.tileprovider.modules.MapTileModuleProviderBase.loadMapTileAsync(MapTileModuleProviderBase.java:147)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at org.osmdroid.tileprovider.MapTileProviderArray.getMapTile(MapTileProviderArray.java:119)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at org.osmdroid.views.overlay.TilesOverlay$1.handleTile(TilesOverlay.java:170)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at org.osmdroid.util.TileLooper.loop(TileLooper.java:34)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at org.osmdroid.views.overlay.TilesOverlay.drawTiles(TilesOverlay.java:149)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at org.osmdroid.views.overlay.TilesOverlay.draw(TilesOverlay.java:136)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at org.osmdroid.views.overlay.OverlayManager.onDraw(OverlayManager.java:120)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at org.osmdroid.views.MapView.dispatchDraw(MapView.java:924)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13357)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13404)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13300)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13404)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13300)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13404)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13300)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13404)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13300)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13404)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13300)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13404)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3077)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13300)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.View.getDisplayList(View.java:13404)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.HardwareRenderer$GlRenderer.buildDisplayList(HardwareRenderer.java:1570)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1449)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.ViewRootImpl.draw(ViewRootImpl.java:2381)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2253)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1883)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.Choreographer.doCallbacks(Choreographer.java:574)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.Choreographer.doFrame(Choreographer.java:544)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.os.Handler.handleCallback(Handler.java:733)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.os.Handler.dispatchMessage(Handler.java:95)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.os.Looper.loop(Looper.java:136)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at android.app.ActivityThread.main(ActivityThread.java:5017)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at java.lang.reflect.Method.invokeNative(Native Method)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at java.lang.reflect.Method.invoke(Method.java:515)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
09-01 17:26:38.344: W/o*.o*.t*.m*.MapTileMod*(31446):   at dalvik.system.NativeStart.main(Native Method)

Also we are seeing memory issues when we have more than one instance of the mapview using the same tilesource.
Is there some additional clean up code that needs to be called in the activitys onDestroy() method?

[spyhunter99]

This can happen if you have any references to osmdroid that are static (MapView). That is, anything that has context shouldn't be static. Does that sound like it's a potential root cause?

[spyhunter99]

can you post your map creation code?

[spyhunter99]

problem not present for fragments
problem not present for activities
both can be witnessed in the sample application on branch bug/#57

[spyhunter99]

reopen if this is still a problem (and what version you're using)