Calling IStyledTileSource.setStyle doesn't take effect immediately

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Tiles that are currently displayed continue to be displayed in the old style.

When you scroll to a new part of the map then the new style is displayed.

Original issue reported on code.google.com by neilboyd on 5 Jan 2011 at 8:57

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A MapView.invalidate() call would repaint the screen, but it would be nice if 
happened automatically and we didn't require the user to know they have to call 
invalidate.

Original comment by kurtzm...@gmail.com on 5 Jan 2011 at 3:30

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I tried that but it doesn't work because the old tiles are still in the memory 
cache so it just draws them again.

What's needed is a way to clear the memory cache, but I couldn't see how to get 
there from the point where you're setting the style.  That's why I made this 
issue to try again later.

Original comment by neilboyd on 5 Jan 2011 at 4:26

• Added labels: Priority-Low
• Removed labels: Priority-Medium

[GoogleCodeExporter]

Yes - you are right! I had to do the same when calling setRenderer(). Maybe 
it's as simple as adding a clearCache() method to MapTileProviderBase, or maybe 
there is a more elegant solution.

Original comment by kurtzm...@gmail.com on 6 Jan 2011 at 1:52

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Also related to issue 111

Original comment by kurtzm...@gmail.com on 12 Jan 2011 at 5:21

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Neil,

This can be accomplished by calling MapView.getTileProvider().clearTileCache() 
- I see that a MapView reference is not available (rightly so) in the tile 
source. So I can see a few recommended approaches - 

* Calling clearTileCache() manually from wherever you call setStyle()
* Calling setStyle() first on the tile source, and then re-passing the tile 
source in a call to MapView.setTileSource()

Obviously both require an extra call, and don't come "for free" by just calling 
setStyle, but I don't know if there is a way around that. By adding an example 
of doing this in the OpenStreetMapViewer activity or one of the samples, that 
should be enough for a user to get the idea. Personally, I like the second 
method (set the tile style, and then re-call setTileSource) of implementing 
this functionality.

Original comment by kurtzm...@gmail.com on 21 Jan 2011 at 1:51

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[deleted comment]

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That doesn't really work for me either because I'm using IMapView, not MapView 
directly.  I would need to keep a reference to the actual MapView or the 
ITileSource in order to do that.  However, despite that, I think the first 
solution would be better because it does less - something like this:

ITileProvider tileProvider = mapView.getTileProvider();
IStyledTileSource<Integer> styledTileSource = (IStyledTileSource<Integer>) 
mTileProvider.getTileSource();
styledTileSource.setStyle(style);
tileProvider.clearTileCache();

If this is documented in the IStyledTileSource.styledTileSource javadoc then I 
think that's enough to close this issue.

Original comment by neilboyd on 21 Jan 2011 at 10:49

[GoogleCodeExporter]

This has been documented and we can close this ticket.

Original comment by kurtzm...@gmail.com on 27 Feb 2011 at 5:26

• Changed state: Fixed