Only do the real work when something relevant has changed, such as the map center. Then draw to a Picture. In draw, just draw the Picture every time.
Neil http://l6n.org/android/ On Feb 10, 1:11 am, aspekt9 <[email protected]> wrote: > In my app I am drawing bus routes on top of a MapView. The routes have > anywhere between a dozen and a few hundred GPS coordinates that > describe the route that the bus takes. > > The problem I'm having is that once I draw out all these lines using > drawLines panning/zooming the MapView is incredibly slow (even > clicking the 'Back' button takes a minute to happen). > > I'm not sure how relevant it is, but I put in some debug code then > checked the logcat output and the MapView is repeatedly calling the > draw() method of the Overlay whether anything has changed or not. This > is happening several times a second and is causing a massive amount of > garbage collection to happen (2-3 MB every second). > > Does anyone have any ideas/suggestions for a method to try and speed > this up? -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
