Is there a way to enumerate the existing markers on a map? Worst case I could use your hashmap approach and then clear() the map if the number of markers exceeds 50 (for example)
On Saturday, January 5, 2013 9:31:52 AM UTC-5, Mark Murphy (a Commons Guy) wrote: > > I cannot speak with regards to tile overlays, as I have not played > with that portion of the API. > > With respect to markers, AFAICT, you cannot set an ID -- the ID from > getId() presumably is system-generated. If you do not need one of the > other marker attributes (e.g., snippet), you could overload that and > put an identifier in there. We also cannot subclass Marker, partly > because it is final, and partly because the MarkerOptions structure > does not allow us to specify any sort of factory. Hence, you cannot > add an ID field to your own Marker subclass, the way we could subclass > OverlayItem in Maps V1. > > The only other workaround that I have seen is to use a > WeakHashMap<Marker, Something>, for looking up additional data on a > per-Marker basis. The WeakHashMap will allow our Something objects to > get garbage-collected after their corresponding Marker objects are. > > And, yes, this sucks. Cyril Mottier had similar complaints: > > http://android.cyrilmottier.com/?p=855 > > On Sat, Jan 5, 2013 at 8:52 AM, lbendlin <[email protected] <javascript:>> > wrote: > > In the olden days (API v1) I used to add views to maps, and tag the > views > > with their ids (from my database). Then I could find them on the map via > > their tag. > > > > Now in the v2 API there seems no way to add views. The closest I can see > is > > to use groundoverlays. The documentation says they have an ID that I can > > fetch via getId(). But I can't find anywhere how to SET the id. The > same > > applies to markers too. > > > > The reason for tagging markers/overlays is to be able to avoid adding > them > > again if they are already on the map, and to have the option to remove > them > > again later. I cannot keep individual assignments as I have thousands of > > markers that could be placed on the maps (I do database queries > depending on > > the camera position and span etc) > > > > So how can I set the id of a marker or ground overlay when adding them > to > > the map? > > > > -- > > 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]<javascript:> > > To unsubscribe from this group, send email to > > [email protected] <javascript:> > > For more options, visit this group at > > http://groups.google.com/group/android-developers?hl=en > > > > -- > Mark Murphy (a Commons Guy) > http://commonsware.com | http://github.com/commonsguy > http://commonsware.com/blog | http://twitter.com/commonsguy > > Här kan du ställa och svara på frågor om applikationsutveckling på > Android: http://www.andglobe.com > -- 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
