AddCircle method for map, support modify radius of circle

[Trinea]

Like below, we need add circle on the map, so we can change the radius constantly to make a animation.

[Trinea]

@jjhurlock

[jjhurlock]

@Trinea We have a UserLocationView, that implements a similar effect here

Is this helpful to start implementing this feature?

[tobrun]

@jjhurlock while the SDK has a similar effect we are currently not exposing this as an API. This is something I have been thinking about in #3276. This will allow end developers to draw Android Views on a certain LatLng and give them the ability to do whatever they like with it.

Note that exposing this as an API has a history to it.. we prefer people using GL based markers because they are more performant and allow scaling. On the other hand these markers are very limited in what we can do with hem, for example having marker animation.

Update: just found this ticket with the history behind this: #3116

[Trinea]

ok, this is not urgent for us.

#4090
#3985
#4159

These are urgent for us, please process first, Thank you

[zugaldia]

Just noting that the request here, if I understand correctly, is to (1) receive an event callback while hovering over a previously added marker, in order to trigger some custom behavior (in this case, (2) an animation).

@tobrun is this something unlocked for view markers now that #3276 has landed?

[tobrun]

Yes,

A user should be able to track the camera position with an OnCameraChangeListener and check if the LatLng from the camera matches the location of a Marker. If it does, the user should get a reference to the related view with mapboxMap.getViewMarkerManager().getView(markerView) and should be able to execute an animation.

[tobrun]

I created some sample code on achieving this with ViewMarkers in #5346.
@bleege is running point on integrating this into the location picker example #5282.

[zugaldia]

@tobrun Great, this looks fantastic.

As discussed in #5346 (comment), @bleege is picking this code up together with the MyLocationView usecase to create a new sample activity that demoes this functionality.

@Trinea good news, this will be included in the next Android 4.1 release.

[zugaldia]

Related: #2167 (comment)

[zugaldia]

Done in #5346.

[zugaldia]

@Trinea good news, this is also completed, and it will be available in the next release of the SDK.