Animated Spiderfication

[Dev-iL]

Making more use of the andoid-maps-extensions as in the example introduced in v1.3 of the demo app: When clicking on a cluster markers should slide (using animation) instead of just appearing in their new place. This would probably be made this way:

• user clicks a clustered marker valid for spiderfication.
• code iterates over contained markers and saves their ClusterGroup into OmsData.
• markers are then declusterfied using: marker.setClusterGroup(ClusterGroup.DEFAULT); and animated into their new position.
• Polylines ("legs") are either drawn or not. May be animated as well.
• Zooming still unspiderfies markers instantly. unspiderfy() should now also reset the ClusterGroup back to what it was.

[Dev-iL]

Mostly done, what's left to do is to animate leg appearance.