Drag Polyline onMarkerDrag Android Google Maps v2

Question

I\'m currently developing an android application that would allow users to draw Polylines with Markers on the map. Right now, I would like to implement a feature whereby the pol

Answer 1

At first make Polyline drawRoute a field instead of a local variable. Then you can update the polyline inside onMarkerDragEnd by calling drawRoute.setPoints(arrayPoints).

Then you need in addition a Java-Map, which keeps track of which marker was responsible for which point in the array. The map would have the marker-ID as key and the array-index as value. (You get the marker ID from the marker which is returned by map.addMarker) When a marker is dragged, you can find out the index of the corresponding Point in arrayPoints using the marker-ID and said Java-Map. With that, you can exchange the point in the array and call drawRoute.setPoints again.