How to change the position of a Marker on a Android Map v2

Question

I need to do the following: I have a Marker on the map and I need to change the position of it. So I tried the following:

MarkerOptions a = new MarkerOptions()             .position(new LatLng(50,6)));         map.addMarker(a);         a.position(new LatLng(50,5)); 

where map is a GoogleMap. I think I have to refresh the map or somthing equal?

Answer 1

Found the solution, Need to do it like this:

MarkerOptions a = new MarkerOptions()     .position(new LatLng(50,6))); Marker m = map.addMarker(a); m.setPosition(new LatLng(50,5)); 

Answer 2

There's one example of moving marker in google map v2 demo app .. In file adt-bundle-linux/sdk/extras/google/google_play_services/samples/maps/src/com/exa‌​mple/mapdemo/MarkerDemoActivity.java (4.2.2 examples)

Here the code for moving a marker:

public void animateMarker(final Marker marker, final LatLng toPosition, final boolean hideMarker) {     final Handler handler = new Handler();     final long start = SystemClock.uptimeMillis();     Projection proj = mGoogleMapObject.getProjection();     Point startPoint = proj.toScreenLocation(marker.getPosition());     final LatLng startLatLng = proj.fromScreenLocation(startPoint);     final long duration = 500;      final Interpolator interpolator = new LinearInterpolator();      handler.post(new Runnable() {         @Override         public void run() {             long elapsed = SystemClock.uptimeMillis() - start;             float t = interpolator.getInterpolation((float) elapsed                     / duration);             double lng = t * toPosition.longitude + (1 - t)                     * startLatLng.longitude;             double lat = t * toPosition.latitude + (1 - t)                     * startLatLng.latitude;             marker.setPosition(new LatLng(lat, lng));              if (t < 1.0) {                 // Post again 16ms later.                 handler.postDelayed(this, 16);             } else {                 if (hideMarker) {                     marker.setVisible(false);                 } else {                     marker.setVisible(true);                 }             }         }     }); } 

This code will animate the marker from one geopoint to another.