Android tap on map and get coordinates

Question

Hi guys I am trying to make an app that once the user taps on a map it gets the coordinates of that specific point.

Among others i have also read that: Get coordina

Answer 1

Yes. In fact, the answer I gave in that other question is what you need.

Answer 2

You will need to override onTouchEvent().

i hope following code will help u... showing using onTouchEvent() to while user lifts his finger from map...

Given the screen coordinates of the touch, you can use a Projection (from getProjection() on MapView) to convert that to latitude and longitude...

@Override
        public boolean onTouchEvent(MotionEvent event, MapView mapView) 
        {   
            GeoPoint point_touch;
            MapController map_controller=mapView.getController();
            //---when user lifts his finger---
            if (event.getAction() == event.ACTION_UP) {                
                point_touch = mapView.getProjection().fromPixels((int) event.getX(),(int) event.getY());                    
                Log.i("Cordinates","Lattitude="+point_touch.getLatitudeE6() / 1E6 
                        +" Longitude="+point_touch.getLongitudeE6() /1E6  );
                map_controller.animateTo(point_touch);
                return true;
            }    
            else
            {
                return false;
            }

         }

Answer 3

Should be trivial with a little bit of math. You can use getLatitudeSpan() and getLongitudeSpan() to get the extents of the visible map, and getMapCenter() to see the center point. Just map that to the coordinates of the touch event.

EDIT: Mark, as always, has an even more elegant solution.