Can “overlay” size be zoomed together with the google map on android?

Question

I have been able to use \"MapActivity\" and \"ItemizedOverlay\" to draw overlays on google maps on android with Eclipse. But when the map is zooming in and out, the overlay does

Answer 1

After a bit of looking around, I came up with the following answer (I used code from this blog to do the resizing).

I overrode the same method used above, with some differences:

• Instead of the drawCircle method I used the drawBitmap method
• I didn't use the Paint object
• I cycled over the overlay items to resize the markers

It ends up like this:

 for(OverlayItem currentPoint:mOverlays){
        geopoint =currentPoint.getPoint();
        Point point = new Point();
        projection.toPixels(geopoint, point);                       
        BitmapDrawable bitDraw= ((BitmapDrawable)currentPoint.getMarker(0));
        Drawable currentMarker = currentPoint.getMarker(0);
        /*if (currentMarker!=null){

            if (currentWidthRatio<.6f) {                
                currentWidthRatio = .6f;                    
            }
            else if (currentWidthRatio>1.5f) {
                currentWidthRatio = 1.5f;
            }
        }*/

        if (bitDraw!=null){         
        Bitmap bitmap = getResizedBitmap(bitDraw.getBitmap(),(int)(currentMarker.getIntrinsicHeight() * currentWidthRatio),
                (int)(currentMarker.getIntrinsicWidth()*currentWidthRatio));

        canvas.drawBitmap(bitmap,
                point.x - bitmap.getHeight()/2,
                point.y - bitmap.getWidth()/2, null);
        }else{
            Log.println(Log.DEBUG,"non-existent point", "");
        }
  }

Careful, though! The currentPoint.getMarker(0) method gets, as its name implies, the current marker's data. That means you have its original size, not the way it has grown (or shrunk) since. You have to have some method to:

• store the original size of the map
• verify how it has changed since (ratio)

The code I commented out handles the maximum and minimum resizing I want to allow (so the markers can be seen without overlapping / remain legible to the human eye).

I hope this helps!