如何控制捏缩放，缩小Android中的地图？

Question

In my Android app I've a MapActivity where, when zooming the map with two fingers (pinch) it's zooming, but when I lift the fingers it's zooming further. Meaning, if London is centered on the map, when I am zooming London reaches the edges of the screen; when I lift the fingers, it is going out of screen, zooming further. I want it like iOS map app (No further zooming). How can I do this?

I tried the following code but did not work.

class MapOvelay extends Overlay {
   boolean moveTouch;
   int i;

    @Override
    public boolean onTouchEvent(MotionEvent event, MapView mapView) {
       switch (event.getAction()) {     
         case MotionEvent.ACTION_POINTER_UP://when two fingers are lifted
           mapController.setZoom(i);
           i=0;
           break;

         case MotionEvent.ACTION_MOVE://when two fingers are moving on map
           i = mapView.getZoomLevel();
           moveTouch = true;
           break;
   .... 
  }
 }
}

Answer 1

Have you tried the zoomToSpan-functionality?

mMapController.zoomToSpan(maxLatitude - minLatitude,maxLongitude - minLongitude);

Also, you can restrict lowest zoom with something like this

if (LOWEST_ZOOM_LEVEL < mMap.getZoomLevel() ) {
    mMapController.setZoom(LOWEST_ZOOM_LEVEL);
}

Answer 2

You can get the maximum zoom level available by calling #getMaxZoomLevel() in your MapView. That's the closest zoom you will be able to get, no matter what happens in the official Google Maps application. mapView.getController().animateTo(geoPoint); mapView.getController().setZoom(15); mapView.invalidate();

Answer 3

Try this

    mapview.getController().animateTo(startGP);
    mapview.getController().setZoom(13);        
    mapview.setBuiltInZoomControls(true);
    mapview.invalidate();