让overlayItems全部显示
如果有时间加了很多overlayItem，由于缩放问题 有些不能显示为了全部显示
public void centerOverlays() { int minLat = 81 * MapStoresController.MAP_SCALE; int maxLat = -81 * MapStoresController.MAP_SCALE; int minLon = 181 * MapStoresController.MAP_SCALE; int maxLon = -181 * MapStoresController.MAP_SCALE; for (int i = 0; i < overlayItems.size(); i++) { Store s = overlayItems.getItem(i).getStore(); minLat = (int) ((minLat > (s.getLocation().getLatitude() * MapStoresController.MAP_SCALE)) ? s.getLocation().getLatitude() * MapStoresController.MAP_SCALE : minLat); maxLat = (int) ((maxLat < (s.getLocation().getLatitude() * MapStoresController.MAP_SCALE)) ? s.getLocation().getLatitude() * MapStoresController.MAP_SCALE : maxLat); minLon = (int) ((minLon > (s.getLocation().getLongitude() * MapStoresController.MAP_SCALE)) ? s.getLocation().getLongitude() * MapStoresController.MAP_SCALE : minLon); maxLon = (int) ((maxLon < (s.getLocation().getLongitude() * MapStoresController.MAP_SCALE)) ? .getLocation().getLongitude() * MapStoresController.MAP_SCALE : maxLon); } GeoPoint gp = controller.getUserLocation(); minLat = (minLat > gp.getLatitudeE6()) ? gp.getLatitudeE6() : minLat; maxLat = (maxLat < gp.getLatitudeE6()) ? gp.getLatitudeE6() : maxLat; minLon = (minLon > gp.getLongitudeE6()) ? gp.getLongitudeE6() : minLon; maxLon = (maxLon < gp.getLongitudeE6()) ? gp.getLongitudeE6() : maxLon; mapView.getController().zoomToSpan((maxLat - minLat), (maxLon - minLon)); mapView.getController().animateTo(new GeoPoint((maxLat + minLat) / 2, (maxLon + minLon) / 2)); } ?
2.
/** * Fits the map with the passed in points so all points are visible. * @param mapController MapView controller * @param points list of points you want the map to contain */private static void fitPoints(MapController mapController, List points) { // set min and max for two points int nwLat = -90 * 1000000; int nwLng = 180 * 1000000; int seLat = 90 * 1000000; int seLng = -180 * 1000000; // find bounding lats and lngs for (GeoPoint point : points) {nwLat = Math.max(nwLat, point.getLatitudeE6()); nwLng = Math.min(nwLng, point.getLongitudeE6());seLat = Math.min(seLat, point.getLatitudeE6()); seLng = Math.max(seLng, point.getLongitudeE6()); } GeoPoint center = new GeoPoint((nwLat + seLat) / 2, (nwLng + seLng) / 2); // add padding in each direction int spanLatDelta = (int) (Math.abs(nwLat - seLat) * 1.1); int spanLngDelta = (int) (Math.abs(seLng - nwLng) * 1.1); // fit map to points mapController.animateTo(center); mapController.zoomToSpan(spanLatDelta, spanLngDelta);}?