bounding the lat lng with osmdroid similar to LatLngBounds in google maps

北城余情 提交于 2019-12-02 10:28:39

Google Maps LatLngBounds becomes BoundingBox in osmdroid (more or less).

It has no direct equivalent to the LatLngBounds.including method (yes, could be a good idea to implement this one).

But BoundingBox.fromGeoPoints covers a lot of needs.

{ 
IGeoPoint screenTopLeft = mapView.getProjection().fromPixels(0, 0);
            IGeoPoint screenTopRight = mapView.getProjection().fromPixels(mapView.getWidth(), 0);
            IGeoPoint screenBottomLeft = mapView.getProjection().fromPixels(0, mapView.getHeight());
            List<IGeoPoint> iGeoPoints = new ArrayList<>();
            iGeoPoints.add(screenTopRight);
            iGeoPoints.add(screenTopLeft);
            iGeoPoints.add(screenBottomLeft);
            BoundingBox boundingBox = BoundingBox.fromGeoPoints(iGeoPoints);
            if (boundingBox.contains(currentLocation.getLatitude(), currentLocation.getLongitude())) {
                return true;
            } else {
                return false;
            }
        }

This will check whether current location is under bound or not.

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