Draw circle with centre point and clear circle when user change radius

KalpitMistry

We had developer an application in past which had integrated old Arc gis  core Android library. Now we have migrated from 10x to 100.9.0 Runtime library. And we have observed many functionality is not working due to method changed. Most of the functionality we had fixed but we are stuck at 2 functionality which is like draw circle with user centre location.

Please see my below code which I have used to draw circle.

Actually we are able to get the circle on map but it is not with the centre point which I have used. I have passed my location as param you can see in below method, the first one param.

private Graphic getCircleForMapReference(LatLng position, double radius, SpatialReference mapReference, MapView mapView) {
    int pointCount = 360;

    if (radius > 0)
    {
        Application application = ApplicationUtil.getInstance().getApplicationInstance();
        int color = application.getResources().getColor(com.cityshob.responder.R.color.investigationCircleOrange);
        Point center = LocationUtils.convertToMapPoint(position, mapReference);
        SimpleLineSymbol lineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID,color, 7);
        PointCollection pointCollection = new PointCollection(SpatialReferences.getWgs84());


        for (int i = 0; i <= pointCount; i++)
        {
            double rad = 2 * Math.PI / pointCount * i;
            double x = Math.cos(rad) * radius + center.getX();
            double y = Math.sin(rad) * radius + center.getY();

            android.graphics.Point screenPoint = new android.graphics.Point((int) Math.round(x),(int) Math.round(y));
            Point mapPoint = mapView.screenToLocation(screenPoint);
            Point wgs84Point = (Point) GeometryEngine.project(mapPoint, SpatialReferences.getWgs84());
            pointCollection.add(wgs84Point.getX(),wgs84Point.getY());
        }
        Polyline lineGeometry = new Polyline(pointCollection);
        Graphic lineGraphic = new Graphic(lineGeometry, lineSymbol);
        return lineGraphic;
    }

    return null;
}

Second issue which I am facing is to clear that circle. I used below line of code to clear but it is not working.
mGraphicsLayer.getGraphics().remove(circle)
where 
mGraphicsLayer is the object of GraphicOverlay
circle is the index where I have added object.

we are stuck on above 2 points, Please help us as soon as possible. Please let us know what we had implemented wrong.

cs.png

Power_BI_Display_Error_Bars.png

CID_3-1784270904493.png

KalpitMistry

Hi Thanks for the reply.
Can you please help me to draw circle with dynamic radius. I have my current lat/long which is centre point and through that centre point i need to draw circle for that I need to calculate x and y coordinates.  I have used below equation to calculate x and y

double rad = 2 * Math.PI / pointCount * i;
double x = Math.cos(rad) * radius + center.getX();
double y = Math.sin(rad) * radius + center.getY();

after that convert x,y to the map location using mapToLocation method, it will return me object of Point which I am adding into PointCollection object.

Please suggest me what I did wrong.