MarkerExample.java

// Add a marker for each point in a list of vectors
private void insertClusteredMarkers(List<VectorObject> vectors, MaplyBaseController inController)
{
    // The markers will be 32x32 pixels
    Point2d size = new Point2d(32, 32);
    List<ScreenMarker> markers = new ArrayList<>();
    Bitmap icon = BitmapFactory.decodeResource(getActivity().getResources(), R.drawable.sticker);

    // For each vector object, add a marker in the middle
    for (VectorObject v : vectors) {
        ScreenMarker marker = new ScreenMarker();
        marker.image = icon;
        marker.loc = v.centroid();
        marker.size = size;
        marker.selectable = true;

        if (marker.loc != null)
            markers.add(marker);
    }

    // Invoke the layout engine and ask the markers to cluster
    MarkerInfo info = new MarkerInfo();
    info.setLayoutImportance(1.f);
    info.setClusterGroup(0);

    // Add all the markers at once
    inController.addScreenMarkers(markers, info, MaplyBaseController.ThreadMode.ThreadCurrent);
}