Android Google Map custom marker load image from URL

Question

Hello im using google map api v2, and i have created custom marker class named FirmaMarker, and i want to display it with image from URL that im getting from database.
Im using Picasso to load image, but problem is that marker is created before image is fetched so i just get markers created without image, and user need to reopen activity few times so images actually get fetched and appear.

Here is custom marker renderer class

public class FirmaRenderer extends DefaultClusterRenderer<FirmaMarker> {

private final IconGenerator iconGenerator;
private final ImageView slika;
private final int width;
private final int height;
private Marker marker;
private MarkerOptions mOptions;
private Context context;

public FirmaRenderer(Context context, GoogleMap map, ClusterManager<FirmaMarker> clusterManager, int width, int height) {
    super(context, map, clusterManager);
    this.width = width;
    this.height = height;
    this.context = context;

    iconGenerator = new IconGenerator(context.getApplicationContext());
    slika = new ImageView(context.getApplicationContext());
    slika.setLayoutParams(new ViewGroup.LayoutParams(width,height));
    slika.setPadding(5,5,5,5);
    iconGenerator.setContentView(slika);
}
@Override
protected void onBeforeClusterItemRendered(FirmaMarker item, MarkerOptions markerOptions) {
    Picasso.get().load(item.getSlika()).fetch();
    Bitmap icon = iconGenerator.makeIcon();
    markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon)).title(item.getTitle());
    Picasso.get().load(item.getSlika()).into(slika);
}

@Override
protected boolean shouldRenderAsCluster(Cluster<FirmaMarker> cluster) {
    return false;
}}

And how i create markers in main activity

        if(Map != null)
    {
        if(clusterManager == null)
        {
            clusterManager = new ClusterManager<FirmaMarker>(this,Map);
        }
        if(firmaRenderer == null)
        {
            firmaRenderer= new FirmaRenderer(
                    this,
                    Map,
                    clusterManager,
                    160,
                    100
            );
            clusterManager.setRenderer(firmaRenderer);
        }
        for(int i=0;i<FirmaID.size();i++)
        {
            FirmaMarker marker = new FirmaMarker(
                    new LatLng(Double.parseDouble(Sirina.get(i)), Double.parseDouble(Duzina.get(i))),
                    Naziv.get(i),
                    "Притисните за више информација",
                    LinkSlike.get(i),
                    Integer.parseInt(FirmaID.get(i))
            );
            clusterManager.addItem(marker);
            Markeri.add(marker);
        }
        clusterManager.cluster();
    }