How lazy to upload image url in google maps markers icon

Question

I am using the google maps utility demo code and changing the use of Picasso to upload an image.

My question is this:

Picasso cannot upload image and use placeholder image

After zooming in and out, update the marker. Image can be uploaded

My question is with this Google Map V2 Lazy loading marker image But I can not get help from the answer I am stuck on Bitmap bitmap = thumbCache.get(url); . I am also trying to execute a Picasso onSuccess callback, but I can also suck it.

How to update the manufacturer icon when loading the url is complete? I can use another URL image downloader library.

/**
 * Draws profile photos inside markers (using IconGenerator).
 * When there are multiple people in the cluster, draw multiple photos (using MultiDrawable).
 */
private class PersonRenderer extends DefaultClusterRenderer<Person> {
    private final IconGenerator mIconGenerator = new IconGenerator(getApplicationContext());
    private final IconGenerator mClusterIconGenerator = new IconGenerator(getApplicationContext());
    private final ImageView mImageView;
    private final ImageView mClusterImageView;
    private final int mDimension;

    public PersonRenderer() {
        super(getApplicationContext(), getMap(), mClusterManager);

        View multiProfile = getLayoutInflater().inflate(R.layout.multi_profile, null);
        mClusterIconGenerator.setContentView(multiProfile);
        mClusterImageView = (ImageView) multiProfile.findViewById(R.id.image);

        mImageView = new ImageView(getApplicationContext());
        mDimension = (int) getResources().getDimension(R.dimen.custom_profile_image);
        mImageView.setLayoutParams(new ViewGroup.LayoutParams(mDimension, mDimension));
        int padding = (int) getResources().getDimension(R.dimen.custom_profile_padding);
        mImageView.setPadding(padding, padding, padding, padding);
        mIconGenerator.setContentView(mImageView);
    }

    @Override
    protected void onBeforeClusterItemRendered(Person person, MarkerOptions markerOptions) {
        // Draw a single person.
        // Set the info window to show their name.

        Picasso.with(getApplicationContext())
                .load(person.profileUrl)
                .placeholder(R.drawable.ic_launcher)
                .error(R.drawable.ic_launcher)
                .resize(64, 64)
                .centerCrop()
                .into(mImageView);

        Bitmap icon = mIconGenerator.makeIcon();
        markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon)).title(person.name);
    }

    @Override
    protected void onBeforeClusterRendered(Cluster<Person> cluster, MarkerOptions markerOptions) {
        // Draw multiple people.
        // Note: this method runs on the UI thread. Don't spend too much time in here (like in this example).
        List<Drawable> profilePhotos = new ArrayList<Drawable>(Math.min(4, cluster.getSize()));
        int width = mDimension;
        int height = mDimension;

        for (Person p : cluster.getItems()) {
            // Draw 4 at most.
            if (profilePhotos.size() == 4) break;
            ImageView cImageView = new ImageView(getBaseContext());

            Picasso.with(getApplicationContext())
                    .load(p.profileUrl)
                    .placeholder(R.drawable.ic_launcher)
                    .error(R.drawable.ic_launcher)
                    .resize(64, 64)
                    .centerCrop()
                    .into(cImageView);

            Drawable drawable = cImageView.getDrawable();
            drawable.setBounds(0, 0, width, height);
            profilePhotos.add(drawable);

        }
        MultiDrawable multiDrawable = new MultiDrawable(profilePhotos);
        multiDrawable.setBounds(0, 0, width, height);

        mClusterImageView.setImageDrawable(multiDrawable);
        Bitmap icon = mClusterIconGenerator.makeIcon(String.valueOf(cluster.getSize()));
        markerOptions.icon(BitmapDescriptorFactory.fromBitmap(icon));
    }