ViewSwitcher prelaoding

Question

I'm currently working on a slideshow-app which displays multiple images with animation in a own implementation of ImageSwitcher. Before the ImageSwitcher gets displayed, I preload (cache) the images with Picasso with fetch().

The following method will be called when the next image should load:

public void setImageSource(final String url) {
    final ImageView image = (ImageView) this.getNextView();
    image.setVisibility(View.VISIBLE);

    BitmapDrawable drawable = (BitmapDrawable) image.getDrawable();
    if (drawable != null && drawable.getBitmap() != null) {
        drawable.getBitmap().recycle();
    }

    PicassoUtils.getPicassoWithBasicAuthorizationFrom(user, getContext())
            .load(url)
            .noFade()
            .fit()
            .centerCrop()
            .into(image);

    showNext();
}

The image.setVisibility(View.VISIBLE) is needed to make picasso able to read the dimensions of the ImageView. And the recycling is needed to save memory, because when I do not do recycle the imageView the memory rises on every image switch.

But I have a big problem. The time between images is fixed and Picasso takes some time to load the image (even from the local cache) into the imageView, so I have a small delay.

The question is, how can I preload the next image?