Use a thumbnail as a placeholder for Picasso

Question

From the UX point of view, it will be great to show the user a thumbnail first until the real image completes loading, then showing it to him, but Picasso uses only a resource f

Answer 1

Thanks to raveN here & the comments on the original request on github, finally I've got a working solution:

Picasso.with(context)
       .load(thumb) // thumbnail url goes here
       .into(imageView, new Callback() {
            @Override
            public void onSuccess() {
                Picasso.with(context)
                        .load(url) // image url goes here
                        .placeholder(imageView.getDrawable())
                        .into(imageView);
            }
            @Override
            public void onError() {

            }
        });

The trick here is to get the drawable from the imageView (which is the thumbnail) after the first call & pass it as a placeholder to the second call

-- update --

I've made a blog post describing the whole scenario