Have you ever wanted to use Square's Picasso Android library to download images stored on the Amazon S3 and secured by IAM? It's simple - just set up your AmazonS3Client, create the new S3Downloader instance and pass it to the Picasso.Builder like so:

final AmazonS3Client client = new AmazonS3Client(getCredentialsProvider()); new Picasso.Builder(getApplicationContext()) .downloader(new S3Downloader( s3client, context, "your-image-bucket" )) .build() .load(getImagePath()) .into(image);

That's it.

Fixes, PRs and such are highly appreciated.