Download Amazon S3 Stored Image by Picasso

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.