从Amazon S3下载图像时如何使用Picasso库? [英] How do use use Picasso library while downloading images from Amazon S3?

问题描述

我将图像存储在Amazon S3上.我使用以下代码从Amazon S3下载图像

I am storing my images on Amazon S3. I use the following code to download image from Amazon S3

 S3ObjectInputStream content = s3Client.getObject("bucketname", url).getObjectContent();
                byte[] bytes ;
                bytes = IOUtils.toByteArray(content);
                bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
                bitmap = Bitmap.createScaledBitmap(bitmap, width, height, true);
                bitmap = CommonUtilities.getRoundedCornerBitmap(bitmap, 30);
                cache.put(url, new SoftReference<Bitmap>(bitmap));
                return bitmap;

在阅读毕加索文档时，我读到了加载我们只需要做的图像

While going through Picasso documentation, I read that to load images we simply need to do

Picasso.with(context).load("http://i.imgur.com/DvpvklR.png").into(imageView);

那么如何通过毕加索下载Amazon S3图像.

So how to download Amazon S3 images through Picasso.

推荐答案

您可以使用使用适用于Java的AWS开发工具包生成预签名对象URL ".尽管该示例适用于Java SDK，但适用于AWS Android SDK.

You can use AmazonS3.generatePresignedUrl(String, String, Date) to generate a presigned url and pass it to Picasso. Here is an example "Generate a Pre-signed Object URL using AWS SDK for Java". Though the example is for the Java SDK, it's applicable for the AWS Android SDK.

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