在 android 中直接使用 aws s3 将图像加载到 imageview 而无需下载到本地存储

Question

我正在使用 aws s3 从数字海洋空间加载图像，现在它将图像下载到本地存储，然后在图像视图中加载图像，但我需要直接加载图像而不是在本地下载图像

我的当前代码：

AmazonS3Client s3;
    BasicAWSCredentials credentials;
    TransferUtility transferUtility;
    final TransferObserver observer,observers;
    String key = "XXXXXXXX";
    String secret = "XXXXXXXXXXXXX";

    credentials = new BasicAWSCredentials(key, secret);
    s3 = new AmazonS3Client(credentials);
    s3.setEndpoint("https://xxx.yyyy.com");

    transferUtility = new TransferUtility(s3, getApplicationContext());
    CannedAccessControlList filePermission = CannedAccessControlList.PublicRead;

    observer = transferUtility.download(
            "xxx",
            "xxxx/01.jpg",
            new File("/storage/emulated/0/camera 1/05.jpg")
    );

    observer.setTransferListener(new TransferListener() {
        @Override
        public void onStateChanged(int id, TransferState state) {
            if (state.COMPLETED.equals(observer.getState())) {
                Toast.makeText(getApplicationContext(), "Space Download completed !!", Toast.LENGTH_LONG).show();
                Bitmap bmp = BitmapFactory.decodeFile("/storage/emulated/0/camera 1/05.jpg");
                imgview.setImageBitmap(bmp);

            }
        }

        @Override
        public void onProgressChanged(int id, long bytesCurrent, long bytesTotal) {
        }

        @Override
        public void onError(int id, Exception ex) {

            Toast.makeText(getApplicationContext(), "Space Download error: " + ex.getMessage(), Toast.LENGTH_LONG).show();
        }
    });

Answer 1

您可以使用 Picasso 从 url 加载图像。这是一个例子 -

在应用级别使用Gradle：

implementation 'com.squareup.picasso:picasso:2.71828'

使用此行从您的 url -

加载图像

Picasso.get().load("https://xxx.yyyy.com/your_image.png").into(imageView); // Your imageview

Glide也是一个解决方案

使用Gradle:

repositories {
  mavenCentral() 
  google()
}

dependencies {
   implementation 'com.github.bumptech.glide:glide:4.7.1'
   annotationProcessor 'com.github.bumptech.glide:compiler:4.7.1'
}



// For a simple view:
  Glide.with(this).load("https://xxx.yyyy.com/your_image.png").into(imageView);

Fresco 也是一个在 Android 中显示图像的强大系统，由 facebook 开发。

享受android

Answer 2

@karthikeyan 评论帮助我这里是答案：

    AmazonS3Client s3;
    BasicAWSCredentials credentials;

    String key = "xxxxx"; //SpacesKey
    String secret = "yyyyyyyyy"; //Spaces Secret key

    credentials = new BasicAWSCredentials(key, secret);
    s3 = new AmazonS3Client(credentials);

    s3.setEndpoint("https://RegionName.digitaloceanspaces.com"); //endpoint

    Date expires = new Date (new Date().getTime() + 1000 * 60); // 1 minute to expire
    GeneratePresignedUrlRequest generatePresignedUrlRequest = new GeneratePresignedUrlRequest(bucketName, objectKey);  //generating the signatured url

    generatePresignedUrlRequest.setExpiration(expires);
    URL url = s3.generatePresignedUrl(generatePresignedUrlRequest);

使用 url

使用 Picasso 或 Glide 将图像加载到图像视图

在 android 中直接使用 aws s3 将图像加载到 imageview 而无需下载到本地存储

Load image to imageview directly using aws s3 without downloading to local storage in android

java

android

amazon-web-services

android-studio

digital-ocean