Android Amazon s3 存储桶

Question

如何从特定文件夹中的 Amazon Web Services S3 存储桶下载文件。

截至目前，我在我的 android studio 中导入 amazon transfer Utility 项目示例，它工作正常没问题，但每当我从 AWS-S3 存储桶下载文件时，文件下载到默认外部存储位置。 因此，我希望将文件下载到特定文件夹中，例如 storage/folder_name/file_name.txt

Answer 1

您可以使用AWS SDK 将文件下载到您想要的任何位置。 或者使用 CLI 工具，例如 AWS CLI 或 s3cmd

Answer 2

试试这个..我在我的项目中使用它能够将图像下载到特定文件夹..

 File imageImage = new File(mContext.getDir(USER_PROFILE_DIRECTORY, Context.MODE_PRIVATE)+ ImageName).getAbsoluteFile();
 Download(checkImage,Constants.AMAZON_BUCKET_IMAGE,ImageName);

/**
 * To download the image from the Amazon S3 bucket and store the image locally to the particular directory
 * @param DownloadingImagePath Source path of the image file to be stored
 * @param ImageName Image file name / Object key of Amazon S3
 * @param ImageBucket Amazon S3 bucket name
*/
public void Download(File DownloadingImagePath,String ImageBucket,String ImageName){
try{
      AWSCredentials credentials = new BasicAWSCredentials(ACCESS_KEY, SECRET_KEY);
      AmazonS3 s3 = new AmazonS3Client(credentials);
                java.security.Security.setProperty("networkaddress.cache.ttl" , "60");
                s3.setRegion(Region.getRegion(Regions.AP_SOUTHEAST_1));
                s3.setEndpoint("https://s3-ap-southeast-1.amazonaws.com/");
                TransferUtility transferUtility = new TransferUtility(s3, mContext);
                TransferObserver observer = transferUtility.download(ImageBucket, ImageName, DownloadingImagePath);
                observer.setTransferListener(new TransferListener() {
                    @Override
                    public void onStateChanged(int id, TransferState state) {
                        //Log.e("Amazon Stats",state.name());
                    }

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

                    }

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

                    }
                });
                } catch (Exception ignored){
            }
        }