Snippet to Connect to Amazon S3

AmazonS3

 String filePath = "PATH_TO_FILE"; // the path of the image/path you want to upload.
    File file = new File(filePath);

    String MY_PICTURE_BUCKET = "BUCKET_NAME"; //the name of the bucket you want to create. This  name must be unique

    String MY_IDENTITY_POOL_ID = "IDENTITY_POOL_ID"; //the id you just got from cognito console.
                        
    CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider(
                                    MainActivity.this, // Application Context
                                    MY_IDENTITY_POOL_ID, // Identity Pool ID
                                    Regions.US_EAST_1 // Region enum
                            );
    AmazonS3Client s3Client = new AmazonS3Client(credentialsProvider);
    if (!s3Client.doesBucketExist(MY_PICTURE_BUCKET)) { //bucket names must be unique.
            s3Client.createBucket(MY_PICTURE_BUCKET);
    }
    String MY_PICTURE_NAME = file.getName();
//This will upload the file with the fileName
    PutObjectRequest por = new PutObjectRequest(MY_PICTURE_BUCKET, MY_PICTURE_NAME, file);
    if (!s3Client.doesObjectExist(MY_PICTURE_BUCKET, MY_PICTURE_NAME)) { //object name must be unique.
            s3Client.putObject(por);
    }
    
    //This will fetch the object with the fileName in the bucketName. This snippet assumes that the file coming is an image.
    GetObjectRequest gor = new GetObjectRequest(bucketName, fileName);
        Bitmap bmp = null;
        if (s3Client.doesObjectExist(bucketName, fileName)) {
            try {
                S3Object getResponse = s3Client.getObject(gor);
                InputStream is = getResponse.getObjectContent();
                bmp = BitmapFactory.decodeStream(is);
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }