用 Aws-Android-SDK 连接 S4

def aws_version = '2.64.0'
implementation "com.amazonaws:aws-android-sdk-s3:$aws_version"
implementation ("com.amazonaws:aws-android-sdk-mobile-client:$aws_version")

fun getS3Client(): AmazonS3Client {
    val credentials = object: AWSCredentials {
        override fun getAWSAccessKeyId() = accessKey // 请到控制台创建子账户，并为子账户创建相应 accessKey
        override fun getAWSSecretKey() = sercetKey // ！！切记，创建子账户时，需要手动为其分配具体权限！！
    }
    val amazonS3Client = AmazonS3Client(credentials, Region.getRegion(Regions.DEFAULT_REGION), ClientConfiguration())
    amazonS3Client.endpoint = "https://s3.bitiful.net" // 请填入控制台 “Bucket 设置” 页面底部的 “Endpoint” 标签中的信息
    return amazonS3Client
}

val s3 = getS3Client()
s3.listObjects(bucketName)

val s3 = getS3Client()
val url = s3.generatePresignedUrl(bucketName, key, date)