图片上传亚马逊s3 android SDK 2.0

我想将图像上传到android中的amazon s3存储桶.我没有得到任何错误,但只是没有工作可以有人帮助我吗？我找不到任何关于此的好例子或问题.

我将图像分配给'文件images3'

images3 = new File(uri.getPath());

public void addEventToDB(){

        Thread thread = new Thread()
        {
            @Override
            public void run() {
                try {
                    CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider(
                            getActivity().getApplicationContext(), // get the context for the current activity
                            "...",
                            "us-east-1:...",
                            "arn:aws:iam::...:role/Cognito_WitpaAuth_DefaultRole",
                            "arn:aws:iam::...:role/Cognito_WitpaAuth_DefaultRole",
                            Regions.US_EAST_1
                    );

                    String bucket_name = "witpa";
                    String key = "images.jpeg";

                    TransferManager transferManager = new TransferManager(credentialsProvider);
                    transferManager.upload(bucket_name, key, images3);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };

        thread.start();

    }

我创建了我的存储桶,在我设置的权限中,每个人都可以写和读.

在amazon cognito中,我只是将一切都保留为默认值.

谁知道我怎么能让这个工作？