Amazon web services 在Android中使用以下代码时，无法从链中的任何提供商加载AWS凭据

String cognitoIdentityId=sp.getString（“aws_identity”，”）； 字符串openIdToken=sp.getString（“aws_-token”，”）

Map logins=newhashmap（）；
logins.put（“cognito identity.amazonaws.com”，openIdToken）；
GetCredentialsForIdentity请求getCredentialsRequest=
新GetCredentialsForIdentityRequest（）
.withIdentityId（cognitoIdentityId）
.具有登录名（登录名）；
AmazonCongnitoIdentityClient cognitoIdentityClient=新的AmazonCongnitoIdentityClient（）；
GetCredentialsForIdentityResult getCredentialsResult=cognitoIdentityClient.getCredentialsForIdentity（getCredentialsRequest）；
凭证凭证=getCredentialsResult.getCredentials（）；
AWSSessionCredentials sessionCredentials=新的基本会话凭据(
credentials.getAccessKeyId（），
credentials.getSecretKey（），
credentials.getSessionToken（）
);

错误与语法有关 正确的代码是

cognitoIdentityId = sp.getString("aws_identity", "");
            String openIdToken = sp.getString("aws_token", "");

            Map<String, String> logins = new HashMap<>();
            logins.put("cognito-identity.amazonaws.com", openIdToken);
            GetCredentialsForIdentityRequest getCredentialsRequest =
                    new GetCredentialsForIdentityRequest()
                            .withIdentityId(cognitoIdentityId)
                            .withLogins(logins);
            AmazonCognitoIdentityClient cognitoIdentityClient = new AmazonCognitoIdentityClient(new AnonymousAWSCredentials());
            GetCredentialsForIdentityResult getCredentialsResult = cognitoIdentityClient.getCredentialsForIdentity(getCredentialsRequest);
            Credentials credentials = getCredentialsResult.getCredentials();
            AWSSessionCredentials sessionCredentials = new BasicSessionCredentials(
                    credentials.getAccessKeyId(),
                    credentials.getSecretKey(),
                    credentials.getSessionToken()
            );

            AWS_KEY = sessionCredentials.getAWSAccessKeyId();
            AWS_SECRET = sessionCredentials.getAWSSecretKey();
            AWS_SESSION = sessionCredentials.getSessionToken();

cognitoIdentityId=sp.getString（“aws_identity”，”）；
字符串openIdToken=sp.getString（“aws_-token”，”）；
Map logins=new HashMap（）；
logins.put（“cognito identity.amazonaws.com”，openIdToken）；
GetCredentialsForIdentity请求getCredentialsRequest=
新GetCredentialsForIdentityRequest（）
.withIdentityId（cognitoIdentityId）
.具有登录名（登录名）；
AmazonCongnitoIdentityClient cognitoIdentityClient=新的AmazonCongnitoIdentityClient（新的匿名AWSCredentials（））；
GetCredentialsForIdentityResult getCredentialsResult=cognitoIdentityClient.getCredentialsForIdentity（getCredentialsRequest）；
凭证凭证=getCredentialsResult.getCredentials（）；
AWSSessionCredentials sessionCredentials=新的基本会话凭据(
credentials.getAccessKeyId（），
credentials.getSecretKey（），
credentials.getSessionToken（）
);
AWS_KEY=sessionCredentials.getAWSAccessKeyId（）；
AWS_SECRET=sessionCredentials.getAWSSecretKey（）；
AWS_SESSION=sessionCredentials.getSessionToken（）；

您遇到了什么错误？“无法从链中的任何提供商加载AWS凭据”是一个确切的例外@juansebastian您得到了哪一个是有问题的行？我怀疑您没有有效的访问密钥id和密钥加载到您的代码中，因此您无法访问aws资源。

cognitoIdentityId = sp.getString("aws_identity", "");
            String openIdToken = sp.getString("aws_token", "");

            Map<String, String> logins = new HashMap<>();
            logins.put("cognito-identity.amazonaws.com", openIdToken);
            GetCredentialsForIdentityRequest getCredentialsRequest =
                    new GetCredentialsForIdentityRequest()
                            .withIdentityId(cognitoIdentityId)
                            .withLogins(logins);
            AmazonCognitoIdentityClient cognitoIdentityClient = new AmazonCognitoIdentityClient(new AnonymousAWSCredentials());
            GetCredentialsForIdentityResult getCredentialsResult = cognitoIdentityClient.getCredentialsForIdentity(getCredentialsRequest);
            Credentials credentials = getCredentialsResult.getCredentials();
            AWSSessionCredentials sessionCredentials = new BasicSessionCredentials(
                    credentials.getAccessKeyId(),
                    credentials.getSecretKey(),
                    credentials.getSessionToken()
            );

            AWS_KEY = sessionCredentials.getAWSAccessKeyId();
            AWS_SECRET = sessionCredentials.getAWSSecretKey();
            AWS_SESSION = sessionCredentials.getSessionToken();