android - Android 应用程序中的 AWS Amplify Cognito 身份验证错误

Question

我正在关注 Amplify 文档以将身份验证添加到我的 Android 应用程序。我收到了 AuthException在这条线上:

Amplify.addPlugin(AWSCognitoAuthPlugin())

我确实创建了一个用户池。我需要以某种方式附加它吗？ AWSMobileClient 有问题， 我猜。
这是我的 Application类(class):

class AppUtils : Application() {
    override fun onCreate() {
        super.onCreate()
        try {
            Amplify.addPlugin(AWSCognitoAuthPlugin())
            Amplify.configure(applicationContext)
            Log.d(TAG, "Initialized Amplify")
        } catch (error: AmplifyException) {
            Log.e(TAG, "Could not initialize Amplify", error)
        }
    }
}

这是显示在 logcat 中的错误:

AuthException{message=Failed to instantiate AWSMobileClient, cause=java.lang.RuntimeException: Neither Cognito Identity or Cognito UserPool was used. At least one must be present to use AWSMobileClient., recoverySuggestion=See attached exception for more details}

Answer 1

该错误表明在您的配置文件中没有找到 Identity 或 UserPool。
首先确保您已完成以下步骤:

放大初始化

放大添加身份验证

放大推

完成后，您应该有一个 amplifyconfiguration.json和 awsconfiguration.json在您的 app/src/main/res/raw目录。
您的 amplifyconfiguration.json应该是这样的:

{
    "UserAgent": "aws-amplify-cli/2.0",
    "Version": "1.0",
    "auth": {
        "plugins": {
            "awsCognitoAuthPlugin": {
                "UserAgent": "aws-amplify-cli/0.1.0",
                "Version": "0.1.0",
                "IdentityManager": {
                    "Default": {}
                },
                "CredentialsProvider": {
                    "CognitoIdentity": {
                        "Default": {
                            "PoolId": "us-east-1:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
                            "Region": "us-east-1"
                        }
                    }
                },
                "CognitoUserPool": {
                    "Default": {
                        "PoolId": "us-east-1_xxxxxxxxx",
                        "AppClientId": "xxxxxxxxxxxxxxxxxxxxxxxxxx",
                        "AppClientSecret":
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
                        "Region": "us-east-1"
                    }
                },
                "Auth": {
                    "Default": {
                        "authenticationFlowType": "USER_SRP_AUTH"
                    }
                }
            }
        }
    }
}

您的 awsconfiguration.json应该是这样的:

{
    "UserAgent": "aws-amplify-cli/0.1.0",
    "Version": "0.1.0",
    "IdentityManager": {
        "Default": {}
    },
    "CredentialsProvider": {
        "CognitoIdentity": {
            "Default": {
                "PoolId": "us-east-1:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
                "Region": "us-east-1"
            }
        }
    },
    "CognitoUserPool": {
        "Default": {
            "PoolId": "us-east-1_xxxxxxxxx",
            "AppClientId": "xxxxxxxxxxxxxxxxxxxxxxxxxx",
            "AppClientSecret":
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
            "Region": "us-east-1"
        }
    },
    "Auth": {
        "Default": {
            "authenticationFlowType": "USER_SRP_AUTH"
        }
    }
}