由于Keystore异常，亚马逊DynamoDB未连接

Question

我有一个安卓应用程序上传一些字符串到亚马逊DynamoDB表。此应用程序使用cognitoUnauthenticated池。当我尝试将我的应用程序与亚马逊DynamoDB连接时，我得到了以下异常

E/KeyProvider23: Error in deleting the key for keyAlias: com.amazonaws.android.auth.aesKeyStoreAlias from Android KeyStore.
    java.security.KeyStoreException: Failed to delete entry: com.amazonaws.android.auth.aesKeyStoreAlias
        at android.security.keystore.AndroidKeyStoreSpi.engineDeleteEntry(AndroidKeyStoreSpi.java:879)
        at java.security.KeyStore.deleteEntry(KeyStore.java:1257)
        at com.amazonaws.internal.keyvaluestore.KeyProvider23.deleteKey(KeyProvider23.java:118)
        at com.amazonaws.internal.keyvaluestore.AWSKeyValueStore.retrieveEncryptionKey(AWSKeyValueStore.java:493)
        at com.amazonaws.internal.keyvaluestore.AWSKeyValueStore.get(AWSKeyValueStore.java:226)
        at com.amazonaws.auth.CognitoCachingCredentialsProvider.getCachedIdentityId(CognitoCachingCredentialsProvider.java:577)
        at com.amazonaws.auth.CognitoCachingCredentialsProvider.initialize(CognitoCachingCredentialsProvider.java:433)
        at com.amazonaws.auth.CognitoCachingCredentialsProvider.<init>(CognitoCachingCredentialsProvider.java:195)
        at com.mysample.servicesample.AmazonClientManager.lambda$initClients$0$AmazonClientManager(AmazonClientManager.java:40)
        at com.mysample.servicesample.-$$Lambda$AmazonClientManager$M9LDF0L5OYsIomcIVw0vQmIFrUc.run(Unknown Source:2)
        at java.lang.Thread.run(Thread.java:923)
2021-09-17 16:42:04.703 22047-22080/com.mysample.servicesample E/AWSKeyValueStore: Error in retrieving the decryption key used to decrypt the data from the persistent store. Returning null for the requested dataKey = us-east-2:XXXXXXXXXXXXXX-pool_Id.identityId

示例代码是

  private void initClients() {
    Thread thread = new Thread(() -> {
        CognitoCachingCredentialsProvider credentialsProvider = null;
        try {
            credentialsProvider = new CognitoCachingCredentialsProvider(
                    context.getApplicationContext(),
                    IDENTITY_POOL_ID,
                    Regions.US_EAST_2 // Region
            );

        } catch (Exception ex) {
            Log.e("Convo",ex.getMessage());
        }

        ddb = new AmazonDynamoDBClient(credentialsProvider);
        ddb.setRegion(Region.getRegion(Regions.US_EAST_2));
    });

    thread.start();
}

Answer 1

要创建调用亚马逊服务(包括亚马逊DynamoDB )的原生安卓应用程序，请使用AWS SDK for Kotlin。请看这篇亚马逊网络服务教程，它将带你了解如何使用这个软件开发工具包创建一个与DynamoDB交互的安卓应用程序。

Creating your first Native Android application using the AWS SDK for Kotlin