問題描述

在我的 Android 應用程序中，我使用 DynamoDb.我創建了一個類，它與一個數據庫表映射.應用程序在調試中正常運行.但是如果我導出 apk 并運行應用程序，我會得到 DynamoDbMapperException:

In my android app, I use DynamoDb. I create a class, which is mapped with a table of database. App runs normally in debug. But if I export apk and run app, I get the DynamoDbMapperException:

Caused by: com.amazonaws.mobileconnectors.dynamodbv2.dynamodbmapper.DynamoDBMappingException: No method annotated with interface com.amazonaws.mobileconnectors.dynamodbv2.dynamodbmapper.DynamoDBHashKey for class class com.example.myclass.

我使用 Eclipse 和 proguard 來導出 apk.我猜 proguard 會導致問題，因為沒有 proguard 的 apk 可以正常工作.這是我的 Proguard 配置:

I use Eclipse and proguard to export apk. I guess proguard causes the problem, because the apk without proguard works fine. Here is my Proguard config:

-keepattributes *Annotation*
-keep public class com.example.myclass

請幫幫我！我不知道如何解決這個問題.

Please help me! I don't know how to solve the problem.

推薦答案

你使用的是 DynamoDB 表嗎?

Are you using a DynamoDB table?

你需要一個類的哈希鍵，你應該用@DynamoDBHashKey注釋字段，你是否不小心將它注釋為@DynamoDBIndexHashKey?如果是這樣，你應該把它改回來.

You need to have a hash key for the class, you should annotate the field with @DynamoDBHashKey, do you accidentally annotated it as @DynamoDBIndexHashKey? If so, you should change it back.

類似的參考可以在這里找到

A similar reference can be found here

Android Amazon DynamoDb 基本操作錯誤

嘗試改變

-keep public class com.example.myclass

到

-keep public class com.example.myclass {
    *;
}

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