DynamoDbMapperException:没有方法注释?

DynamoDbMapperException: No method annotated?(DynamoDbMapperException:没有方法注释?)

问题描述

在我的 Android 应用程序中，我使用 DynamoDb.我创建了一个类，它与一个数据库表映射.应用程序在调试中正常运行.但是如果我导出 apk 并运行应用程序，我会得到 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 来导出 apk.我猜 proguard 会导致问题，因为没有 proguard 的 apk 可以正常工作.这是我的 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

请帮帮我！我不知道如何解决这个问题.

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

推荐答案

你使用的是 DynamoDB 表吗?

Are you using a DynamoDB table?

你需要一个类的哈希键，你应该用@DynamoDBHashKey注释字段，你是否不小心将它注释为@DynamoDBIndexHashKey?如果是这样，你应该把它改回来.

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.

类似的参考可以在这里找到

A similar reference can be found here

Android Amazon DynamoDb 基本操作错误

尝试改变

-keep public class com.example.myclass

到

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

这篇关于DynamoDbMapperException:没有方法注释?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！