NoClassDefFoundError while creating AmazonSNSClient using AWS SDK for Java

Question

In my Android app I want to work with Amazon SNS

AmazonSNSClient snsClient = new AmazonSNSClient(new ClasspathPropertiesFileCredentialsProvider());

But I got this error:

Caused by: java.lang.NoClassDefFoundError: com.amazonaws.services.sns.AmazonSNSClient

I use Eclipse Luna and installed AWS Toolkit for Eclipse. In Java Build Path of my Project, I selected "Add Library" -> "AWS SDK for Java".

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

Have you written an import statement for that package and class? — rusted brain
– rusted brain, Commented Aug 20, 2015 at 9:25
@deepu513 What do you mean? This line "import com.amazonaws.services.sns.AmazonSNSClient;" ? Of course yes. — TOP
– TOP, Commented Aug 20, 2015 at 9:33
The error is on that line only, it is not able to import the SDK. — rusted brain
– rusted brain, Commented Aug 20, 2015 at 9:35
@deepu513 I don't understand the problem. What is the reason? How to fix it? — TOP
– TOP, Commented Aug 20, 2015 at 9:36
Go to your project folder and then search for "libs" folder, it might be inside the app directory or build directory and paste your jar file there and restart eclipse. — rusted brain
– rusted brain, Commented Aug 20, 2015 at 9:39

WestonE · Accepted Answer · 2015-08-20 17:10:10Z

2

AWS has an SDK specifically for Android https://aws.amazon.com/mobile/sdk/.

A getting started guide, including how to set up in Eclipse (Or use Android Studio / Maven) is available at http://docs.aws.amazon.com/mobile/sdkforandroid/developerguide/setup.html.

I also highly suggest not embedding credentials in your application when releasing it, as it is highly insecure and anyone could decompile your app and steal your credentials. Instead I suggest looking at Amazon Cognito for authentication (it's in the guide linked above).

answered Aug 20, 2015 at 17:10

WestonE

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2 Comments

TOP Over a year ago

Thank you very much. It works. I have to create a credentials: AWSCredentials awsCredentials = new BasicAWSCredentials(accessKey, secretKey). Should I hide the accessKey and secretKey and how?

WestonE Over a year ago

Instead of using BasicAWSCredentials, use CognitoCachingCredentialsProvider. It requires you to set up a a Cognito Identity Pool on the console. Instructions can be found here docs.aws.amazon.com/mobile/sdkforandroid/developerguide/…. Glad your making progress!

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