Hello. I don't know where I did wrong, but when I try to initilize the associate api like this: AssociatesAPI.initialize(new AssociatesAPI.Config("xxxxxxxxxxxxxxxx", this)); It crash and gave me this error 09-12 05:22:02.663: E/AndroidRuntime(719): java.lang.NoClassDefFoundError: com.amazon.device.associates.AssociatesAPI$Config There is no problem to build an apk. How come the Amazon associate library is not built into the apk? I don't understand. I already add the jar to the liberary. Thanks!