Im developing an Android Plugin for Unity3D that uses GS Android Studio SDK. After calling the inicialisation:

GSAndroidPlatform.initialise(myContext, "xxx", "xxx",null, true, true);

I get anerror NoClassDefFoundError calling these functions: 

GSAndroidPlatform.gs().stop();

GSAndroidPlatform.gs().start();

Caused by: java.lang.NoClassDefFoundError: com.gamesparks.sdk.GSConnection

                                                                     at com.gamesparks.sdk.GS.NewConnection(GS.java:208)

                                                                     at com.gamesparks.sdk.GS.ConnectIfRequired(GS.java:196)

                                                                     at com.gamesparks.sdk.GS.processQueues(GS.java:174)

                                                                     at com.gamesparks.sdk.GS$GSWorker.run(GS.java:561)

                                                                     at java.lang.Thread.run(Thread.java:818)

I´ve included in the Plugins/Android/ folder

* gamesparks-java-sdk-0.3.0-20170217.162721-1.jar

* gamesparks-android-client-sdk-0.3.0.aar

And in the libs folders of the Android Studio.

* gamesparks-java-sdk-0.3.0-20170217.162721-1.jar

But the class GSConnection is still missed. Any suggestion? 

Thank u!