eclipse - java.lang.NoClassDefFoundError: com.facebook.android.Facebook

Question

I keep getting the error java.lang.NoClassDefFoundError: com.facebook.android.Facebook when running my application.

This occurs when calling:

facebook = new Facebook(APP_ID);

Addtional error message:

Could not find class 'com.facebook.android.Facebook', referenced from method com.example.example1.ShareOnFacebook.onCreate

I have add the facebook .jar file via Referenced libraries in Eclipse.

Has anyone encountered/solve this problem?

Answer 1

Just go to Project / Properties / Java Build Path / Order and Export and click on jar's checkbox. This will set jar as "exported". You can verify this in .classparh file: classpathentry exported="true" kind="lib" path="/my-jars/facebook-android-sdk-1.2.1.jar"

Don't forget to clean your project after that (Project / Clean...)