NoClassDefFoundError at DirectionalViewPager using

Question

Need help of people, who used DirectionalViewPager - library for vertical and horizontal ViewPager implementation. I do everything, as it described at DirectionalViewPager. But after creation of sample android project get the

    10-02 13:04:03.439: E/AndroidRuntime(1526): FATAL EXCEPTION: main
10-02 13:04:03.439: E/AndroidRuntime(1526): java.lang.NoClassDefFoundError: com.directionalviewpager.DirectionalViewPager$DataSetObserver
10-02 13:04:03.439: E/AndroidRuntime(1526):     at com.directionalviewpager.DirectionalViewPager.setAdapter(DirectionalViewPager.java:164)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at com.example.verticalview.SampleActivity.onCreate(SampleActivity.java:17)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at android.app.ActivityThread.access$1500(ActivityThread.java:117)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at android.os.Handler.dispatchMessage(Handler.java:99)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at android.os.Looper.loop(Looper.java:123)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at android.app.ActivityThread.main(ActivityThread.java:3687)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at java.lang.reflect.Method.invokeNative(Native Method)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at java.lang.reflect.Method.invoke(Method.java:507)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
10-02 13:04:03.439: E/AndroidRuntime(1526):     at dalvik.system.NativeStart.main(Native Method)

Who had bussiness with equal, please advise something.

Is directionalviewpager.jar located in libs folder, not in lib? — Geralt_Encore, Oct 02 '12 at 10:28
yeah, it located in libs folder and I added it as a external jar at libraries. And it also located at dependencies... — Rikki Tikki Tavi, Oct 02 '12 at 10:35
`DataSetObserver` is API class, used by widgets to observe data changes. Widgets register themselves as observers with adapters some time. Looks like your adapter doesn't support it. — S.D., Oct 02 '12 at 10:49
unfortunately, no. I decided to use HorizontalViewPager in my project. — Rikki Tikki Tavi, Dec 11 '12 at 11:43

score 0 · Answer 1 · answered Sep 18 '13 at 23:24

Besides having this jar in your libs folder also make sure to have it exported within your eclipse project settings. Same window as the add external jar option but another tab (last one I believe)

I wouldn't add it as external jar BTW. in Java a class added twice to the classpath will fail to load. Can't say if that is also true for android.

NoClassDefFoundError at DirectionalViewPager using

1 Answers1