Как исправить ошибку NoClassDefFoundError при использовании сторонней библиотеки в нашем приложении?

Я используюандроид колесовыбрать дату и время в моем приложении. но мне надоело это NoClassDefFoundErrorпри использовании этой библиотеки.

Я включил wheel.jarв папку libs, но все равно получаю ошибку во время выполнения.

Вот ошибка logcat:

08-08 15:19:22.078: E/AndroidRuntime(21223): FATAL EXCEPTION: main 08-08 15:19:22.078: E/AndroidRuntime(21223): java.lang.NoClassDefFoundError: kankan.wheel.R$drawable 08-08 15:19:22.078: E/AndroidRuntime(21223): at kankan.wheel.widget.WheelView.initResourcesIfNecessary(WheelView.java:427) 08-08 15:19:22.078: E/AndroidRuntime(21223): at kankan.wheel.widget.WheelView.calculateLayoutWidth(WheelView.java:482) 08-08 15:19:22.078: E/AndroidRuntime(21223): at kankan.wheel.widget.WheelView.onMeasure(WheelView.java:518) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.View.measure(View.java:12775) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1385) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:1027) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.widget.LinearLayout.onMeasure(LinearLayout.java:565) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.View.measure(View.java:12775) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:594) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:376) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.View.measure(View.java:12775) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:594) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:376) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.View.measure(View.java:12775) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.View.measure(View.java:12775) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.View.measure(View.java:12775) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293) 08-08 15:19:22.078: E/AndroidRuntime(21223): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2240) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.View.measure(View.java:12775) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1151) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2539) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.os.Handler.dispatchMessage(Handler.java:99) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.os.Looper.loop(Looper.java:137) 08-08 15:19:22.078: E/AndroidRuntime(21223): at android.app.ActivityThread.main(ActivityThread.java:4514) 08-08 15:19:22.078: E/AndroidRuntime(21223): at java.lang.reflect.Method.invokeNative(Native Method) 08-08 15:19:22.078: E/AndroidRuntime(21223): at java.lang.reflect.Method.invoke(Method.java:511) 08-08 15:19:22.078: E/AndroidRuntime(21223): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 08-08 15:19:22.078: E/AndroidRuntime(21223): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 08-08 15:19:22.078: E/AndroidRuntime(21223): at dalvik.system.NativeStart.main(Native Method) 08-08 15:24:27.601: I/Process(21223): Sending signal. PID: 21223 SIG: 9