I m stuck from about 2 hours on a problem that i thought it was easy to solve. I m building a custom date-time picker for the android platform and, because of the slowness of the standard java.util.Calendar and java.util.Date classes, i decided to use the JODA library.

Unfortunately i ve got no experience with JAR references (forgive me...i come from COM and .NET assemblies world =)...), but i learn some tips on internet but obviously they seems to be wrong... These are the steps i took to use the library in my project:

1. Download the latest JODA library 2.1
2. Create the lib folder into my project folder
3. Add joda-time-2.1.jar to the lib folder.
4. Add the joda-time-2.1.jar library to the build path.
5. Add joda-time-2.1-javadoc.jar and joda-time-2.1-sources.jar to the lib folder
6. Set the above libraries as java source attachements and javadoc location for the joda-time-2.1 referenced library.
7. Use the new library into my code (the ehm ehm intelli-sense and compiler don t throws any error or warning)
8. Start debug on real or virtual device.

当涉及以下线时(第一个使用JODA BTW的线),便停止:

DateTime newDate = new DateTime(2012, 5, 3, 12, 0, 0);

并归还以下痕迹:

05-03 19:09:14.349: E/AndroidRuntime(4071): java.lang.NoClassDefFoundError: org.joda.time.DateTime
05-03 19:09:14.349: E/AndroidRuntime(4071):     at it.paganel.droidMessageExport.Control.TimePickerControl.SetTimePart(TimePickerControl.java:83)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at it.paganel.droidMessageExport.Control.TimePickerControl.onClick(TimePickerControl.java:116)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at android.view.View.performClick(View.java:2454)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at android.view.View$PerformClick.run(View.java:9030)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at android.os.Handler.handleCallback(Handler.java:587)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at android.os.Handler.dispatchMessage(Handler.java:92)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at android.os.Looper.loop(Looper.java:123)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at android.app.ActivityThread.main(ActivityThread.java:4641)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at java.lang.reflect.Method.invokeNative(Native Method)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at java.lang.reflect.Method.invoke(Method.java:521)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:870)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:628)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at dalvik.system.NativeStart.main(Native Method)
05-03 19:09:14.349: E/AndroidRuntime(4071): Caused by: java.lang.ClassNotFoundException: org.joda.time.DateTime in loader dalvik.system.PathClassLoader[/data/app/it.paganel.droidMessageExport-2.apk]
05-03 19:09:14.349: E/AndroidRuntime(4071):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
05-03 19:09:14.349: E/AndroidRuntime(4071):     at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
05-03 19:09:14.349: E/AndroidRuntime(4071):     ... 13 more

Someone can help me? Thanks in advance!