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我试图在我的电脑上编译这个例子，所有的应用程序都有这样的错误：

04-17 18:01:18.493: E/AndroidRuntime(271): FATAL EXCEPTION: main
04-17 18:01:18.493: E/AndroidRuntime(271): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{sfs2x.example.android.tris/sfs2x.example.android.tris.Tris}: java.lang.ClassNotFoundException: sfs2x.example.android.tris.Tris in loader dalvik.system.PathClassLoader[/data/app/sfs2x.example.android.tris-2.apk]
04-17 18:01:18.493: E/AndroidRuntime(271):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
04-17 18:01:18.493: E/AndroidRuntime(271):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-17 18:01:18.493: E/AndroidRuntime(271):    at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-17 18:01:18.493: E/AndroidRuntime(271):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-17 18:01:18.493: E/AndroidRuntime(271):    at android.os.Handler.dispatchMessage(Handler.java:99)
04-17 18:01:18.493: E/AndroidRuntime(271):    at android.os.Looper.loop(Looper.java:123)
04-17 18:01:18.493: E/AndroidRuntime(271):    at android.app.ActivityThread.main(ActivityThread.java:4627)
04-17 18:01:18.493: E/AndroidRuntime(271):    at java.lang.reflect.Method.invokeNative(Native Method)
04-17 18:01:18.493: E/AndroidRuntime(271):    at java.lang.reflect.Method.invoke(Method.java:521)
04-17 18:01:18.493: E/AndroidRuntime(271):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-17 18:01:18.493: E/AndroidRuntime(271):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-17 18:01:18.493: E/AndroidRuntime(271):    at dalvik.system.NativeStart.main(Native Method)
04-17 18:01:18.493: E/AndroidRuntime(271): Caused by: java.lang.ClassNotFoundException: sfs2x.example.android.tris.Tris in loader dalvik.system.PathClassLoader[/data/app/sfs2x.example.android.tris-2.apk]
04-17 18:01:18.493: E/AndroidRuntime(271):    at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)    
04-17 18:01:18.493: E/AndroidRuntime(271):    at java.lang.ClassLoader.loadClass(ClassLoader.java:573)    
04-17 18:01:18.493: E/AndroidRuntime(271):    at java.lang.ClassLoader.loadClass(ClassLoader.java:532)    
04-17 18:01:18.493: E/AndroidRuntime(271):    at android.app.Instrumentation.newActivity(Instrumentation.java:1021)    
04-17 18:01:18.493: E/AndroidRuntime(271):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)    
04-17 18:01:18.493: E/AndroidRuntime(271):    ... 11 more

从这里下载例子

我有：

  • Windows 7 X64、Eclipse 和 Android NDK 最新版本。
  • 最新版本的 SmartFox 服务器。
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1 回答 1

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我发现我的问题的解决方案是这个链接：

http://android.foxykeep.com/dev/how-to-fix-the-classdefnotfounderror-with-adt-17

特别是这个：

If you have references to jars that are not in the ‘libs’ folder, for example if you use ‘classpath variable’, you can resolve the NoClassDefFoundError issue with the new ADT 17 by exporting the references.

To export the references: simply go to “Properties > Java Build Path > Order and Export”, and check all the references you want exported.
于 2012-04-24T08:41:17.357 回答