4
我希望使用Apache Commons VFS庫在我的Android項目，並從http://commons.apache.org/vfs/download_vfs.cgi下載相關文件。然而。我遇到一些問題。的Android - 安裝Apache下議院VFS - 問題
，我複製公地vfs2-2.0.jar文件到我的Android項目的/庫/子目錄，並在Eclipse的Java構建路徑引用它。我還引用了Commons VFS使用的Commons Logging庫（http://commons.apache.org/vfs/download.html）。
一切編譯罰款，但只要我努力的代碼
FileSystemManager fsManager = VFS.getManager();
以下行我得到一個異常。這裏的堆棧跟蹤：
02-06 16:22:29.724: ERROR/Fatal Error(20515): Could not create a file system manager of class "org.apache.commons.vfs2.impl.StandardFileSystemManager".
02-06 16:22:29.724: ERROR/Fatal Error(20515): org.apache.commons.vfs2.FileSystemException: Could not create a file system manager of class "org.apache.commons.vfs2.impl.StandardFileSystemManager".
02-06 16:22:29.724: ERROR/Fatal Error(20515): at org.apache.commons.vfs2.VFS.createManager(VFS.java:99)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at org.apache.commons.vfs2.VFS.getManager(VFS.java:50)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at gymApp.gymAppPackage.Utility.test(Utility.java:391)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at gymApp.gymAppPackage.HomeActivity.onCreate(HomeActivity.java:51)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2466)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2519)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at android.app.ActivityThread.access$2200(ActivityThread.java:123)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1870)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at android.os.Handler.dispatchMessage(Handler.java:99)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at android.os.Looper.loop(Looper.java:123)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at android.app.ActivityThread.main(ActivityThread.java:4370)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at java.lang.reflect.Method.invokeNative(Native Method)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at java.lang.reflect.Method.invoke(Method.java:521)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at dalvik.system.NativeStart.main(Native Method)
02-06 16:22:29.724: ERROR/Fatal Error(20515): Caused by: org.apache.commons.vfs2.FileSystemException: Could not load VFS configuration from "jar:file:/data/app/gymApp.gymAppPackage.apk!/org/apache/commons/vfs2/impl/providers.xml".
02-06 16:22:29.724: ERROR/Fatal Error(20515): at org.apache.commons.vfs2.impl.StandardFileSystemManager.configure(StandardFileSystemManager.java:199)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at org.apache.commons.vfs2.impl.StandardFileSystemManager.init(StandardFileSystemManager.java:123)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at java.lang.reflect.Method.invokeNative(Native Method)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at java.lang.reflect.Method.invoke(Method.java:521)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at org.apache.commons.vfs2.VFS.createManager(VFS.java:88)
02-06 16:22:29.724: ERROR/Fatal Error(20515): ... 16 more
02-06 16:22:29.724: ERROR/Fatal Error(20515): Caused by: org.apache.commons.vfs2.FileSystemException: Could not create file provider of class "org.apache.commons.vfs2.provider.local.DefaultLocalFileProvider".
02-06 16:22:29.724: ERROR/Fatal Error(20515): at org.apache.commons.vfs2.impl.StandardFileSystemManager.createInstance(StandardFileSystemManager.java:490)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at org.apache.commons.vfs2.impl.StandardFileSystemManager.addProvider(StandardFileSystemManager.java:371)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at org.apache.commons.vfs2.impl.StandardFileSystemManager.configure(StandardFileSystemManager.java:270)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at org.apache.commons.vfs2.impl.StandardFileSystemManager.configure(StandardFileSystemManager.java:195)
02-06 16:22:29.724: ERROR/Fatal Error(20515): ... 20 more
02-06 16:22:29.724: ERROR/Fatal Error(20515): Caused by: java.lang.ClassNotFoundException: org.apache.commons.vfs2.provider.local.DefaultLocalFileProvider in loader [email protected]
02-06 16:22:29.724: ERROR/Fatal Error(20515): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
02-06 16:22:29.724: ERROR/Fatal Error(20515): at org.apache.commons.vfs2.impl.StandardFileSystemManager.createInstance(StandardFileSystemManager.java:485)
02-06 16:22:29.724: ERROR/Fatal Error(20515): ... 23 more
好像一些基本的東西是錯誤的安裝，但我不知道它是什麼（Java是不是我的第一語言）。鑑於它是Android項目，是否有什麼特別的事情需要完成？任何指針將不勝感激。