Android：NoClassDefFoundError但不存在

Question

我一直在更新去年發佈的應用程序。在今天修改源代碼時，我發現了一個完全不同的活動，與我正在工作的內容完全無關。它給了我這個錯誤：

02-08 13:59:53.850: E/AndroidRuntime(11526): FATAL EXCEPTION: main 
02-08 13:59:53.850: E/AndroidRuntime(11526): java.lang.NoClassDefFoundError: uk/co/m/panic/MyLocationActivity 
02-08 13:59:53.850: E/AndroidRuntime(11526): at uk.co.m.panic.ParentActivity.onItemClick(ParentActivity.java:80) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at android.widget.AdapterView.performItemClick(AdapterView.java:292) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at android.widget.AbsListView.performItemClick(AbsListView.java:1108) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at android.widget.ListView.performItemClick(ListView.java:4760) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2571) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at android.widget.AbsListView$1.run(AbsListView.java:3284) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at android.os.Handler.handleCallback(Handler.java:608) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at android.os.Handler.dispatchMessage(Handler.java:92) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at android.os.Looper.loop(Looper.java:156) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at android.app.ActivityThread.main(ActivityThread.java:5045) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at java.lang.reflect.Method.invokeNative(Native Method) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at java.lang.reflect.Method.invoke(Method.java:511) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at dalvik.system.NativeStart.main(Native Method) 
02-08 13:59:53.850: E/AndroidRuntime(11526): Caused by: java.lang.IllegalAccessError: Class ref in pre-verified class resolved to unexpected implementation 
02-08 13:59:53.850: E/AndroidRuntime(11526): at dalvik.system.DexFile.defineClass(Native Method) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at dalvik.system.DexFile.loadClassBinaryName(DexFile.java:195) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at dalvik.system.DexPathList.findClass(DexPathList.java:315) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:58) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 
02-08 13:59:53.850: E/AndroidRuntime(11526): at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 
02-08 13:59:53.850: E/AndroidRuntime(11526): ... 15 more 

通常NoClassDefError會像活動從minfest缺少的東西。但在這種情況下並非如此。這些類名稱沒有改變，但我沒有更新我的v Android SDK中，所以我不知道這是否有過參與......在這條線發生

錯誤：

Intent myLocationItent = new Intent(ParentActivity.this, MyLocationActivity.class); 

Answer 1

如果使用.jar文件，您必須將其添加到項目根目錄中的libs/文件夾中（src/, res/,等旁邊）。檢查這種情況。