android - 从 ADT 16 更新到 ADT 17 后出现 ClassNotFound 错误

Question

我的应用程序运行良好。但是，一旦我从 ADT 16 更新到 ADT 17，就会收到此错误

Unable to resolve superclass of Lcom/my/app/MyActivity; (130)
Link of class 'Lcom/my/app/MyActivity;' failed
D/AndroidRuntime(328): Shutting down VM
W/dalvikvm(328): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
E/AndroidRuntime(328): FATAL EXCEPTION: main
E/AndroidRuntime(328): java.lang.RuntimeException: Unable to instantiate activity     ComponentInfo{com.my.app/com.my.app.MyActivity}:   java.lang.ClassNotFoundException: com.my.app.MyActivity in loader   dalvik.system.PathClassLoader[/data/app/com.my.app-1.apk]
E/AndroidRuntime(328):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
E/AndroidRuntime(328):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
E/AndroidRuntime(328):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
E/AndroidRuntime(328):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
E/AndroidRuntime(328):  at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(328):  at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime(328):  at android.app.ActivityThread.main(ActivityThread.java:4627)
E/AndroidRuntime(328):  at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(328):  at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime(328):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime(328):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/AndroidRuntime(328):  at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime(328): Caused by: java.lang.ClassNotFoundException: com.my.app.MyActivity in loader dalvik.system.PathClassLoader[/data/app/com.my.app-1.apk]
E/AndroidRuntime(328):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
E/AndroidRuntime(328):  at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
E/AndroidRuntime(328):  at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
E/AndroidRuntime(328):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
E/AndroidRuntime(328):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
E/AndroidRuntime(328):  ... 11 more

如何解决？

Answer 1

出现此问题是因为“lib”文件夹现在被 Android People 重命名为“libs”。一旦我们将外部 jars 放到这个“libs”文件夹中，它就会自动添加到应用程序的构建路径中。