Android應用FC因爲ClassNotFoundException

Question

小部件工作正常，但主要活動FC。

的logcat的是以下：

04-22 14:13:58.045: D/AndroidRuntime(2479): Shutting down VM 
04-22 14:13:58.045: W/dalvikvm(2479): threadid=1: thread exiting with uncaught exception (group=0x40018560) 
04-22 14:13:58.065: E/AndroidRuntime(2479): FATAL EXCEPTION: main 
04-22 14:13:58.065: E/AndroidRuntime(2479): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.liamwli.reboot_widget/com.liamwli.reboot_widget.RebootwidgetActivity}: java.lang.ClassNotFoundException: com.liamwli.reboot_widget.RebootwidgetActivity in loader dalvik.system.PathClassLoader[/data/app/com.liamwli.reboot_widget-2.apk] 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1680) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1784) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at android.app.ActivityThread.access$1500(ActivityThread.java:123) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at android.os.Looper.loop(Looper.java:130) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at android.app.ActivityThread.main(ActivityThread.java:3835) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at java.lang.reflect.Method.invokeNative(Native Method) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at java.lang.reflect.Method.invoke(Method.java:507) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at dalvik.system.NativeStart.main(Native Method) 
04-22 14:13:58.065: E/AndroidRuntime(2479): Caused by: java.lang.ClassNotFoundException: com.liamwli.reboot_widget.RebootwidgetActivity in loader dalvik.system.PathClassLoader[/data/app/com.liamwli.reboot_widget-2.apk] 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at java.lang.ClassLoader.loadClass(ClassLoader.java:551) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1672) 
04-22 14:13:58.065: E/AndroidRuntime(2479):  ... 11 more 

我是新來的Android應用程序開發，不知道是什麼問題:(

Answer 1

Android是尋找一個名爲com.liamwli.reboot_widget.RebootwidgetActivity類，並不能找到它。請確保你的拼寫正確，包括大小寫。

我也建議刪除包名中的下劃線，因爲這可能會導致你的問題Java包通常是字母，數字和點。