在android中構建項目時出現這個錯誤？

請檢查下面的錯誤日誌

06-29 09:09:59.384: ERROR/AndroidRuntime(545): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{s.s/s.s.MainActivity}: java.lang.ClassNotFoundException: s.s.MainActivity in loader dalvik.system.PathClassLoader[/data/app/s.s-2.apk] 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1544) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1638) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:928) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at android.os.Handler.dispatchMessage(Handler.java:99) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at android.os.Looper.loop(Looper.java:123) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at android.app.ActivityThread.main(ActivityThread.java:3647) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at java.lang.reflect.Method.invokeNative(Native Method) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at java.lang.reflect.Method.invoke(Method.java:507) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at dalvik.system.NativeStart.main(Native Method) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545): Caused by: java.lang.ClassNotFoundException: s.s.MainActivity in loader dalvik.system.PathClassLoader[/data/app/s.s-2.apk] 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at java.lang.ClassLoader.loadClass(ClassLoader.java:551) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1536) 
06-29 09:09:59.384: ERROR/AndroidRuntime(545):  ... 11 more

來源

2011-06-29 Adham

您添加活動到您的Manifest.xml？ –

嗯，這意味着該類沒有找到:-)

你有叫s.s.MainActivity一類？你是否拼寫錯了（你的清單和源文件之間的拼寫不一致？）。你是否意外地用ProGuard將它從你的apk中解脫出來？

來源

2011-06-29 09:16:22

看看你的Manifest文件...我認爲不在那裏添加活動會導致這個問題。

應該是這個樣子：

 <activity android:name=".MainActivity"> 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 
      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity>

來源

2011-06-29 09:22:02

在android中構建項目時出現這個錯誤？

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