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今天早上我从 Eclipse 更新了各种 SDK 组件。我认为是 - Android SDK 或平台工具 - Google API 17 更新 - Android 支持库 - Google Play 服务

现在，我的应用程序不会部署。他们构建良好（最终，经过一个小时的重新配置和重建）但现在当我部署到设备时，我得到以下信息：

 VFY: unable to find class referenced in signature (Landroid/support/v4/app/Fragment;)
 VFY: unable to find class referenced in signature (Landroid/support/v4/app/Fragment;)
 VFY: unable to find class referenced in signature (Landroid/support/v4/app/Fragment;)
 Unable to resolve superclass of Lcom/com/myapp/MainActivity; (81)
 Link of class 'Lcom/com/myapp/MainActivity;' failed
 VFY: replacing opcode 0x71 at 0x0006
 VFY: unable to find class referenced in signature (Landroid/support/v4/app/Fragment;)
 Unable to resolve superclass of Lcom/com/myapp/MainActivity; (81)
 Link of class 'Lcom/com/myapp/MainActivity;' failed
 Shutting down VM
 threadid=1: thread exiting with uncaught exception (group=0x40015560)
 FATAL EXCEPTION: main
 java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.myapp/com.myapp.MainActivity}: java.lang.ClassNotFoundException: com.myapp.MainActivity in loader dalvik.system.PathClassLoader[/data/app/com.myapp.apk]
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1680)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1784)
    at android.app.ActivityThread.access$1500(ActivityThread.java:123)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:130)
    at android.app.ActivityThread.main(ActivityThread.java:3835)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
    at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.ClassNotFoundException: com.myapp.MainActivity in loader dalvik.system.PathClassLoader[/data/app/myapp.apk]
    at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
    at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1672)
    ... 11 more

请记住，这个项目和其他项目已经愉快地运行了几个月，所以这不仅仅是一些愚蠢的错误，比如清单文件中缺少的活动。

我真的希望我现在没有为更新而烦恼......欢迎任何想法！

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2 回答 2

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几天前我遇到了这个问题。

右键单击您的项目，转到属性-> Java 构建路径-> 排序和导出

检查Android私有库->单击确定

清理项目并运行它。它将工作。

于 2013-05-23T09:20:53.293 回答
1

sdk\extras\android\support\v4 里面有一个 jar 文件 android-support-v4.jar 把这个添加到外部 jars

于 2013-05-23T09:31:18.150 回答