ACRA - 无法实例化活动ComponentInfo

Question

我正在使用acra向我报告当我的应用程序崩溃并且它正在运行时，但今天我收到了两个令我困惑的崩溃报告。这是我收到的堆栈跟踪（我用[]删除了包名：

STACK_TRACE = java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{[]/[]}: java.lang.ClassNotFoundException: [] in loader dalvik.system.PathClassLoader[/system/app/ProwlerAgent411.apk:/mnt/asec/[]/pkg.apk]
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1583)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1677)
    at android.app.ActivityThread.access$1500(ActivityThread.java:117)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:130)
    at android.app.ActivityThread.main(ActivityThread.java:3701)
    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:839)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
    at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassNotFoundException: [] in loader dalvik.system.PathClassLoader[/system/app/ProwlerAgent411.apk:/mnt/asec/[].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:1047)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1575)
    ... 11 more
java.lang.ClassNotFoundException: [] in loader dalvik.system.PathClassLoader[/system/app/ProwlerAgent411.apk:/mnt/asec/[]/pkg.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:1047)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1575)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1677)
    at android.app.ActivityThread.access$1500(ActivityThread.java:117)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:130)
    at android.app.ActivityThread.main(ActivityThread.java:3701)
    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:839)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
    at dalvik.system.NativeStart.main(Native Method) 

通常我也会得到一个手机型号，但这次我只获得了“PHONE_MODEL = generic”，而对于设备功能，我只得到“DEVICE_FEATURES =无法检索数据：null”。这是一个版本的应用程序，它是2个版本旧，手机运行Android 2.3.4。这是我第一次看到这个问题。我不知道这是怎么发生的，所以我无法复制它或如何解决出错的问题。