I just got this error recently, and my app also "prefers external"
installation. I haven't been able to reproduce the error either.
On 2 Jan, 16:09, Matteo Vega <vegao...@gmail.com> wrote:
> Hi,
>
> I have an application that's on Android Market with >10,000 users. Every
> once in while (once or twice a week), I am getting a ClassNotFoundException
> on the Market Developer Console for my main activity:
>
> java.lang.RuntimeException: Unable to instantiate activity
> ComponentInfo{com.mycompany.myapp/com.mycompany.myapp.MainActivity}:
> java.lang.ClassNotFoundException: com.mycompany.myapp.MainActivity in loader
> dalvik.system.PathClassLoader[/mnt/asec/com.mycompany.myapp-1/pkg.apk]
> at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2757)
> at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2866)
> at android.app.ActivityThread.access$2300(ActivityThread.java:140)
> at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2181)
> at android.os.Handler.dispatchMessage(Handler.java:99)
> at android.os.Looper.loop(Looper.java:143)
> at android.app.ActivityThread.main(ActivityThread.java:5097)
> at java.lang.reflect.Method.invokeNative(Native Method)
> at java.lang.reflect.Method.invoke(Method.java:521)
> at
> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
> at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
> at dalvik.system.NativeStart.main(Native Method)
> Caused by: java.lang.ClassNotFoundException:
> com.mycompany.myapp.MainActivity in loader
> dalvik.system.PathClassLoader[/mnt/asec/com.mycompany.myapp-1/pkg.apk]
> at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
> at android.app.Instrumentation.newActivity(Instrumentation.java:1034)
> at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2749)
> ... 11 more
>
> Note that this application is in production and used by > 10,000 people and
> MainActivity is the very first activity during startup. This error happens
> very rarely, but yet it happens. I couldn't reproduce it on my developer
> phone nor the emulator, so I ended up adding a default application that's
> extended from Application and called before my main activity, but this time
> I got the same exception for my Application class:
>
> java.lang.RuntimeException: Unable to instantiate application
> com.mycompany.myapp.App: java.lang.ClassNotFoundException:
> com.mycompany.myapp.App in loader
> dalvik.system.PathClassLoader[/mnt/asec/com.mycompany.myapp-1/pkg.apk]
> at
> android.app.ActivityThread$PackageInfo.makeApplication(ActivityThread.java:649)
> at
> android.app.ActivityThread.handleBindApplication(ActivityThread.java:4232)
> at android.app.ActivityThread.access$3000(ActivityThread.java:125)
> at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2071)
> at android.os.Handler.dispatchMessage(Handler.java:99)
> at android.os.Looper.loop(Looper.java:123)
> at android.app.ActivityThread.main(ActivityThread.java:4627)
> at java.lang.reflect.Method.invokeNative(Native Method)
> at java.lang.reflect.Method.invoke(Method.java:521)
> at
> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:876)
> at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:634)
> at dalvik.system.NativeStart.main(Native Method)
> Caused by: java.lang.ClassNotFoundException: com.mycompany.myapp.App in
> loader
> dalvik.system.PathClassLoader[/mnt/asec/com.mycompany.myapp-1/pkg.apk]
> at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
> at android.app.Instrumentation.newApplication(Instrumentation.java:942)
> at
> android.app.ActivityThread$PackageInfo.makeApplication(ActivityThread.java:644)
> ... 11 more
>
> This application is installed to SD Card by default and my guess is that it
> might be SD Card related, so I tried to mount/unmount my SD Card to
> reproduce it and still no luck. I am really puzzled at this point and trying
> to find out if anyone has suggestions. ClassNotFoundException is thrown when
> the app package does not contain a required class, but that's not the case
> for my app. Please help :)
>
> Thank you,
>
> -Vega
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