Question

One or two of my users experience the above class not found run time exception when trying to run my app.

How can that happen and how can I fix it? Is it a bad install?

Thanks

Paul

Stack trace received through Android Publishers site. I cannot replicate this myself.
(com.android.app.app.app) is the name of the app/activity as defined in the manifest.

java.lang.RuntimeException: Unable to
instantiate activity
ComponentInfo{my,app.app.app/com.android.app.app.app}:
java.lang.ClassNotFoundException:
com.android.app.app.app in loader
dalvik.system.PathClassLoader[/mnt/asec/my,app.app.app-1/pkg.apk]
at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2659)
at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2753)
at
android.app.ActivityThread.access$2500(ActivityThread.java:129)
at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:2107)
at
android.os.Handler.dispatchMessage(Handler.java:99)
at
android.os.Looper.loop(Looper.java:143)
at
android.app.ActivityThread.main(ActivityThread.java:4701)
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.android.app.app.app in loader
dalvik.system.PathClassLoader[/mnt/asec/my,app.app.app-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:1021)
at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2651)
… 11 more

Answer 1

I’d check to see if these users are installing the app on an SD card: if the app is installed the app icon might be visible in the application list (since that is stored on-device) but if the SD card is unavailable (removed or maybe mounted for reading by a PC over USB) when the user taps the application icon the attempts to load will fail. You will notice:

ComponentInfo{my,app.app.app/com.android.app.app.app}: java.lang.ClassNotFoundException: com.android.app.app.app in loader dalvik.system.PathClassLoader[/mnt/asec/my,app.app.app-1/pkg.apk] at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2659) at 

in your stack trace above: is /mnt/asec the SD card storage path on the device?