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alaurenz / metrobike

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runtime exception when relaunch the app #63

Closed sw11 closed 11 years ago

sw11 commented 11 years ago

@alaurenz @meganca @CoolCapri @coreyh3 @smile76054789 I open the app in the device, and then launch the app by clicking run button in eclipse, it gives me this error:

FATAL EXCEPTION: main

ava.lang.RuntimeException: Unable to instantiate application android.app.Application: java.lang.NullPointerException at android.app.LoadedApk.makeApplication(LoadedApk.java:482) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:3950) at android.app.ActivityThread.access$1300(ActivityThread.java:127) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1197) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4507) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:978) com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745) dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException android.app.LoadedApk.initializeJavaContextClassLoader(LoadedApk.java:362) at android.app.LoadedApk.getClassLoader(LoadedApk.java:305) at android.app.LoadedApk.makeApplication(LoadedApk.java:474) ... 11 more

It didn't crash, instead it will just run the app. Everything seems fine but I can see this error in the log.

CoolCapri commented 11 years ago

Check this link and you can find the answer http://stackoverflow.com/questions/10150899/runtimeexception-unable-to-instantiate-application

sw11 commented 11 years ago

Thanks, I can see that. But do we need to address this issue in our bug system? So we can tell the staff that it is not "actually" a bug?

dutchscout commented 11 years ago

It looks like this error my be coming from when the app is killed and before the new version is loaded. Since this doesn't happen when a person is simply using the app, it shouldn't be a problem. In fact, the TAs may not even see the message at all...

Now, we do need to be sure that our app doesn't crash if it gets minimized/restored/etc. How well are we using onPause/onResume and onStop/onStart ?

dutchscout commented 11 years ago

We'll leave this issue open until after the TA grades our stuff, so they know that we know about it.

dutchscout commented 11 years ago

Closing this now... Please reopen if this issue resurfaces.