Question

I was editing anandroid app that was based off of a similar one I had done before that had worked before. This time its not working but I don’t know why.

App error:

The Application Buchanan Java Quiz Game (process hu.csc395.javaquizgame) has stopped unexpectedly Please Try again. 

My log shows this:

04-28 04:31:40.326: D/AndroidRuntime(337): Shutting down VM
04-28 04:31:40.326: W/dalvikvm(337): threadid=1: thread exiting with uncaught exception    (group=0x40015560)
04-28 04:31:40.395: E/AndroidRuntime(337): FATAL EXCEPTION: main
04-28 04:31:40.395: E/AndroidRuntime(337): java.lang.RuntimeException: Unable to start activity      ComponentInfo{hu.csc395.javaquizgame/hu.csc395.javaquizgame.Buchanan_JavaQuizGameActivity}:    java.lang.IllegalArgumentException

I don’t know where these are located so maybe I’m just missing it.

Full Logcat with the exception:

    04-28 04:31:40.326: D/AndroidRuntime(337): Shutting down VM
    04-28 04:31:40.326: W/dalvikvm(337): threadid=1: thread exiting with uncaught exception (group=0x40015560)
    04-28 04:31:40.395: E/AndroidRuntime(337): FATAL EXCEPTION: main
04-28 04:31:40.395: E/AndroidRuntime(337): java.lang.RuntimeException: Unable to start activity ComponentInfo{hu.csc395.javaquizgame/hu.csc395.javaquizgame.Buchanan_JavaQuizGameActivity}: java.lang.IllegalArgumentException
    04-28 04:31:40.395: E/AndroidRuntime(337):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
    04-28 04:31:40.395: E/AndroidRuntime(337):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at android.app.ActivityThread.access$1500(ActivityThread.java:117)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at android.os.Handler.dispatchMessage(Handler.java:99)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at android.os.Looper.loop(Looper.java:123)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at android.app.ActivityThread.main(ActivityThread.java:3683)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at java.lang.reflect.Method.invokeNative(Native Method)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at java.lang.reflect.Method.invoke(Method.java:507)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at dalvik.system.NativeStart.main(Native Method)
   04-28 04:31:40.395: E/AndroidRuntime(337): Caused by: java.lang.IllegalArgumentException
   04-28 04:31:40.395: E/AndroidRuntime(337):   at java.util.Random.nextInt(Random.java:186)   
   04-28 04:31:40.395: E/AndroidRuntime(337):   at hu.csc395.javaquizgame.Buchanan_JavaQuizGameActivity.resetQuiz(Buchanan_JavaQuizGameActivity.java:121)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at hu.csc395.javaquizgame.Buchanan_JavaQuizGameActivity.onCreate(Buchanan_JavaQuizGameActivity.java:85)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
   04-28 04:31:40.395: E/AndroidRuntime(337):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
   04-28 04:31:40.395: E/AndroidRuntime(337):   ... 11 more
   04-28 04:34:37.995: I/Process(337): Sending signal. PID: 337 SIG: 9

And my console shows everything running normally until:

  [2012-04-28 01:48:17 - Emulator] emulator: WARNING: Unable to create sensors port: Unknown error
[2012-04-28 01:48:17 - Buchanan_JavaQuizGame] New emulator found: emulator-5554

Answer 1

Somewhere in your code you use the nextInt method of the Random class and I think you pass it a negative integer and this will throw the IllegalArgumentException(it requires that the method parameter is positive).

This happens in your resetQuiz method so check there what you do in your code.