Java錯誤（運行時異常 - 非法參數異常） - Android

Question

以下是我收到的錯誤消息：E/AndroidRuntime(416): java.lang.RuntimeException: Unable to start activity ComponentInfo java.lang.IllegalArgumentException。我拿出應用程序文件名/軟件包名稱，但其他一切都在那裏。該應用旨在針對薑餅，但具有Froyo的最低SDK級別。當我嘗試在AVD上啓動應用程序時，我基本上會收到AVR消息。源代碼大約460行，所以我不確定錯誤的位置（沒有語法錯誤，所以我不確定我在做什麼錯誤）。以下是我所提供的源代碼的pastebin網址：http://pastebin.com/EtUP2CAB。我見過一些關於DecimalFormatSymbols和SensorSimulator等的東西，但我仍然感到困惑。因此，我很感謝在這裏找到導致此錯誤的問題的一些幫助。

編輯：下面是錯誤日誌的最後一次運行我所做的：

02-03 20:51:21.724: D/AndroidRuntime(468): Shutting down VM 
02-03 20:51:21.724: W/dalvikvm(468): threadid=1: thread exiting with uncaught exception (group=0x40015560) 
02-03 20:51:21.784: E/AndroidRuntime(468): FATAL EXCEPTION: main 
02-03 20:51:21.784: E/AndroidRuntime(468): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.deitel.flagquizgame/com.deitel.flagquizgame.FlagQuizGame}: java.lang.IllegalArgumentException 
02-03 20:51:21.784: E/AndroidRuntime(468): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 
02-03 20:51:21.784: E/AndroidRuntime(468): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 
02-03 20:51:21.784: E/AndroidRuntime(468): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
02-03 20:51:21.784: E/AndroidRuntime(468): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 
02-03 20:51:21.784: E/AndroidRuntime(468): at android.os.Handler.dispatchMessage(Handler.java:99) 
02-03 20:51:21.784: E/AndroidRuntime(468): at android.os.Looper.loop(Looper.java:123) 
02-03 20:51:21.784: E/AndroidRuntime(468): at android.app.ActivityThread.main(ActivityThread.java:3683) 
02-03 20:51:21.784: E/AndroidRuntime(468): at java.lang.reflect.Method.invokeNative(Native Method) 
02-03 20:51:21.784: E/AndroidRuntime(468): at java.lang.reflect.Method.invoke(Method.java:507) 
02-03 20:51:21.784: E/AndroidRuntime(468): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
02-03 20:51:21.784: E/AndroidRuntime(468): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
02-03 20:51:21.784: E/AndroidRuntime(468): at dalvik.system.NativeStart.main(Native Method) 
02-03 20:51:21.784: E/AndroidRuntime(468): Caused by: java.lang.IllegalArgumentException 
02-03 20:51:21.784: E/AndroidRuntime(468): at java.util.Random.nextInt(Random.java:186) 
02-03 20:51:21.784: E/AndroidRuntime(468): at com.deitel.flagquizgame.FlagQuizGame.resetQuiz(FlagQuizGame.java:136) 
02-03 20:51:21.784: E/AndroidRuntime(468): at com.deitel.flagquizgame.FlagQuizGame.onCreate(FlagQuizGame.java:92) 
02-03 20:51:21.784: E/AndroidRuntime(468): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
02-03 20:51:21.784: E/AndroidRuntime(468): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 
02-03 20:51:21.784: E/AndroidRuntime(468): ... 11 more 
02-03 20:51:27.464: I/Process(468): Sending signal. PID: 468 SIG: 9 

Answer 1

似乎符合

int randomIndex = random.nextInt(numberOfFlags); 

numberOfFlags不是正數，其0或小於0，檢查numberOfFlags值通過調試。