Java错误（运行时异常 - 非法参数异常） - Android

Question

以下是我收到的错误消息：E/AndroidRuntime(416): java.lang.RuntimeException: Unable to start activity ComponentInfo java.lang.IllegalArgumentException。我拿出应用程序文件名/软件包名称，但其他一切都在那里。该应用旨在针对姜饼，但具有Froyo的最低SDK级别。当我尝试在AVD上启动应用程序时，我基本上会收到AVR消息。源代码大约460行，所以我不确定错误的位置（没有语法错误，所以我不确定我在做什么错误）。以下是我所提供的源代码的pastebin网址：http://pastebin.com/EtUP2CAB。我见过一些关于DecimalFormatSymbols和SensorSimulator等的东西，但我仍然感到困惑。因此，我很感谢在这里找到导致此错误的问题的一些帮助。

编辑：下面是错误日志的最后一次运行我所做的：

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不是正数，其0或小于0，检查numberOfFlags值通过调试。