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我是 Java 编程新手，这让我很困惑。我的应用程序启动时出现运行时异常和强制关闭。在我将大量代码制作成数组而不是单数之前，它确实有效。有人可以告诉我可能出了什么问题吗？

07-15 16:30:29.441: INFO/ARMAssembler(61): generated scanline__00000177:03515104_00001001_00000000 [ 91 ipp] (114 ins) at [0x38fe50:0x390018] in 1735976 ns
07-15 16:30:29.551: ERROR/gralloc(61): [unregister] handle 0x4910f0 still locked (state=40000001)
07-15 16:30:58.871: DEBUG/AndroidRuntime(229): Shutting down VM
07-15 16:30:58.871: WARN/dalvikvm(229): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
07-15 16:30:58.871: ERROR/AndroidRuntime(229): Uncaught handler: thread main exiting due to uncaught exception
07-15 16:30:59.252: ERROR/AndroidRuntime(229): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.golfandroid/com.example.golfandroid.GolfScoreActivity}: java.lang.NullPointerException
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at android.app.ActivityThread.access$2200(ActivityThread.java:119)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at android.os.Handler.dispatchMessage(Handler.java:99)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at android.os.Looper.loop(Looper.java:123)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at android.app.ActivityThread.main(ActivityThread.java:4363)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at java.lang.reflect.Method.invokeNative(Native Method)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at java.lang.reflect.Method.invoke(Method.java:521)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at dalvik.system.NativeStart.main(Native Method)
07-15 16:30:59.252: ERROR/AndroidRuntime(229): Caused by: java.lang.NullPointerException
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at com.example.golfandroid.GolfScoreActivity.SetupClickListeners(GolfScoreActivity.java:725)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at com.example.golfandroid.GolfScoreActivity.onCreate(GolfScoreActivity.java:551)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
07-15 16:30:59.252: ERROR/AndroidRuntime(229):     ... 11 more
07-15 16:30:59.432: INFO/Process(61): Sending signal. PID: 229 SIG: 3
07-15 16:30:59.462: INFO/dalvikvm(229): threadid=7: reacting to signal 3
07-15 16:30:59.753: INFO/dalvikvm(229): Wrote stack trace to '/data/anr/traces.txt'

代码：

public void SetupClickListeners(){ 
    for(int holeNum=1; holeNum<18; holeNum++){ 
        scorePlayHole[currentPlayerNum-1][holeNum-1].addTextChangedListener(this); 
    } 
    for(int i=1; i<currentPlayerNum*4; i++){ 
        NextPlayerHoleButton[currentPlayerNum-1][i].setOnClickListener(this); 
    } 
}
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3 回答 3

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这只是在黑暗中刺伤，因为我只有堆栈跟踪而不是相关来源。

你看过这个源文件吗？GolfScoreActivity.java 行号 725

看起来您正在设置 Click Listener，但未初始化某些内容并且为 Null

于 2011-07-15T16:45:19.350 回答
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07-15 16:30:59.252: ERROR/AndroidRuntime(229): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.golfandroid/com.example.golfandroid.GolfScoreActivity}: java.lang.NullPointerException

这并不是真正的运行时异常。这是一个包装了空指针异常的运行时异常。根本原因是空指针：

检查您的代码后，其中任何一个都可能null导致空指针异常。

scorePlayHole
scorePlayHole[currentPlayerNum-1]
scorePlayHole[currentPlayerNum-1][holeNum-1]
NextPlayerHoleButton
NextPlayerHoleButton[currentPlayerNum-1]
NextPlayerHoleButton[currentPlayerNum-1][i]

于 2011-07-15T17:34:19.307 回答
0

在黑暗中拍摄，因为没有看到很难分辨的代码 - 但是如果您已将代码转换为使用数组，您是否记得新数组本身以及进入数组的对象？

于 2011-07-15T16:55:00.623 回答