混乱阅读乱舞的堆栈跟踪

Question

我有在具有flurry诊断在谷歌播放的应用程序。在乱舞网站报告了一个NullPointerException但我奋力什么部分的代码，它是在发生。

的程序受到proguard的保护，但乱舞有一个系统，您可以上传proguard的mapping.txt文件，它会进行翻译。

产生的“堆栈跟踪”如下所示。我感到困惑的是，它与set_up_text_trace_for_quiz有关的“未知来源”，以及紧接着的下面五种方法的列表。空指针异常发生在哪里？为什么add_game_play_buttons旁边有$2548a35？在输出

java.lang.NullPointerException 
com.mycompany.mygame.DEF_GamePlay.set_up_text_trace_for_quiz(Unknown Source) 
          start_up_game_mode 
          distxyxy 
          do_move 
          add_game_play_buttons$2548a35 
          tpl 
com.mycompany.mygame.DEF_GamePlay$MicksSurfaceViewExtension.onTouchEvent(Unknown Source) 
android.view.View.dispatchTouchEvent(View.java:7340) 
android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185) 
android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1928) 
android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185) 
android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1928) 
android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185) 
android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1928) 
android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2185) 
android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1928) 
com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2113) 
com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1466) 
android.app.Activity.dispatchTouchEvent(Activity.java:2468) 
com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2061) 
android.view.View.dispatchPointerEvent(View.java:7525) 
android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3368) 
android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:3300) 
android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:4392) 
android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:4370) 
android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:4474) 
android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:171) 
android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method) 
android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:163) 
android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:4442) 
android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:4493) 
android.view.Choreographer$CallbackRecord.run(Choreographer.java:725) 
android.view.Choreographer.doCallbacks(Choreographer.java:555) 
android.view.Choreographer.doFrame(Choreographer.java:523) 
android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711) 
android.os.Handler.handleCallback(Handler.java:615) 
android.os.Handler.dispatchMessage(Handler.java:92) 
android.os.Looper.loop(Looper.java:137) 
android.app.ActivityThread.main(ActivityThread.java:4895) 
java.lang.reflect.Method.invokeNative(Native Method) 
java.lang.reflect.Method.invoke(Method.java:511) 
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994) 
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761) 
dalvik.system.NativeStart.main(Native Method) 

Answer 1

来看，它可能是您的ProGuard配置文件中缺少以下行：

-renamesourcefileattribute SourceFile 
-keepattributes SourceFile,LineNumberTable 

请看一看another post here一些更多的细节。