Question

我已经得到一个持久的错误，这次我找不到问题。有些人说logcat会显示problamatic行号，但是，我还没有找到这个很棒的资源。这是一个logcat，它显示了当我拔出键盘时应用程序崩溃时我得到的错误。

06-14 10:04:42.734: E/AndroidRuntime(29547): FATAL EXCEPTION: main
06-14 10:04:42.734: E/AndroidRuntime(29547): java.lang.NullPointerException
06-14 10:04:42.734: E/AndroidRuntime(29547):    at com.daniel.kilometermilecoverter.MainActivity.onConfigurationChanged(MainActivity.java:171)
06-14 10:04:42.734: E/AndroidRuntime(29547):    at android.app.ActivityThread.performConfigurationChanged(ActivityThread.java:2956)
06-14 10:04:42.734: E/AndroidRuntime(29547):    at android.app.ActivityThread.handleConfigurationChanged(ActivityThread.java:3049)
06-14 10:04:42.734: E/AndroidRuntime(29547):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1015)
06-14 10:04:42.734: E/AndroidRuntime(29547):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-14 10:04:42.734: E/AndroidRuntime(29547):    at android.os.Looper.loop(Looper.java:130)
06-14 10:04:42.734: E/AndroidRuntime(29547):    at android.app.ActivityThread.main(ActivityThread.java:3740)
06-14 10:04:42.734: E/AndroidRuntime(29547):    at java.lang.reflect.Method.invokeNative(Native Method)
06-14 10:04:42.734: E/AndroidRuntime(29547):    at java.lang.reflect.Method.invoke(Method.java:507)
06-14 10:04:42.734: E/AndroidRuntime(29547):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:876)
06-14 10:04:42.734: E/AndroidRuntime(29547):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:634)
06-14 10:04:42.734: E/AndroidRuntime(29547):    at dalvik.system.NativeStart.main(Native Method)
06-14 10:04:42.744: E/AndroidRuntime(29547): [FRANDRO_ERR_HANDLER] com_android_internal_os_RuntimeInit_BlueErrorHandler
06-14 10:04:42.744: E/AndroidRuntime(29547): [Blue Error Handler] Make Debugging Report file for main
06-14 10:04:42.744: E/AndroidRuntime(29547): java.lang.NullPointerException
06-14 10:04:42.744: E/AndroidRuntime(29547):    at com.daniel.kilometermilecoverter.MainActivity.onConfigurationChanged(MainActivity.java:171)
06-14 10:04:42.744: E/AndroidRuntime(29547):    at android.app.ActivityThread.performConfigurationChanged(ActivityThread.java:2956)
06-14 10:04:42.744: E/AndroidRuntime(29547):    at android.app.ActivityThread.handleConfigurationChanged(ActivityThread.java:3049)
06-14 10:04:42.744: E/AndroidRuntime(29547):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1015)
06-14 10:04:42.744: E/AndroidRuntime(29547):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-14 10:04:42.744: E/AndroidRuntime(29547):    at android.os.Looper.loop(Looper.java:130)
06-14 10:04:42.744: E/AndroidRuntime(29547):    at android.app.ActivityThread.main(ActivityThread.java:3740)
06-14 10:04:42.744: E/AndroidRuntime(29547):    at java.lang.reflect.Method.invokeNative(Native Method)
06-14 10:04:42.744: E/AndroidRuntime(29547):    at java.lang.reflect.Method.invoke(Method.java:507)
06-14 10:04:42.744: E/AndroidRuntime(29547):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:876)
06-14 10:04:42.744: E/AndroidRuntime(29547):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:634)
06-14 10:04:42.744: E/AndroidRuntime(29547):    at dalvik.system.NativeStart.main(Native Method)
06-14 10:04:44.766: E/AndroidRuntime(29547): [FRANDRO_ERR_HANDLER] Done.

Answer 1

行末尾的那些数字（在带有文件名的括号中）是发生错误的行号。找到处理程序的文件，并查看相应的行号（在本例中为MainActivity.java第171行）。

Answer 2

在 logcat 搜索栏中写入 .java 可以看到这一行

com.daniel.kilometermilecoverter.MainActivity.onConfigurationChanged(MainActivity.java:171) 06-14 10:04:42.734: E/AndroidRuntime(29547): at

Answer 3

com.daniel.kilometermilecoverter.MainActivity.onConfigurationChanged（ MainActivity.java:171 ）06-14 10：04：42.734：E / AndroidRuntime（29547）：at

Answer 4

这是你的活动和线。

com.daniel.kilometermilecoverter.MainActivity.onConfigurationChanged（MainActivity.java:171)06-14 10：04：42.744：E / AndroidRuntime（29547）：

如何在logcat中找到行号？

4 个答案: