간단한 어플 에러..에러코드 첨부.. 보는법좀 가르쳐주세요

Question

03-09 17:06:30.215: E/AndroidRuntime(20183): FATAL EXCEPTION: main
03-09 17:06:30.215: E/AndroidRuntime(20183): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nth/com.nth.MainActivity}: java.lang.NullPointerException
03-09 17:06:30.215: E/AndroidRuntime(20183):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at android.app.ActivityThread.access$700(ActivityThread.java:143)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1241)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at android.os.Handler.dispatchMessage(Handler.java:99)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at android.os.Looper.loop(Looper.java:137)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at android.app.ActivityThread.main(ActivityThread.java:4950)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at java.lang.reflect.Method.invokeNative(Native Method)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at java.lang.reflect.Method.invoke(Method.java:511)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:997)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:764)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at dalvik.system.NativeStart.main(Native Method)
03-09 17:06:30.215: E/AndroidRuntime(20183): Caused by: java.lang.NullPointerException
03-09 17:06:30.215: E/AndroidRuntime(20183):  at com.nth.MainActivity.onCreate(MainActivity.java:212)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at android.app.Activity.performCreate(Activity.java:5177)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
03-09 17:06:30.215: E/AndroidRuntime(20183):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
03-09 17:06:30.215: E/AndroidRuntime(20183):  ... 11 more
 

 

 

잘되던 프로그램인데... main.xml 여기서 제가 이미지 버튼 위치 같은것좀 막 만졌거든요.. 근대 갑자기 에러뜨네여.

소스 코드에는 문제 없는거 같은데 말입니다..

Answer 1

보는 방법은 특별히 없습니다. Exception 읽어보면 친절하게 나와 있는 편입니다.  아래에서 올라가면서 자신의 소스의 라인만 찾아 보면 됩니다. 

이 경우는 NullPointerException 이네요. 

 at com.nth.MainActivity.onCreate(MainActivity.java:212)

이니 MainActivity 212 라인에서 없는 자원에 접근하나봐요.