이런 오류가 왜뜨는지 모르겠습니다
07-15 12:48:20.377: E/AndroidRuntime(19899): FATAL EXCEPTION: main
07-15 12:48:20.377: E/AndroidRuntime(19899): Process: com.example.diary, PID: 19899
07-15 12:48:20.377: E/AndroidRuntime(19899): java.lang.NullPointerException
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.AbsListView.obtainView(AbsListView.java:2310)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.ListView.makeAndAddView(ListView.java:1790)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.ListView.fillDown(ListView.java:691)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.ListView.fillFromTop(ListView.java:752)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.ListView.layoutChildren(ListView.java:1616)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.AbsListView.onLayout(AbsListView.java:2132)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.View.layout(View.java:14858)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.ViewGroup.layout(ViewGroup.java:4646)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1055)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.View.layout(View.java:14858)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.ViewGroup.layout(ViewGroup.java:4646)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.View.layout(View.java:14858)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.ViewGroup.layout(ViewGroup.java:4646)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1673)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1527)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.LinearLayout.onLayout(LinearLayout.java:1436)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.View.layout(View.java:14858)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.ViewGroup.layout(ViewGroup.java:4646)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.FrameLayout.layoutChildren(FrameLayout.java:453)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.widget.FrameLayout.onLayout(FrameLayout.java:388)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.View.layout(View.java:14858)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.ViewGroup.layout(ViewGroup.java:4646)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2035)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1792)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1047)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5896)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.Choreographer.doCallbacks(Choreographer.java:574)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.Choreographer.doFrame(Choreographer.java:544)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.os.Handler.handleCallback(Handler.java:733)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.os.Handler.dispatchMessage(Handler.java:95)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.os.Looper.loop(Looper.java:136)
07-15 12:48:20.377: E/AndroidRuntime(19899): at android.app.ActivityThread.main(ActivityThread.java:5103)
07-15 12:48:20.377: E/AndroidRuntime(19899): at java.lang.reflect.Method.invokeNative(Native Method)
07-15 12:48:20.377: E/AndroidRuntime(19899): at java.lang.reflect.Method.invoke(Method.java:515)
07-15 12:48:20.377: E/AndroidRuntime(19899): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
07-15 12:48:20.377: E/AndroidRuntime(19899): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:606)
07-15 12:48:20.377: E/AndroidRuntime(19899): at dalvik.system.NativeStart.main(Native Method)