09-13 12:11:13.413: ERROR/AndroidRuntime(7638): FATAL EXCEPTION: main
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): java.lang.NullPointerException
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at com.company.myapp.ArticlesActivity.onKeyDown(ArticlesActivity.java:56)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at android.view.KeyEvent.dispatch(KeyEvent.java:1494)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at android.app.Activity.dispatchKeyEvent(Activity.java:2196)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1735)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at android.view.ViewRoot.deliverKeyEventToViewHierarchy(ViewRoot.java:2702)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2677)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at android.view.ViewRoot.handleMessage(ViewRoot.java:1965)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at android.os.Handler.dispatchMessage(Handler.java:99)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at android.os.Looper.loop(Looper.java:143)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at android.app.ActivityThread.main(ActivityThread.java:4268)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at java.lang.reflect.Method.invokeNative(Native Method)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at java.lang.reflect.Method.invoke(Method.java:507)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
09-13 12:11:13.413: ERROR/AndroidRuntime(7638): at dalvik.system.NativeStart.main(Native Method)