Bohužel to nefunguje tady je log

07-25 17:00:45.755: E/AndroidRuntime(9541): 	... 10 more
07-25 17:03:36.158: E/AndroidRuntime(9846): FATAL EXCEPTION: main
07-25 17:03:36.158: E/AndroidRuntime(9846): Process: com.example.cron, PID: 9846
07-25 17:03:36.158: E/AndroidRuntime(9846): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.cron/com.example.cron.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.Calendar.get(int)' on a null object reference
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2255)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2317)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread.access$800(ActivityThread.java:143)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1258)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.os.Handler.dispatchMessage(Handler.java:102)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.os.Looper.loop(Looper.java:135)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread.main(ActivityThread.java:5070)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at java.lang.reflect.Method.invoke(Native Method)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at java.lang.reflect.Method.invoke(Method.java:372)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:836)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:631)
07-25 17:03:36.158: E/AndroidRuntime(9846): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.util.Calendar.get(int)' on a null object reference
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at com.example.cron.MainActivity.onCreate(MainActivity.java:18)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.Activity.performCreate(Activity.java:5720)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1102)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2208)
07-25 17:03:36.158: E/AndroidRuntime(9846): 	... 10 more