Android CalendarView Начало работы

Question

Привет В моем приложении я использую навигационный ящик для перемещения из одного фрагмента в другой. В этом я добавил один календарный вид в один фрагмент. Всякий раз, когда я пытаюсь открыть этот фрагмент. приложение закрывается. Говоря, что приложение «...» закрыто. И мой fragment.xml является

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent"> 

<CalendarView 
    android:id="@+id/calendarView1" 
    android:layout_width="match_parent" 
    android:layout_height="300dp" 
    android:layout_alignParentBottom="true" 
    android:layout_alignParentLeft="true" 
    android:layout_marginBottom="53dp" /> 

</RelativeLayout> 

И файл Java является

public class AcademicCalendarFrament extends Fragment { 

public AcademicCalendarFrament(){} 

CalendarView calendar; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 

    View rootView = inflater.inflate(R.layout.fragment_calendar, container, false); 

    return rootView; 
} 

@Override 
public void onActivityCreated(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onActivityCreated(savedInstanceState); 

    calendar=(CalendarView) getActivity().findViewById(R.id.calendarView1); 

    //initializes the calendarview 
    initializeCalendar(); 

} 

public void initializeCalendar() { 
    // TODO Auto-generated method stub 

    calendar = (CalendarView) getActivity().findViewById(R.id.calendarView1); 

    // sets whether to show the week number. 
    calendar.setShowWeekNumber(false); 

    // sets the first day of week according to Calendar. 
    // here we set Monday as the first day of the Calendar 

    calendar.setFirstDayOfWeek(2); 

    //The background color for the selected week. 
    calendar.setSelectedWeekBackgroundColor(getActivity().getResources().getColor(R.color.green)); 

    //sets the color for the dates of an unfocused month. 
    calendar.setUnfocusedMonthDateColor(getActivity().getResources().getColor(R.color.transparent)); 

    //sets the color for the separator line between weeks. 
    calendar.setWeekSeparatorLineColor(getActivity().getResources().getColor(R.color.transparent)); 

    //sets the color for the vertical bar shown at the beginning and at the end of the selected date. 
    calendar.setSelectedDateVerticalBar(R.color.darkgreen); 

    //sets the listener to be notified upon selected date change. 
    calendar.setOnDateChangeListener(new OnDateChangeListener() { 

     //show the selected date as a toast 

     public void onSelectedDayChange(CalendarView view, int year, int month, int day) { 

      Toast.makeText(getActivity().getApplicationContext(), day + "/" + month + "/" + year, Toast.LENGTH_LONG).show(); 

     } 

    }); 

} 
} 

И мои ошибки LogCat являются

10-14 17:32:59.345: E/AndroidRuntime(31041): FATAL EXCEPTION: main 
10-14 17:32:59.345: E/AndroidRuntime(31041): Process: com.example.everwinvidhyashram, PID: 31041 
10-14 17:32:59.345: E/AndroidRuntime(31041): java.lang.NullPointerException 
10-14 17:32:59.345: E/AndroidRuntime(31041): at com.example.everwinvidhyashram.AcademicCalendarFrament.onActivityCreated(AcademicCalendarFrament.java:34) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at android.app.Fragment.performActivityCreated(Fragment.java:1708) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:908) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1062) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at android.app.BackStackRecord.run(BackStackRecord.java:684) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1447) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at android.app.FragmentManagerImpl$1.run(FragmentManager.java:443) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at android.os.Handler.handleCallback(Handler.java:733) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at android.os.Handler.dispatchMessage(Handler.java:95) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at android.os.Looper.loop(Looper.java:136) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at android.app.ActivityThread.main(ActivityThread.java:5086) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at java.lang.reflect.Method.invokeNative(Native Method) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at java.lang.reflect.Method.invoke(Method.java:515) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
10-14 17:32:59.345: E/AndroidRuntime(31041): at dalvik.system.NativeStart.main(Native Method) 

Answer 1

попробовать, как это,

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 

    View rootView = inflater.inflate(R.layout.fragment_calendar, container, false); 

    calendar=(CalendarView) rootView.findViewById(R.id.calendarView1); 

    initializeCalendar(); 

    return rootView; 
} 

удалить onActivityCreated() , а также удалить calendar = (CalendarView) getActivity(). findViewById (R.id.calendarView1); from initializeCalendar() метод