将ACCOUNT_TYPE_LOCAL添加到Android 4的日历会使其日历崩溃

我想在Android中添加一个未同步的新日历 . 我编写了一个使用API级别14的新CalendarContract API执行此操作的应用程序 . 以下代码工作正常 . 我可以在Android的日历应用中看到新日历，并为其添加活动 .

问题是当我选择时，Android日历应用程序崩溃：菜单 - >要显示的日历 - >要同步的日历

我的代码中有什么问题或是Android日历中的错误吗？

请注意，我不想实际使用同步适配器 . CalendarContract.Calendars的文档说不需要这样做：“如果需要本地日历，应用程序可以通过插入同步适配器并使用ACCOUNT_TYPE ACCOUNT_TYPE_LOCAL来实现 . ”我知道“作为同步适配器插入”意味着将（CalendarContract.CALLER_IS_SYNCADAPTER，“true”）附加到URI .

public class CalendarMapper {

private static final String ACCOUNT_NAME = "private";
private static final String INT_NAME_PREFIX = "priv";

private static Uri buildCalUri() {
    return CalendarContract.Calendars.CONTENT_URI
            .buildUpon()
            .appendQueryParameter(CalendarContract.CALLER_IS_SYNCADAPTER, "true")
            .appendQueryParameter(Calendars.ACCOUNT_NAME, ACCOUNT_NAME)
            .appendQueryParameter(Calendars.ACCOUNT_TYPE, CalendarContract.ACCOUNT_TYPE_LOCAL)
            .build();
}

private static ContentValues buildContentValues(Calendar calendar) {
    String dispName = calendar.getName();  //Calendar.getName() returns a String
    String intName = INT_NAME_PREFIX + dispName;
    final ContentValues cv = new ContentValues();
    cv.put(Calendars.ACCOUNT_NAME, ACCOUNT_NAME);
    cv.put(Calendars.ACCOUNT_TYPE, CalendarContract.ACCOUNT_TYPE_LOCAL);
    cv.put(Calendars.NAME, intName);
    cv.put(Calendars.CALENDAR_DISPLAY_NAME, dispName);
    cv.put(Calendars.CALENDAR_COLOR, calendar.getColor());  //Calendar.getColor() returns int
    cv.put(Calendars.CALENDAR_ACCESS_LEVEL, Calendars.CAL_ACCESS_OWNER);
    cv.put(Calendars.OWNER_ACCOUNT, ACCOUNT_NAME);
    cv.put(Calendars.VISIBLE, 1);
    cv.put(Calendars.SYNC_EVENTS, 1);
    return cv;
}

public static void addCalendar(Calendar calendar, ContentResolver cr) {
    if (calendar == null)
        throw new IllegalArgumentException();

    final ContentValues cv = buildContentValues(calendar);

    Uri calUri = buildCalUri();
    cr.insert(calUri, cv);
}

}

以下是导致日历应用崩溃的异常堆栈跟踪：

03-22 07:12:39.437: E/AndroidRuntime(9730): FATAL EXCEPTION: main
  03-22 07:12:39.437: E/AndroidRuntime(9730): java.lang.NullPointerException
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at com.android.calendar.selectcalendars.SelectSyncedCalendarsMultiAccountAdapter.bindGroupView(SelectSyncedCalendarsMultiAccountAdapter.java:324)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.CursorTreeAdapter.getGroupView(CursorTreeAdapter.java:207)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.ExpandableListConnector.getView(ExpandableListConnector.java:445)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.AbsListView.obtainView(AbsListView.java:2033)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.ListView.makeAndAddView(ListView.java:1772)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.ListView.fillDown(ListView.java:672)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.ListView.fillFromTop(ListView.java:732)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.ListView.layoutChildren(ListView.java:1611)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.AbsListView.onLayout(AbsListView.java:1863)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.View.layout(View.java:11278)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.ViewGroup.layout(ViewGroup.java:4224)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1628)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1486)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.LinearLayout.onLayout(LinearLayout.java:1399)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.View.layout(View.java:11278)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.ViewGroup.layout(ViewGroup.java:4224)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.View.layout(View.java:11278)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.ViewGroup.layout(ViewGroup.java:4224)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1628)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1486)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.LinearLayout.onLayout(LinearLayout.java:1399)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.View.layout(View.java:11278)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.ViewGroup.layout(ViewGroup.java:4224)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.widget.FrameLayout.onLayout(FrameLayout.java:431)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.View.layout(View.java:11278)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.ViewGroup.layout(ViewGroup.java:4224)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1489)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2442)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.os.Handler.dispatchMessage(Handler.java:99)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.os.Looper.loop(Looper.java:137)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at android.app.ActivityThread.main(ActivityThread.java:4424)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at java.lang.reflect.Method.invokeNative(Native Method)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at java.lang.reflect.Method.invoke(Method.java:511) 
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
  03-22 07:12:39.437: E/AndroidRuntime(9730):   at dalvik.system.NativeStart.main(Native Method)