想要显示区域设置日历的事件

Question

我是android的新手。我使用内容提供商http://www.grokkingandroid.com/androids-calendarcontract-provider/创建了本地日历。现在我想在活动中显示今天的活动。我为此创建了一个游标。现在我想用这个光标显示事件，我非常有限。我需要帮助！

谢谢！

public void readCalendarEvents(Context context) {

    Time time = new Time();
    time.setToNow();
    Long beginTime=time.toMillis(false);
    time.set(59, 59, 23, time.monthDay, time.month, time.year);
    Long endTime=time.toMillis(false);

    String[] proj= new String[]{Instances._ID, Instances.TITLE, Instances.BEGIN, Instances.END, Instances.EVENT_ID};

    Cursor cursor = Instances.query(context.getContentResolver(), proj, beginTime, endTime);
}

我修改我的代码以返回光标，片段将使用此光标显示日历事件列表。你能帮我验证这些代码吗？我在行上得到一个nullPointerException：cursor = myCalendar.readCalendarEvents（getActivity（））;

我的光标类：

public Class MyCalendar{
public Cursor readCalendarEvents(Context context) {

    Time time = new Time();
    time.setToNow();
    Long beginTime = time.toMillis(false);
    time.set(59, 59, 23, time.monthDay, time.month, time.year);
    Long endTime = time.toMillis(false);

    String[] proj = new String[] { Instances._ID, Instances.TITLE,
            Instances.BEGIN, Instances.END, Instances.EVENT_ID };

    Cursor cursor = Instances.query(context.getContentResolver(), proj,
            beginTime, endTime);


    return cursor;

} }

这是我的片段代码：

public class ViewMyCalendarEvents extends Fragment{

private MyCalendar myCalendar;
private Cursor cursor;
private ListView listView;

public ViewMyCalendarEvents() {

}

@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
}

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

    final View view = inflater.inflate(
            R.layout.fragment_list_events, container, false);


    listView = (ListView) view.findViewById(R.id.list_events_list);

    cursor = myCalendar.readCalendarEvents(getActivity());

    final String[] fromColumns = { "title", "beginDate", "endDate" };

    final SimpleCursorAdapter adapter = new SimpleCursorAdapter(getActivity(),
            R.layout.fragment_list_events_items, cursor, fromColumns,
            new int[] { R.id.event_list_title, R.id.event_list_begin,
                    R.id.event_list_end }, 0);

    listView.setAdapter(adapter);

    return view;
}

}

谢谢！