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<uses-permission android:name="android.permission.READ_CALENDAR"/>
<uses-permission android:name="android.permission.WRITE_CALENDAR"/>

static{
	if(Integer.parseInt(Build.VERSION.SDK) >= 8){
		calanderURL = "content://com.android.calendar/calendars";
		calanderEventURL = "content://com.android.calendar/events";
		calanderRemiderURL = "content://com.android.calendar/reminders";
	}else{
		calanderURL = "content://calendar/calendars";
		calanderEventURL = "content://calendar/events";
		calanderRemiderURL = "content://calendar/reminders";
	}
}

public class GoogleCalendarUtil {

	private Context mContext;
	private SharedData share;
	private static String calanderURL = "";
	private static String calanderEventURL = "";
    private static String calanderRemiderURL = "";
    private String calId = "";

    //为了兼容不同版本的日历,2.2以后Uri发生改变
    static{
    	if(Integer.parseInt(Build.VERSION.SDK) >= 8){
    		calanderURL = "content://com.android.calendar/calendars";
    		calanderEventURL = "content://com.android.calendar/events";
    		calanderRemiderURL = "content://com.android.calendar/reminders";
    	}else{
    		calanderURL = "content://calendar/calendars";
    		calanderEventURL = "content://calendar/events";
    		calanderRemiderURL = "content://calendar/reminders";
    	}
    }

    public GoogleCalendarUtil(Context context) {
		super();
		this.mContext = context;
		share = new SharedData(mContext);

		//获取要出入的gmail账户的id
		Cursor userCursor = mContext.getContentResolver().query(Uri.parse(calanderURL),
				null, null, null, null);
		if(userCursor.getCount() > 0){
			userCursor.moveToFirst();
			calId = userCursor.getString(userCursor.getColumnIndex("_id"));
		}
	}

	/**
	 * 添加生日信息到Google Calendar
	 *
	 */
	public void addToGoogleCalendar(Friend f, Calendar birthday) {

		ContentValues event = new ContentValues();
    	event.put("title", f.getName() + "生日");
    	event.put("description", f.getName() + "生日到了，记得问候！");

    	event.put("calendar_id",calId);

    	birthday.set(Calendar.HOUR_OF_DAY, 8);
    	long start = birthday.getTime().getTime();
    	birthday.set(Calendar.HOUR_OF_DAY, 12);
    	long end = birthday.getTime().getTime();

    	event.put("dtstart", start);
    	event.put("dtend", end);
    	event.put("allDay", 1); // 0 for false, 1 for true
    	event.put("hasAlarm",1);// 0 for false, 1 for true 

    	Uri newEvent = mContext.getContentResolver().insert(Uri.parse(calanderEventURL), event);
    	//获取所添加的event的主键_id
    	long id = Long.parseLong( newEvent.getLastPathSegment() );
    	ContentValues values = new ContentValues();
        values.put( "event_id", id );

        //设置提前提醒时间
        int advanceDays = share.getAdvanceTime();
        if (advanceDays == 0) {
        	// 默认提前十分钟
        	values.put( "minutes", 10);
		} else {
			values.put( "minutes", advanceDays * 24 * 60);
		}
        //设置提醒
        mContext.getContentResolver().insert(Uri.parse(calanderRemiderURL), values);

        //给Friend添加事件id,同时更新friend信息
        f.setSign("" + id);
	}

	/**
	 * 修改已保存的日程
	 * @param name  好友姓名
	 * @param id	好友id
	 * @param recentBirthday 最近生日
	 */
	public void updateEvent(Friend f, Calendar birthday) {
		Uri eventsUri = Uri.parse(calanderEventURL);
        Uri eventUri = ContentUris.withAppendedId(eventsUri, Long.parseLong(f.getSign()));

		Cursor c = mContext.getContentResolver().query(eventsUri,
				null, "_id=?", new String[]{f.getSign()}, null);
		if (c == null || c.getCount() <= 0) {
			//没有查询到日程时，则新增日程
			addToGoogleCalendar(f, birthday);
			return ;
		}

		ContentValues event = new ContentValues();
    	event.put("title", f.getName() + "生日");
    	event.put("description", f.getName() + "生日到了，记得问候！");
    	event.put("calendar_id",calId);

    	birthday.set(Calendar.HOUR_OF_DAY, 8);
    	long start = birthday.getTime().getTime();
    	birthday.set(Calendar.HOUR_OF_DAY, 12);
    	long end = birthday.getTime().getTime();
    	event.put("dtstart", start);
    	event.put("dtend", end);

    	mContext.getContentResolver().update(eventUri, event, null, null);
	}

	/**
	 * 删除日程
	 * @param sign
	 */
	public void deleteEvent(String sign) {
		Uri eventsUri = Uri.parse(calanderEventURL);
        Uri eventUri = ContentUris.withAppendedId(eventsUri, Long.parseLong(sign));
		mContext.getContentResolver().delete(eventUri, null, null);
	}
}