java - Android日历，获取事件ID

Question

我正在编写一个应用程序，需要将一些事件添加到 android 中的日历中。对于插入，我只使用了以下代码:

public void onItemClick(AdapterView<?> adapter, View curview, int position, long id) {
    WhoisEntry entry = this.adapter.getItem(position);      
    String domainName = entry.getDomainName();
    Date expDate = entry.expirationDate;
    Toast.makeText(getApplicationContext(), "Domain: " + domainName, Toast.LENGTH_SHORT).show();
    Calendar cal = Calendar.getInstance();            
    Intent intent = new Intent(Intent.ACTION_EDIT);
    intent.setType("vnd.android.cursor.item/event");
    intent.putExtra("beginTime", entry.expirationDate);
    intent.putExtra("allDay", false);       
    intent.putExtra("endTime", cal.getTimeInMillis()+60*60*1000);
    intent.putExtra("title", "Expiration of " + entry.domainName);
    startActivity(intent);
}

现在我想知道是否有可能获得与该事件关联的 ID，这样在插入事件并将其 ID 保存到我的应用程序后，用户可以直接从应用程序内部调用该事件。 可能吗？

Answer 1

我提取了一个列列表，用于将事件存储到 android 日历中。 这里是列表:

[0] “原始事件” (id=830007842672)
[1] "可用性状态"(id=830007842752)
[2] "ownerAccount"(id=830007842840)
[3] "_sync_account_type"(id=830007842920)
[4]“能见度”(id=830007843008)
[5] “规则” (id=830007843080)
[6] "lastDate"(id=830007843144)
[7] “有警报” (id=830007843216)
[8] "guestsCanModify"(id=830007843288) [9] "guestsCanSeeGuests"(id=830007843376)
[10] “排除” (id=830007843464)
[11] "rdate"(id=830007843528)
[12]“透明度”(id=830007843592)
[13] “时区” (id=830007843672)
[14]“选择”(id=830007843744)
[15] "dtstart"(id=830007843816) [16] "标题"(id=830007843888)
[17] "_sync_time"(id=830007843952)
[18] "_id"(id=830007844024) [19] "hasAttendeeData"(id=830007844088) [20] "_sync_id"(id=830007844176)
[21] "commentsUri"(id=830007844248) [22]“说明”(id=830007844328) [23] "htmlUri"(id=830007844408) [24] "_sync_account"(id=830007844480)
[25] "_sync_version"(id=830007844560)
[26] "hasExtendedProperties"(id=830007844640)
[27] "calendar_id"(id=830007844736)

然后，如果我想为我的 Activity 获取新的 Activity ID:

public static long getNewEventId(ContentResolver cr, Uri cal_uri){      
    Uri local_uri = cal_uri;
    if(cal_uri == null){
        local_uri = Uri.parse(calendar_uri+"events");
    } 
    Cursor cursor = cr.query(local_uri, new String [] {"MAX(_id) as max_id"}, null, null, "_id");
    cursor.moveToFirst();
    long max_val = cursor.getLong(cursor.getColumnIndex("max_id"));     
    return max_val+1;
}

AND 对于插入事件:

public void insertDomainEntry(Date exp_date, String name, long event_id){
    SQLiteDatabase db = getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put("exp_date", exp_date.getTime()/1000);
    values.put("event_id", event_id);
    values.put("domainname", name);
    db.insertOrThrow("domains_events", null, values);
}

该解决方案似乎有效，即使这可能不是一个很好的解决方案。

编辑 02/2015 getNextEventId 的目的是为事件表创建一个新的事件条目，这里是使用该方法的代码:

@Override
    public void onItemClick(AdapterView<?> adapter, View curview, int position,
            long id) {
        WhoisEntry entry = this.adapter.getItem(position);      
        long event_id = CalendarUtils.getNewEventId(getContentResolver(), null);

        Toast.makeText(getApplicationContext(), "Domain: " + entry.getDomainName(),
                Toast.LENGTH_SHORT).show();

        Intent intent = new Intent(Intent.ACTION_EDIT);
        intent.setType("vnd.android.cursor.item/event");
        intent.putExtra("beginTime", entry.getExpiration().getTime());
        intent.putExtra("_id", event_id);
        intent.putExtra("allDay", false);       
        intent.putExtra("endTime", entry.getExpiration().getTime()+60*30);
        intent.putExtra("title", "Expiration of " + entry.getDomainName());
        startActivity(intent);

        database.insertDomainEntry(entry.getExpiration(),
                entry.getDomainName(), event_id);
    }

更新 09/2015

根据评论中的要求，我添加了如何获取日历 URI(它基本上是存储日历的位置，应用程序尝试猜测它，在所有已知的可能的日历路径中搜索)

public static String getCalendarUriBase(Activity act) {     
    String calendarUriBase = null;
    Uri calendars = Uri.parse("content://calendar/calendars");
    Cursor managedCursor = null;

    try {
        managedCursor = act.getContentResolver().query(calendars,
                null, null, null, null);
    } catch (Exception e) {
    }

    if (managedCursor != null) {
        calendarUriBase = "content://calendar/";
    } else {
        calendars = Uri.parse("content://com.android.calendar/calendars");
        try {
            managedCursor = act.getContentResolver().query(calendars,
                    null, null, null, null);
        } catch (Exception e) {
        }
        if (managedCursor != null) {
            calendarUriBase = "content://com.android.calendar/";
        }
    }

    calendar_uri= calendarUriBase;
    return calendarUriBase;
}