Question

我需要从所有Android联系人那里获取信息：

名字
姓氏
手机
出生日期

如果联系人有两个或更多手机号码，则必须多次适合选择。

现在我使用ContentResolver.Query()来获取所需的列，但需要多次查询，而不是连接表。

如何查询Android联系人的多个数据字段？

即。我需要执行类似SQL查询的东西：

SELECT
    dName.Data2 as [firstName]
    , dName.Data3 as [lastName]
    , dPhone.Data1 as [cellPhone]
FROM
   raw_contacts
INNER JOIN data as dName on dName.RAW_CONTACT_ID = Contacts._ID and dName.MIME_TYPE =  ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE
INNER JOIN data as dPhone on dName.RAW_CONTACT_ID = Contacts._ID and dName.MIME_TYPE =  ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE

Answer 1

您提到的所有字段最终都存储在ContactsContract.Data表中，因此无需加入。您只需查询数据表中的所有数据，同时选择特定的mimetypes（phone和event，即生日），为每个mimetype存储完整的联系人姓名和联系人ID以及：

Map<Long, List<String>> contacts = new HashMap<Long, List<String>>();

String[] projection = {Data.CONTACT_ID, Data.DISPLAY_NAME, Data.MIMETYPE, Data.DATA1, Data.DATA2, Data.DATA3};
String selection = Data.MIMETYPE + " IN ('" + Phone.CONTENT_ITEM_TYPE + "', '" + Event.CONTENT_ITEM_TYPE + "')";
Cursor cur = cr.query(Data.CONTENT_URI, projection, selection, null, null);

while (cur != null && cur.moveToNext()) {
    long id = cur.getLong(0);
    String name = cur.getString(1); // full name
    String mime = cur.getString(2); // phone / birthday
    String data = cur.getString(3); // the actual info, e.g. +1-212-555-1234

    String kind = "unknown";

    switch (mime) {
        case Phone.CONTENT_ITEM_TYPE: 
            kind = "phone"; 
            break;
        case Email.CONTENT_ITEM_TYPE: 
            Event = "birthday";
            break;
    }
    Log.d(TAG, "got " + id + ", " + name + ", " + kind + " - " + data);

    // add info to existing list if this contact-id was already found, or create a new list in case it's new
    List<String> infos;
    if (contacts.containsKey(id)) {
        infos = contacts.get(id);
    } else {
        infos = new ArrayList<String>();
        infos.add("name = " + name);
        contacts.put(id, infos);
    }
    infos.add(kind + " = " + data);
}

使用Android联系人

1 个答案: