根据联系人获得即将来临的生日-优快云博客

本文介绍了一种方法，用于从Android设备中批量获取联系人的生日信息，并按日期范围筛选出即将来临的生日。通过查询ContactsContract API，可以精确地获取到指定日期范围内的联系人生日。

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private static final int UPCOMING_COUNT = 10;

public static List<BContact> upcomingBirthday(Context ctx) {
String today = new SimpleDateFormat("MM-dd").format(new Date());
List<BContact> firstPart = upcomingBirthday(ctx, today, "12-31", UPCOMING_COUNT);
if (firstPart.size() < UPCOMING_COUNT) {
firstPart.addAll(upcomingBirthday(ctx, "01-01", today, UPCOMING_COUNT - firstPart.size()));
}
return firstPart;
}

public static List<BContact> upcomingBirthday(Context ctx, String fromDate, String toDate, int rows) {

Uri dataUri = ContactsContract.Data.CONTENT_URI;

String[] projection = new String[] { ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.CommonDataKinds.Event.CONTACT_ID,
ContactsContract.CommonDataKinds.Event.START_DATE
};

Cursor c = ctx.getContentResolver().query(
dataUri,
projection,
ContactsContract.Data.MIMETYPE + "= ? AND " +
ContactsContract.CommonDataKinds.Event.TYPE + "=" + ContactsContract.CommonDataKinds.Event.TYPE_BIRTHDAY +
" AND substr(" + ContactsContract.CommonDataKinds.Event.START_DATE + ",6) >= ?" +
" AND substr(" + ContactsContract.CommonDataKinds.Event.START_DATE + ",6) <= ?" ,
new String[] {ContactsContract.CommonDataKinds.Event.CONTENT_ITEM_TYPE, fromDate, toDate},
"substr("+ ContactsContract.CommonDataKinds.Event.START_DATE +",6)");
List<BContact> result = new ArrayList<BContact>();
int i=0;
while (c.moveToNext() && i<rows) {
result.add(new BContact(c.getString(0), c.getString(1), c.getString(2)));
i++;
}
c.close();
return result;