How to get Contact ID, Email, Phone number in one SQLite query ? Contacts Android Optimization

Question

I want to fetch All Contacts atleast with one phone Number, also I want all Phone Numbers and All emails for every Contact.

Current code :

// To get         


        

Answer 1

ICS: When you query from Data.CONTENT_URI you have all the rows from the associated Contact already joined - i.e. this would work:

ContentResolver resolver = getContentResolver();
Cursor c = resolver.query(
        Data.CONTENT_URI, 
        null, 
        Data.HAS_PHONE_NUMBER + "!=0 AND (" + Data.MIMETYPE + "=? OR " + Data.MIMETYPE + "=?)", 
        new String[]{Email.CONTENT_ITEM_TYPE, Phone.CONTENT_ITEM_TYPE},
        Data.CONTACT_ID);

while (c.moveToNext()) {
    long id = c.getLong(c.getColumnIndex(Data.CONTACT_ID));
    String name = c.getString(c.getColumnIndex(Data.DISPLAY_NAME));
    String data1 = c.getString(c.getColumnIndex(Data.DATA1));

    System.out.println(id + ", name=" + name + ", data1=" + data1);
}

If you are targeting 2.3 you need to account for the fact that HAS_PHONE_NUMBER is not available through the joins used when querying Data.

Fun.

This could, for instance, be solved either by skipping your requirement that the contact must have a phone number and instead settle for "any contact with at least a phone number or an e-mail address":

Cursor c = resolver.query(
        Data.CONTENT_URI, 
        null, 
        Data.MIMETYPE + "=? OR " + Data.MIMETYPE + "=?", 
        new String[]{Email.CONTENT_ITEM_TYPE, Phone.CONTENT_ITEM_TYPE},
        Data.CONTACT_ID);

If that is not an option you can always go for a horribly hacky sub-select:

Cursor c = resolver.query(
        Data.CONTENT_URI, 
        null, 
        "(" + Data.MIMETYPE + "=? OR " + Data.MIMETYPE + "=?) AND " + 
        Data.CONTACT_ID + " IN (SELECT " + Contacts._ID + " FROM contacts WHERE " + Contacts.HAS_PHONE_NUMBER + "!=0)", 
        new String[]{Email.CONTENT_ITEM_TYPE, Phone.CONTENT_ITEM_TYPE}, Data.CONTACT_ID);

or solve it by using two Cursors:

Cursor contacts = resolver.query(Contacts.CONTENT_URI, 
        null, Contacts.HAS_PHONE_NUMBER + " != 0", null, Contacts._ID + " ASC");
Cursor data = resolver.query(Data.CONTENT_URI, null, 
        Data.MIMETYPE + "=? OR " + Data.MIMETYPE + "=?", 
        new String[]{Email.CONTENT_ITEM_TYPE, Phone.CONTENT_ITEM_TYPE}, 
        Data.CONTACT_ID + " ASC");

int idIndex = contacts.getColumnIndexOrThrow(Contacts._ID);
int nameIndex = contacts.getColumnIndexOrThrow(Contacts.DISPLAY_NAME);
int cidIndex = data.getColumnIndexOrThrow(Data.CONTACT_ID);
int data1Index = data.getColumnIndexOrThrow(Data.DATA1);
boolean hasData = data.moveToNext();

while (contacts.moveToNext()) {
    long id = contacts.getLong(idIndex);
    System.out.println("Contact(" + id + "): " + contacts.getString(nameIndex));
    if (hasData) {
        long cid = data.getLong(cidIndex);
        while (cid <= id && hasData) {
            if (cid == id) {
                System.out.println("\t(" + cid + "/" + id + ").data1:" + 
                        data.getString(data1Index));
            }
            hasData = data.moveToNext();
            if (hasData) {
                cid = data.getLong(cidIndex);
            }
        }
    }
}