How do I make a case insensitive query with ContentResolver in Android?

Question

My goal is to get all rows from native db with a specific email address on Android Gingerbread and above.

This query gets only the rows where the case also matches.

Answer 1

Please try (I suppose that mail is String object):

Cursor cursor = context.getContentResolver().query(ContactsContract.CommonDataKinds.Email.CONTENT_URI,
        new String[] {Contacts._ID}, "lower("+ContactsContract.CommonDataKinds.Email.ADDRESS + ")=lower('"+ email +"')",
        null, null);

or

Cursor cursor = context.getContentResolver().query(ContactsContract.CommonDataKinds.Email.CONTENT_URI,
        new String[] {Contacts._ID}, "lower("+ContactsContract.CommonDataKinds.Email.ADDRESS + ")=lower('"+ email +"')",
        new String[] {}, null);

Answer 2

Also try

Cursor cursor = context.getContentResolver().query(ContactsContract.CommonDataKinds.Email.CONTENT_URI,
            new String[] {Contacts._ID}, ContactsContract.CommonDataKinds.Email.ADDRESS + "=? COLLATE NOCASE",
            new String[] {email}, null);

Note that added COLLATE NOCASE in the query.

Answer 3

Cursor cursor = this.db.query("UserTbl", new String[] {"UserId",
                        "Username", "Password" },
                        "Username = ? COLLATE NOCASE AND Password = ? COLLATE NOCASE", new String[] { userNameString,
                                passwordString }, null, null, null);