loadAllContacts.kt

private fun loadAllContacts(): Map<Long, ContactModel> {
    val uri = ContactsContract.Data.CONTENT_URI
    val selection = "${ContactsContract.Data.MIMETYPE} = ? "
    val selectionArgs = arrayOf(ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE)
    val itemsMap = mutableMapOf<Long, ContactModel>()

    contentResolver.query(
        uri,
        getContactProjection(),
        selection,
        selectionArgs,
        getSortString()
    ).use { cursor ->
        if (cursor?.moveToFirst() == true) {
            do {
                val id = cursor.getLongValue(ContactsContract.Data.RAW_CONTACT_ID)
                val contactId = cursor.getLongValue(ContactsContract.Data.CONTACT_ID)
                val photoUri = cursor.getStringValue(ContactsContract.CommonDataKinds.Phone.PHOTO_URI)
                val name = cursor.getStringValue(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME)
                val firstName = cursor.getStringValue(ContactsContract.CommonDataKinds.StructuredName.GIVEN_NAME)
                val surname = cursor.getStringValue(ContactsContract.CommonDataKinds.StructuredName.FAMILY_NAME)
                itemsMap[id] = ContactModel(
                    id = id,
                    contactId = contactId,
                    photoUri = photoUri,
                    firstName = firstName,
                    surname = surname,
                    fullName = name
                )
            } while (cursor.moveToNext())
        }
    }
    return itemsMap
}