Question

I’m trying to delete all contacts by a determinated group.

I’ve created the group with GROUP_ROW_ID = 987

So I should delete contacts with GROUP_ROW_ID = 987!

I don’t know how to delete them.
Can anyone help me?

Answer 1

If you haven’t solved it yet this is how I do it. By no means do I suggest this is an effective solution. This is just the straight forward solution.

First find all contact-ids having a specific group id. Then creating a ContentProviderOperation for each contact to be deleted, and last apply the list of delete operations.

private void deletaAllInGroup(Context context, long groupId)
   throws RemoteException, OperationApplicationException{
    String where = String.format("%s = ?", GroupMembership.GROUP_ROW_ID);
    String[] whereParmas = new String[] {Long.toString(groupId)};
    String[] colSelection = new String[] {Data.CONTACT_ID};

    Cursor cursor = context.getContentResolver().query(
            Data.CONTENT_URI, 
            colSelection, 
            where, 
            whereParmas, 
            null);

    ArrayList<ContentProviderOperation> operations = 
        new ArrayList<ContentProviderOperation>();

    // iterate over all contacts having groupId 
    // and add them to the list to be deleted
    while(cursor.moveToNext()){ 
        String where = String.format("%s = ?", RawContacts.CONTACT_ID);
        String[] whereParams = new String[]{Long.toString(cursor.getLong(0))};

        operations.add(ContentProviderOperation.newDelete(RawContacts.CONTENT_URI)
        .withSelection(where, whereParams)
        .build());
    }

    context.getContentResolver().applyBatch(
        ContactsContract.AUTHORITY, operations );
}