Android column '_id' does not exist?

Question

I\'m having trouble with something that works in the Notepad example. Here\'s the code from the NotepadCodeLab/Notepadv1Solution:

String[] from = new String[         


        

Answer 1

Tim Wu's code really works...

If you are using db.query, then it would be like this...

db.query(TABLE_USER, new String[] { 
                "rowid _id",
                FIELD_USERNAME,
                }, 
                FIELD_USERNAME + "=" + name, 
                null, 
                null, 
                null, 
                null);

Answer 2

Another way of dealing with the lack of an _id column in the table is to write a subclass of CursorWrapper which adds an _id column if necessary.

This has the advantage of not requiring any changes to tables or queries.

I have written such a class, and if it's of any interest it can be found at https://github.com/cmgharris/WithIdCursorWrapper