I was answering this question and noticed that there was an element of extortion involved which put an extra burden on the OP's question.
Is this allowed?
The deleted comment was in the context of "If you mark this solution as accepted then I will help you", which resulted in the OP having to deal with extra issues as a result - such as changing the database columns and getting null pointer exceptions.
I know it sounds trivial but was dismayed to see that being played out.
I did comment the person who answered, in their retaliation, the downvote of my answer ensued. The person's answer was subsequently marked as accepted (but: meanwhile deleted), and despite that, the OP was new to the arena of Android/Java programming.
What can be done about this?