Saving Data on Android

update 
the table
, by adding a new column — 
toDoPriority
.
In the next steps, you will add the CRUD operations to the database handler 
implementation.
Using ContentValues
Before you add items to the database, it is important to understand a construct 
known as 
ContentValues
. This is a class that allows you to store values that a 
ContentResolver
 can process. The information that is stored in objects of this class 
is stored as key-value pairs.
The key consists of the column name for the piece of information being stored, and 
the value consists of the value to be stored in that column. A key-value pair for each 
column of the database in a particular row is