Saving Data on Android

Reading from a database
Before the record added in the previous step can be displayed, the app must have the 
capability to read the records from the database. First, the database must be queried 
for the records to display. Then, you will use a tool called the 
Cursor
 to iterate 
through the records and add them to a list.
Understanding the cursor
In Android, a 
Cursor
 is assigned to the result set of a query being run against the 
database. The 
Cursor
 is then used to iterate over the result set in a type-safe 
manner. It iterates through the result set 
row by row
, 
field by field
.
Internally, the rows of data that are returned by a query are stored in the 
Cursor
 
reads through the data-keeping track of its current position. To start iterating, the 
current position must be moved to point to a valid row of data, such as the first row. 
Then a loop structure is utilized to keep reading while a next record exists, to read in 
the result set.
In the