Saving Data on Android

Understanding content provider basics
In order to get data from a content provider, you use a mechanism called
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ContentResolver
. The content resolver provides methods to query(), update(), 
insert() and delete() data from a content provider. A request is made to a content 
resolver by passing a URI to one of the SQL-like methods. These methods return a 
Cursor
.
Note
: Cursor is defined and discussed in more detail in the previous SQLite 
chapter. A cursor is essentially a pointer to a row in a table of structured data 
that was returned by the query.
To interact with a content provider via a content resolver there are two basic steps:
1. Request permission from the provider by adding a permission in the manifest.
2. Construct a query with an appropriate content URI and send the query to the 
provider via a content resolver object.