Saving Data on Android

com.raywenderlich.contentprovidertodo.provider
. A content URI can also 
perform pattern matches using content URIs that include wildcard characters.
•
*
 – Matches a string of any valid characters of any length.
•
#
 – Matches a string of numeric characters of any length.
Now that you've learned a little bit about content providers, it is time to create one 
of your own.
GeTng Started
Locate this chapter's folder in the provided materials, named 
content-provider
, and 
open up the 
projects
 folder. Next, open the 
ContentProviderToDo
 app under the 
starter
 folder. Allow the project to sync, download dependencies, and setup the 
workplace environment. For now, ignore the errors in the code.
Adding the provider package
It is a good idea to keep the provider classes in their own package. You will also 
include the contract class in this package. Right click on the