First commit not using Navigation Drawer, only ActionBar Compact. I will try to make the App with this structure.
Updating little changes.
Palette of colors added to colors.xml.
Gitignore file updated.
Added some diferent regions App name (Secret Santa, Kris Kringle, Amigo Invisible, Amigo Secreto).
Added ListView for groups.
Database management added.
Path fixed and model classes created.
Updated some db access methods.
Database method to obtain the list of principal activity (and also the method in application).
Date format for locale in principal activity.
Some changes to general structure.
Intent to group activity.
GroupActivity fixed.
Some strings added.
Some database modifications.
Some modifications on items for listviews.
Context menu to MainActivity.
Add new participant (only email) from contact list.
Change name to group (and some fixes on DB updates methods).