Help Add contacts android app

[tajribati]

Hi everyone!
I have a problem in my android app that I can't fix it, my app consists on adding contacts and deleting them , it contains also 3 fragments.

Java files link:
https://gist.github.com/tajribati/90cea2e75991b3933960
Xml files link:
https://gist.github.com/tajribati/09feb2d305b865ba2880
The problem is in MainActivity.java file
Thanks in advance

 

[Mikestony]

http://androidforums.com/threads/developers-please-read-this-before-posting-in-here.904569/
Check out that thread for a helpful link ☺