Android app how to implement "change user"
<p>I want to implement an app is about Body weight Calendar,
How do I add a new User and change the data with it?</p>

<p>Should I use "fragmentActivity"? Cuz I use it to implement Tabs + ViewPager Showing.(Like this<a href="http://thepseudocoder.wordpress.com/2011/10/13/android-tabs-viewpager-swipe-able-tabs-ftw/" rel="nofollow">Tabs + ViewPager</a>)</p>

<p>Can anyone give me a sample or advice(Keyword)?  thanks.</p>
