title: Android Fragment initialization
body: <p>I am meeting with <strong>Fragment</strong> for the first time. So it is a bit complicated to me. I am reading a tutorial at <a href="http://androidhive.com" rel="nofollow">android-hive</a>. But I am unable to understand a point. There are something I don't understand. 
  There are oneFragment(), twoFragment()... But I can't initiate them. So, please complete any of those... oneFragmemt() or twoFragment() from this <a href="http://www.androidhive.info/2015/09/android-material-design-working-with-tabs/" rel="nofollow">link</a>. I will be so pleased. Help me...</p>