title: actionbar tabs fragment layout to cover only part of screen
body: <p>From an Android example I can see how to do
  ActionBar tabs and how to use tabs for fragment switching, however in the example the fragment layout covers the whole screen.
  I want to put some controls at the bottom of the screen,
   which should be a part of and controlled by activity itself.</p>
  
  <p>So i want to keep the bottom of the screen same while clicking on tabs and switching between fragments.</p>
  
  <p>Thanks </p>