title: How to add a Fragment ID or Fragment tag for a fragment in a ViewPager
body: <p>I have Tabs + ViewPager in my Android app.</p>
  
  <p>From the main activity, I want to send some data to these fragments. How do I get these fragments in the first place? I suppose I need to use <code>getSupportFragmentManager().findFragmentById(R.id.--)</code></p>
  
  <p>How do I set the ID or the Tag in the first place?</p>