title: Get fragment's container view id
body: <p>I have a fragment added using</p>
  
  <pre><code>transaction.add(R.id.content, fragment, null);
  </code></pre>
  
  <p>and I need to start new fragment from this one. But to do this I need to know first fragment's container view id (R.id.content in my case). How can I get this?</p>
  
  <p>I can just use this id directly but I suppose fragment shouldn't know such kind of details about parent activity. For example it will be impossible to use this fragment in another activity in this case.</p>
  
  <p>May be "starting" fragment from another one is a bad practice and all fragment handling logic should be handled by activity itself? But creating nice sequences of fragments starting each other seems quite useful (for example detalView->moreDetailView->evenMoreDetailView).</p>