title: Set default selected option in navigation drawer
body: <p>I am using the latest design support library. And I have set up the navigation view with four fragments as its menu items.</p>
  
  <p>I would like to have my first fragment (i.e first item in the navigation drawer)opened when the user starts the app. </p>
  
  <p>By default it shows me the MainActivity layout. </p>
  
  <p>I tried </p>
  
  <pre><code>navigationView.getMenu().getInt(0).setChecked(true);
  </code></pre>
  
  <p>But the above code does not do anything. </p>