title: How to Start Second Activity with Navigation in Jetpack
body: <p>You know It's official now: Google officially recommends single activity app architecture. But there is a difficulty here. We have multiple activities. So when I want to implement Navigation with multiple activities, but I failed.</p>
  
  <p>They said: In cases where multiple Activities share the same layout, the navigation graphs can be combined, replacing navigate calls to the activity destination to navigate calls directly between the two navigation graphs. <a href="https://developer.android.com/topic/libraries/architecture/navigation/navigation-migrate" rel="noreferrer">in here</a></p>
  
  <p>So I create this :</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;navigation xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  app:startDestination="@+id/nav_graph_firstActvity"&gt;
  
  &lt;activity
      android:id="@+id/nav_graph_firstActvity"
      android:name="io.androidedu.FirstActivity"
      android:label="First Activity"&gt;
  
      &lt;action
          android:id="@+id/nav_graph_actFirstActvity"
          app:destination="@id/nav_graph_secondActvity" /&gt;
  &lt;/activity&gt;
  
  &lt;activity
      android:id="@+id/nav_graph_secondActvity"
      android:name="io.androidedu.SecondActivity"
      android:label="Second Activity" /&gt;
  </code></pre>
  
  <p></p>
  
  <p>After that i can not find any sample for multiple activities <a href="https://developer.android.com/topic/libraries/architecture/navigation/navigation-implementing" rel="noreferrer">in here.</a>
  There is some sample like that :</p>
  
  <pre><code>Navigation.findNavController(view).navigate(R.id.nav_graph_actFirstActvity)
  </code></pre>
  
  <p>But findNavController() wait for a view, not an activity. </p>
  
  <p>How can I solve this folks? </p>