title: How do I "Open the MainActivity class and add the corresponding method:"
body: <p>I am trying to following the <em>Building Your First App</em> from the Android developers site, and I'm stuck on the Lesson: <a href="http://developer.android.com/training/basics/firstapp/starting-activity.html#RespondToButton/" rel="nofollow" title="Project Link">Starting Another Activity</a></p>
  
  <p>I downloaded and installed Eclipse SDK and the ADT plugin and that is what I am using.</p>
  
  <p>I am hung up on the step on the page at the above link on the step where it says:</p>
  
  <blockquote>
    <p>Open the MainActivity class and add the corresponding method:</p>
  
  <pre><code>/** Called when the user clicks the Send button */
  public void sendMessage(View view) {
      // Do something in response to button
  }
  </code></pre>
    
    <p>Tip: In Eclipse, press Ctrl + Shift + O to import missing classes (Cmd + Shift + O on Mac).</p>
  </blockquote>
  
  <p>I do not know what file I should open. I am using Windows, so I tried pressing CTRL + Shift + O and nothing happened. I tried looking for *.class files and could not find one. The only class file that I see is classes.dex and I don't think that is it. Can someone please point me in the right direction?</p>