title: Error while importing the packages
body: <p>I am trying to understand the Tabs + ViewPager concepts in Android where I found this code while googling, <a href="http://thepseudocoder.wordpress.com/2011/10/13/android-tabs-viewpager-swipe-able-tabs-ftw/" rel="nofollow">http://thepseudocoder.wordpress.com/2011/10/13/android-tabs-viewpager-swipe-able-tabs-ftw/</a>. I was just trying to copy paste and I found that:</p>
  
  <pre><code>import android.support.v4.app.Fragment;
  import android.support.v4.app.FragmentManager;
  import android.support.v4.app.FragmentPagerAdapter; 
  </code></pre>
  
  <p>These 3 packages are unable to find their way i.e they are marked as an Error in my Eclipse and I am not very sure what to do with these packages.</p>
  
  <p>Anybody help me in getting that right and please let me know why these packages are used for? </p>