title: Xamarin - Classes not found (android support library)
body: <p>I'm trying to implement Material Design with backward compatibility using AppCompat.</p>
  
  <p>Following the <a href="https://blog.xamarin.com/android-tips-hello-material-design-v7-appcompat/" rel="nofollow">tutorial</a>.</p>
  
  <p>But I'm getting the following error</p>
  
  <p><code>Error 1 error: package android.support.v4.app.FragmentManager does not exist
  android.support.v4.app.FragmentManager.OnBackStackChangedListener
  C:\Users\Italo\Documents\Xamarin\TemaMaterial\TemaMaterial\obj\Debug\android\src\mono\android\support\v4\app\FragmentManager_OnBackStackChangedListenerImplementor.java 8 41 TemaMaterial
  Error 2 error: package android.support.v4.content.Loader does not exist
  android.support.v4.content.Loader.OnLoadCompleteListener
  C:\Users\Italo\Documents\Xamarin\TemaMaterial\TemaMaterial\obj\Debug\android\src\mono\android\support\v4\content\Loader_OnLoadCompleteListenerImplementor.java 8 36 TemaMaterial
  Error 3 error: package android.support.v4.content does not exist
  public void onLoadComplete (android.support.v4.content.Loader p0, java.lang.Object p1)
  C:\Users\Italo\Documents\Xamarin\TemaMaterial\TemaMaterial\obj\Debug\android\src\mono\android\support\v4\content\Loader_OnLoadCompleteListenerImplementor.java 27 56 TemaMaterial</code></p>
  
  <p>It says that the package does not existe, but it exists.
  I still can't add images, so, here is the <a href="http://imgur.com/qMSeaP0" rel="nofollow">link</a></p>