Error with new class
<p>For the class declaration i get this error: "The method onCreate(Bundle) of type XylophoneActivity must override or implement a supertype method" and not sure why.</p>

<pre><code>public class XylophoneActivity extends Activity {

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.xylophone_layout);

  }
}
</code></pre>
