Issue designing google maps app in the application

I have seen the tutorial provided to display google maps here... http://developer.android.com/resources/tutorials/views/hello-mapview.html.

But sadly when i try to extend MapActivity instead of Activity the whole program is getting ruined and showing errors starting from onCreate... Whats the solution and how could i get google maps working in my application???开发者_StackOverflow

Well, including the errors will help to provide you more accurate answers. The emulator where you are running your application on should support Google APIs and the manifest should include

<uses-library android:name="com.google.android.maps"/>