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

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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"/>