Android - Google Maps API v2 - SupportMapFragment Errors

In your layout, use

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
              android:id="@+id/map"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              class="com.google.android.gms.maps.SupportMapFragment"/>

instead of

...    
android:name="com.google.android.gms.maps.SupportMapFragment"
...

You need to extend FragmentActivity if you are using SupportMapFragment. If you are using the MapFragment you can extend Activity.