I am Using View Pager to Display three Views.
\"Filter\",\"Streets\",\"Around\"
Each View is Defined by Fragment.
WHAT I WA
To use Google Maps, you have to extend MapActivity, which you didn't do. Check out this example in the docs. In the spirit of maintainability, I wouldn't resort to solutions that use deprecated functionality.
A more solid solution is to extend MapActivity and copy the missing implementation from FragmentActivity. If you don't want or need backwards compatiblity with older Android versions, just use MapActivity rather than FragmentActivity, which should already include the functionality needed to show Fragments in Android 3.0 and later.
Edit: here's a project that did it for you.