android facing problems to use fragments in android 2.2

I am starting my programming with fragments. i want to do it for android 2.2 first then for a开发者_JAVA百科ndroid 3.0/3.1/3.2.

I added Compatibility package , all things i did. What i want just give me some sample example for android 2.2 fragments for better understanding that how to use fragments in application.

there are the Api4+ and the API 13+ demos. You can download an install on your phone and try it and choose which one is the best for you. The source code is very helpful and commented.