Setting the orientation for only 1 fragment in my activity while the rest is in portrait

Use the following code line in the fragment where you want a specific (in this case portrait) orientation.

getActivity().setRequestedOrientation(
            ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

If you want to have a orientation in a fragment, that is based on the way the user holds his device, then use the following code line.

getActivity().setRequestedOrientation(
                ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);

Hope, this will give you the intended solution.

In each of your fragments, set the requested orientation.

Reference doc: http://developer.android.com/reference/android/content/pm/ActivityInfo.html

@Override
public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);

   // Fragment locked in portrait screen orientation
   getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);    

   // Fragment locked in landscape screen orientation
   getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

   // Fragment screen orientation normal both portait and landscape       
   getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
}

Orientation attribute is per activity so you can declare the orientation for only the activity that contains the fragment so that it is in landscape and the rest of the activities will remain as they are.