在特定片段的 OnCreateView(View view)中尝试此操作

Try this in OnCreateView(View view) of particular fragment,

//ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE

  getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

//ActivityInfo.SCREEN_ORIENTATION_PORTRAIT

  getActivity()setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);