Use getView() or the View parameter from implementing the onViewCreated method. It returns the root view for the fragment (the one returned byonCreateView() method). With this you can call findViewById().

public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    ImageView imageView = (ImageView) getView().findViewById(;
    // or  (ImageView) view.findViewById(;

As getView() works only after onCreateView(), you can't use it insideonCreate() or onCreateView() methods of the fragment .